Final Pot Ptfe Design Sheet_02.01.13

7/27/2019 Final Pot Ptfe Design Sheet_02.01.13

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Bearing DesignY

General Bearing Composition:

X

Long

Tran

Fixed

Pin B

1.ROB INPUT

24000 mm

14800 m

6.13E+10 mm4

7.66E+10 mm4

2.00E+05 N/mm2

Grade of concrete M 40

Area of steel, As 64120 mm2

Area of concrete, Ac 680000 mm2

6

12

2.Configuration Check of bearings

A1 A2

Girders

B1 B2

C1(Fixed) C2

D1 D2

E1 E2

F1 F2

= Yes

= OK

3.Calculation of longitudinal movement= 24000 mm

= 60 degrees Ref: Clause 922.2 of IRC:83 (Part III)-2002

= 7.50 Mpa

= 64120 mm2

= 680000 mm2

= 2.00E-05 per degree cl 218.4 of IRC-6 & cl304.9.1 of IRC-21

= 1.17E-05 per degree cl 218.4 of IRC-6 & cl304.9.1 of IRC-21

= 0.71

= 21.80 mm

4. Calculation of lateral movement

= 5.449 mm Almost 25% of the longitudinal movement

Lo (Effective Span of ROB)

t (Tmp Variation)

m (Modulus ratio)

As (area of steel)

Ac (area of concrete)

s (Tmp coeffecient of Steel)

c (Tmp coeffecent of concrete)

k = (mAs/Ac) * (1+ct)/(1st)

L = *(c k.s) / (k 1)+ Lot

Transverse movement in lateral dirn

Nomenclature:

No of Girders

No of Bearing Positions

Trans. sliding Free Bearing

E

Free Bearing

Span

Deck Width

I_ for permanent action

I_ for variable action

Fixed Bearing Long. sliding


Free Bearing


Trans. sliding

Trans. sliding

Check for Configurtion of Bearings

Pin to be Provided

Longitudinal Girders


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5. Bearing Design Inputs:INPUT CHECK INPUT CHECK INPUT CHECK INPUT CHECK IN

mm 224 OK 224 OK 224 OK 224 OK 2

mm 20 OK 20 OK 20 OK 20 OK 2

mm 40 OK 40 OK 40 OK 40 OK 5

mm 384 384 384 384 4

mm 224 224 224 224 3mm 45 45 45 45 9

mm 394 OK 394 OK 394 OK 394 OK 6

mm 40 OK 40 OK 40 OK 40 OK 8

mm 40 40 40 40 9

mm 35 35 35 35 3

mm 222 222 222 222 3

mm 362 362 362 362 4

mm 8 8 8 8 4

mm 43 43 43 43 7

mm 28 28 28 28 3

mm 8 8 8 8 1

mm 12 12 12 12 1Nos 2 2 2 2

mm 4 4 4 4

mm 10 10 10 10 1

Nos 8 8 8 8 1

mm 20 20 20 20 2

mm NA 224 224 224 N

mm NA 4.5 OK 5 OK 5 OK N

mm NA 28 28 28 N

mm NA 50 50 50 N

mm NA 312 312 312 N

mm NA 350 350 350 N

mm NA 350 350 350 N

mm NA 36 36 36 N

= 35 Mpa Cl 926.2.3.2 of IRC-83(III)

= 40 Mpa Cl 926.2.4.3 of IRC-83(III)

= 340 Mpa Grade-340-570W as per IS-1030

= 190 Mpa

= 286 Mpa

= 250 Mpa

6. Design Outputs: FIXED FREE LONG_SLD TRNS_SLD PINOK OK OK OK NA

OK OK OK OK NA

OK OK OK OK OK

OK OK OK OK OK

OK OK OK OK OK

OK OK OK OK OK

OK OK OK OK OK

OK OK OK OK OK

OK OK OK OK OK

OK OK OK OK OK

NA OK OK OK NA

NA OK OK OK NA

Design Result: OK OK OK OK OK

Sliding Capacity of stainless steel

Check on Piston rotaion gap:

Vertical Face of Piston required cl 926.3.1.3.1 of IRC-83(III)

Check for Thickness of Pot in Bending-Bottom

Check for Thickness of Piston in Bending-Top

Stress into Lugs because of Horizontal Force

Check of Weld connection of stainless steel surface:

Neoprene Pad stress: Ref: Clause 926.2.3 of IRC:83(III)-2002

Rotaion check on pad ( Ref: clause 926.2.3.4 of IRC:83 (Part III)

Concrete stresses at pot base(Ref: clause 926.1.5 IRC:83 (Part III)

Conc. stresses at piston base:(clause 926.1.5 IRC:83 (Part III)

Stresses at Pot Wall cl 926.3.1.1.7 of IRC-83(III)

Pot internal Dia

Piston effective contact area diameter

(consider 1:2 dispersion from spiggot)

No of Lugs

Diameter of Piston

Neoprene Pad Thickness

Pot Base Thickness

Pot base effective dia (consider 1:2

dispersion from elastomer base)

Pot Projection beyond walls

Pot wall Depth >28mm

Pot wall thickness

Piston thickness above spigot

Pot External Dia

FIXED FREE

fy for the mild steel

PTFE size (dia)

Spigott Projection > 30mm

Bolt Dia

No of Bolts per component

Bolt flange thickness

No of sealing rings

Total thickness of ring

Shear strength of Bolt Gr 8.8

Axial Tensile strength, Bolts, Grp 8.8

Thickness of Lugs

Neoprene pad stress

OK

PTFE stress (working)

Steel stress (working) for design

Slide Stainless steel Plate (Thickness)

Slide Stainless steel Plate (Width)

PTFE size (thickness)

Height of Guide Bar

Width of Guide Bar

Length of piston flat

Neoprene Pad Size dia

Slide Stainless steel Plate (Length)

Clearance between top edge of pot wall and

bottom edge of piston

LONG_SLD TRNS_SLD

Vertical face of piston wall for contact with

pot internal wall

OK OK OK OK

OK OK OK


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Loading on Bearings:

per girder (i) Transverse Laoding (x-dirn) (ii) Longitudinal Loading

SF(KN) Force (KN)

= 352.12 Centrifugal Force 420.64 Breaking Force

= 320.09 251.85 Wind Force= 425.14 Seismic load 1982.75 Seismic Load

= 38.39 Hx_Non seismic 420.64 Hy_Nonsiesmic

Primary Loading (Total ) = 1135.74 Hx_Seismic/wind 918.61 Hy_siesmic/wind

= 67.661565.51

= 64.82

= 26.97

= 14.69

Summary

420.64

918.61

1135.74

1058.97

1222.84 Vvh

971.87

1220.86

973.85

A. Vertical Loading(Ref: Design sheet "Final

Stresses" for item 1,2,3,4 & "Other Loads"

for item 5(a,b),6

B. Horizontal Loading (Ref:Design

sheet "X-Frame Des"), on

complete deck

Ref: Design sheet: (Re

Sheet " Shear_Connec

on full deck

Dead Load reaction

H_Non seismic (KN)

Non seismic Case(DL+SIDL+LL) + CFv

(DL+SIDL+LL) -CFv

Seismic/ wind Case

(DL+SIDL+LL)+ CFv + (Vv+ 0.3*Vvh

)

Seismic

Load,

Vertical

Load due to vertical

Force

Load on Each

Pin/Metallic Guide

Load due to horizontal

Force

Superimposed Load reaction Wind loadLive Load

Centrifigal Load

H_Seismic (KN)

2. Vertical Loading_ on a Bearing (KN)

Wind

Load,

Vertical

Load due to vertical

ForceLoad due to horizontal

Force

1. Horizontal loading_Total (KN)

= Vertical Load due to effect of Hor

Horizontal/Seismic horizontal)

(DL+SIDL+LL) -CFv - (Vv + 0.3*Vvh)

(DL+SIDL+LL)+ CFv + (0.3*Vv+ Vvh)

(DL+SIDL+LL) - CFv - (0.3*Vv + Vvh

)


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Case1: Non Seismic Case ( (DL+SIDL+LL) + CFv )

V HX HY H/V Design Load V HX

A1 1135.74 0.00 39.23 3% 113.57425 A2 1135.74 0.00

B1 1135.74 0.00 39.23 3% 113.57425 B2 1135.74 0.00

C1(Fixed) 1135.74 105.16 39.23 10% 113.57425 C2 1135.74 105.1

D1 1135.74 105.16 39.23 10% 113.57425 D2 1135.74 105.1

E1 1135.74 0.00 39.23 3% 113.57425 E2 1135.74 0.00

F1 1135.74 0.00 39.23 3% 113.57425 F2 1135.74 0.00

V 1135.74 V 1135.74 V 1135.74 V 1135.74

Hx 106.41 Hx 0.00 Hx 113.57 Hx 0.00

Hy 39.69 Hy 0.00 Hy 0.00 Hy 113.57

Case2: Non Seismic Case ( (DL+SIDL+LL) -CFv )

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12


A1 1058.97 0.00 39.23 4% 105.89695 A2 1058.97 0.00

B1 1058.97 0.00 39.23 4% 105.89695 B2 1058.97 0.00C1(Fixed) 1058.97 105.16 39.23 11% OK C2 1058.97 105.1

D1 1058.97 105.16 39.23 11% OK D2 1058.97 105.1

E1 1058.97 0.00 39.23 4% 105.89695 E2 1058.97 0.00

F1 1058.97 0.00 39.23 4% 105.89695 F2 1058.97 0.00

V 1058.97 V 1058.97 V 1058.97 V 1058.97

Hx 105.16 Hx 0.00 Hx 105.90 Hx 0.00

Hy 39.23 Hy 0.00 Hy 0.00 Hy 105.90

Case3: Seismic Case- (( (DL+SIDL+LL)+ CFv + (Vv+ 0.3*Vvh ) ) + 0.3*Hx + 0.3*Hy)

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12


A1 1222.84 0.00 41.51 3% 122.28449 A2 1222.84 0.00

B1 1222.84 0.00 41.51 3% 122.28449 B2 1222.84 0.00

C1(Fixed) 1222.84 68.90 41.51 7% 122.28449 C2 1222.84 68.90

D1 1222.84 68.90 41.51 7% 122.28449 D2 1222.84 68.90

E1 1222.84 0.00 41.51 3% 122.28449 E2 1222.84 0.00

F1 1222.84 0.00 41.51 3% 122.28449 F2 1222.84 0.00

V 1222.84 V 1222.84 V 1222.84 V 1222.84

Hx 104.74 Hx 0.00 Hx 122.28 Hx 0.00

Hy 63.11 Hy 0.00 Hy 0.00 Hy 122.28

Case4: Seismic Case- (( (DL+SIDL+LL) -CFv - (Vv + 0.3*Vvh) ) + 0.3*Hx + 0.3*Hy)

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12

V HX

HY

H/V Design Load V HX

A1 971.87 0.00 41.51 4% 97.186705 A2 971.87 0.00

B1 971.87 0.00 41.51 4% 97.186705 B2 971.87 0.00

C1(Fixed) 971.87 68.90 41.51 8% 97.186705 C2 971.87 68.90

D1 971.87 68.90 41.51 8% 97.186705 D2 971.87 68.90

E1 971.87 0.00 41.51 4% 97.186705 E2 971.87 0.00

F1 971.87 0.00 41.51 4% 97.186705 F2 971.87 0.00

V 971.87 V 971.87 V 971.87 V 971.87

Hx 83.25 Hx 0.00 Hx 97.19 Hx 0.00

Hy 50.15 Hy 0.00 Hy 0.00 Hy 97.19

Free Bearing

Free Bearing Long. sliding Trans. sliding

Long. sliding Trans. sliding




Design of Bearing Fixed Bearing

Ist End of Girder II nd End of Girder


Design Load

No of Girders










Trans. sliding Free BearingFixed Bearing Long. sliding






Design Load

No of Girders




Design Load

No of Girders






Design of Bearing Fixed Bearing Free Bearing Long. sliding Trans. sliding








Design Load


5/47

Case5: Seismic Case- (( (DL+SIDL+LL)+ CFv + (0.3*Vv+ Vvh) ) + Hx + 0.3*Hy)

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12


A1 1220.86 0.00 41.51 3% 122.08583 A2 1220.86 0.00

B1 1220.86 0.00 41.51 3% 122.08583 B2 1220.86 0.00

C1(Fixed) 1220.86 229.65 41.51 19% OK C2 1220.86 229.65

D1 1220.86 229.65 41.51 19% OK D2 1220.86 229.65

E1 1220.86 0.00 41.51 3% 122.08583 E2 1220.86 0.00

F1 1220.86 0.00 41.51 3% 122.08583 F2 1220.86 0.00

V 1220.86 V 1220.86 V 1220.86 V 1220.86

Hx 229.65 Hx 0.00 Hx 229.65 Hx 0.00

Hy 41.51 Hy 0.00 Hy 0.00 Hy 122.09

Case6: Seismic Case- (( (DL+SIDL+LL) - CFv - (0.3*Vv + Vvh )) + Hx + 0.3*Hy)

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12


A1 973.85 0.00 41.51 4% 97.385361 A2 973.85 0.00

B1 973.85 0.00 41.51 4% 97.385361 B2 973.85 0.00C1(Fixed) 973.85 229.65 41.51 24% OK C2 973.85 229.65

D1 973.85 229.65 41.51 24% OK D2 973.85 229.65

E1 973.85 0.00 41.51 4% 97.385361 E2 973.85 0.00

F1 973.85 0.00 41.51 4% 97.385361 F2 973.85 0.00

V 973.85 V 973.85 V 973.85 V 973.85

Hx 229.65 Hx 0.00 Hx 229.65 Hx 0.00

Hy 41.51 Hy 0.00 Hy 0.00 Hy 97.39

Summary of Design Loads on Various Type of Bearings

V (KN)

Hx (KN)

Hy (KN)




No of Girders




Design Load

No of Girders






Design of Bearing Fixed Bearing Free Bearing Long. sliding Trans. sliding




Trans. sliding Free BearingFixed Bearing Long. sliding



Case6: Seismic Case

(( (DL+SIDL+LL) - CFv(0.3*Vv + Vvh )) + H

+ 0.3*Hy)

1135.74 1058.97 1222.84 971.87 1220.86 973.85

Design Load

Case1: Non Seismic

Case ( (DL+SIDL+LL) +

CFv )

Case2: Non Seismic Case( (DL+SIDL+LL) -CFv )

Case3: Seismic Case- ((

(DL+SIDL+LL)+ CFv +(Vv+ 0.3*Vvh ) ) +

0.3*Hx + 0.3*Hy)


(DL+SIDL+LL) -CFv - (Vv+ 0.3*Vvh) ) + 0.3*Hx

+ 0.3*Hy)

Case5: Seismic Case-

(( (DL+SIDL+LL)+ CFv +(0.3*Vv+ Vvh) ) + Hx +

0.3*Hy)

Forces on Fixed Bearing

39.69 39.23 63.11 50.15 41.51 41.51

106.41 105.16 104.74 83.25 229.65 229.65

Forces on Free Bearing


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V (KN)

Hx (KN)

Hy (KN)

V (KN)

Hx (KN)

Hy (KN)

V (KN)

Hx (KN)

Hy (KN)

Summary:

Fixed

Bearing

Max Value

non

seismic

Min Value

non

seismic

Max Value

seismic

Min Value

seismic

long_Slidin

g Bearing

Max Value

non

seismic

Min Value

non

seismic

Max Value

seismic

Min Value

seismic

V (KN) 1135.7 1059.0 1222.8 971.9 V (KN) 1135.7 1059.0 1222.8 971.9

Hx (KN) 106.4 105.2 229.7 83.2 Hx (KN) 113.6 105.9 229.7 97.2Hy (KN) 39.7 39.2 63.1 41.5 Hy (KN) 90.9 84.7 73.4 77.7

H_rsltnt 113.6 112.2 238.2 93.0 H_rsltnt 145.4 135.6 241.1 124.5

Free

Bearing

Max Value

non

seismic

Min Value

non

seismic

Max Value

seismic

Min Value

seismic

trns_slidin

g Bearing

Max Value

non

seismic

Min Value

non

seismic

Max Value

seismic

Min Value

seismic

V (KN) 1135.7 1059.0 1222.8 971.9 V (KN) 1135.7 1059.0 1222.8 971.9

Hx (KN) 90.9 84.7 73.4 73.4 Hx (KN) 90.9 84.7 73.4 77.7

Hy (KN) 90.9 84.7 73.4 73.4 Hy (KN) 113.6 105.9 122.3 97.2

H_rsltnt 128.5 119.8 103.8 103.8 H_rsltnt 145.4 135.6 142.6 124.5

Case1: Non Seismic


CFv )

Case2: Non Seismic Case

( (DL+SIDL+LL) -CFv )


(DL+SIDL+LL)+ CFv +

(Vv+ 0.3*Vvh ) ) +

0.3*Hx + 0.3*Hy)


(DL+SIDL+LL) -CFv - (Vv

+ 0.3*Vvh) ) + 0.3*Hx

+ 0.3*Hy)


(( (DL+SIDL+LL)+ CFv +

(0.3*Vv+ Vvh) ) + Hx +

0.3*Hy)

Case6: Seismic Case

(( (DL+SIDL+LL) - CFv

(0.3*Vv + Vvh )) + H

+ 0.3*Hy)

1135.74 1058.97 1222.84 971.87 1220.86 973.85

0.00 0.00 0.00 0.00 0.00 0.00

0.00 0.00 0.00 0.00 0.00 0.00

Forces on Long Sliding Bearing

Case1: Non Seismic


CFv )




(DL+SIDL+LL)+ CFv +

(Vv+ 0.3*Vvh ) ) +

0.3*Hx + 0.3*Hy)



+ 0.3*Vvh) ) + 0.3*Hx

+ 0.3*Hy)



(0.3*Vv+ Vvh) ) + Hx +

0.3*Hy)

Case6: Seismic Case


(0.3*Vv + Vvh )) + H

+ 0.3*Hy)

1135.74 1058.97 1222.84 971.87 1220.86 973.85

113.57 105.90 122.28 97.19 229.65 229.65

0.00 0.00 0.00 0.00 0.00 0.00

Forces on Transverse Sliding Bearing

Case1: Non SeismicCase ( (DL+SIDL+LL) +

CFv )




(DL+SIDL+LL)+ CFv +

(Vv+ 0.3*Vvh ) ) +

0.3*Hx + 0.3*Hy)



+ 0.3*Vvh) ) + 0.3*Hx

+ 0.3*Hy)



(0.3*Vv+ Vvh) ) + Hx +

0.3*Hy)

Case6: Seismic Case


(0.3*Vv + Vvh )) + H

+ 0.3*Hy)

1135.74 1058.97 1222.84 971.87 1220.86 973.85

0.00 0.00 0.00 0.00 0.00 0.00

113.57 105.90 122.28 97.19 122.09 97.39


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DESIGN OF FIXED BEARING :

40 40

40

40

a. Design Inputs:

= 224 mm

= 20 mm OK Ref : Cl 926.2.3.6 of IRC83(III)

= 40 mm

= 384 mmCl 926.3.1.1.6.1 of IRC83(III)

= 224 mm

= 40 mm= 40 mm

= 35 mm

=362

mm

= 43 mm

= 28 mm

= 8 mm

= 12 mm

= 2 Nos 10 43

= 4 mm

= 10 mm8 mm

40 20

= 8 mm

= 250

= 35 Mpa Cl 926.2.3.2 of IRC-83(III)

= 40 Mpa Cl 926.2.4.3 of IRC-83(III)


Design of Fixed Bearing

= 0.0 mm

= 0.0 mm

= 0.00566 Radians

= 0.00342 Radians Cl 926.1.6 of IRC-83(III)


C. Calculation for permissible stresses in pedestal concrete & bottom flange:

= M 40

= 10 As per cl 926.2.1.1 of IRC-83(III)

The projection of the adjacent structure beyond the loaded area shall NOT be less than 150mm

Bottom:

= 224 mm

= 39408.138 mm2

= 304 mm Cl 926.2.1.1 of IRC-83(III)

= 72583.357 mm2

= 13.57 Mpa

Top:

= 187.5 Mpa



Pot Base Thickness




Bolt Dia



No of sealing rings


Pot Internal Dia

Pot wall Depth >28mmPot wall thickness






Vertical face of piston wall for contact with

pot internal wall < 20 mmfy for the mild steel

Longitudinal movement

Transverse movement

Rotation (total)

Rotation (Permanent actions) WL2/(24EI)

Rotation (Variable actions) WL2/(24EI)

Neoprene pad stress

Dia after dispersion(1:2)

Dispersion Area A1

Permissible concrete stress

=0.25fck (A1/A2)



Grade of concrete for Pedestal

Permissible direct compressive Stress in

concrete= 0.25* fck

Dia of loaded area

Loaded Area A2

Permissible bearing stress in

bottom flange (= 0.75*fy)

Dispersion of 1(V) :2(H)

Fig 5 of IRC 83(iii)

Pot Depth

Pot Wall thck

Pedestal

Bearing

Pot

Neoprene pad

Spigot projection

pad thk


8/47

d. Neoprene Pad stress: Ref: Clause 926.2.3 of IRC:83(III)-2002

Max Min max Min

= 28.83 26.89 31.05 24.67

= 35.00 35.00 35.00 35.00

= 5.00 5.00 5.00 5.00 Ref : clause 926.2.3.3 of IRC:83(Part -III)

OK OK OK OK OK


= 0.0057 Radians

= 0.63 mm

= 16.00 mm

Check OK

Concentrated stresses at pot base (at concrete pedastal):

Max Min max Min

= 9.81 9.14 10.56 8.39

= 13.57 13.57 16.96 16.96 cl 926.2.1.4 of IRC-83(III)

= 0.72 0.67 0.62 0.49 OK

Maximum Permissible Average

stress (Mpa)

Ref : clause 926.2.3.2 and clause 926.2.3.5 of

IRC:83(Part -III)

Minimum Permissible Average

stress (Mpa)

Rotaiton of pad

Deforamtion of pad due to

rotation

he,eff (as per Figure)

Non-Seismic Seismic

Actual Stress (Mpa)

i)

Direct Bearing Stress due to Vertical Load (Mpa)

Direct Bearing Stress

Permissible stress (Mpa)

Actual : PermissibleIncrease by 25% when wi

earthquake taken into acc

As per Clause 926.1.5: For design of bearings or part thereof and the adjacent structures the resultant of the coexisting moments

prodeiced due to design horizontal force and that induced due to resistance to rotation shall be considered.

Non-Seismic Seismic

he,effhe

< he,eff * 0.15


9/47

= 64.00 64.00 64.00 64.00

= 1.31 1.29 2.74 1.07

iii)

= 224.00 224.00 224.00 224.00

= 20.00 20.00 20.00 20.00

= 11.20 11.20 11.20 11.20

= 1.64 1.64 1.64 1.64

= 0.0034 0.0034 0.0034 0.0034

= 39.93 39.93 39.93 39.93

= 0.0022 0.0022 0.0022 0.0022

= 1.07 1.07 1.07 1.07

Ref: Cl 926.1.5.2 of IRC-83(III)

= 112.00 112.00 112.00 112.00

= 113.57 112.24 238.17 93.02

= 2.54 2.51 5.33 2.08

iii-3) = 3.61 3.58 6.40 3.15

iii-4) = 0.65 0.64 1.15 0.57

= 1.96 1.94 3.89 1.64

= 13.20 13.20 16.50 16.50 Ref: Cl 926.2.1.2 & Cl 926.2.1.4 of IRC-83(III)

= 0.15 0.15 0.24 0.10 OK

= 11.76 11.08 14.45 10.03

= 13.57 13.57 16.96 16.96 cl 926.2.1 & cl 926.2.1.4 of IRC-83(III)

= 0.87 0.82 0.85 0.59 OK

= Ref: Cl 926.2.1.3 of IRC-83(III)

= 0.87 0.82 0.86 0.59 OK OK

Concentrated stresses at piston base : Ref: Cl 926.1.5 of IRC-83(III)

Max Min max Min

= 110.35 102.89 118.81 94.43

= 187.50 187.50 187.50 187.50 Cl 926.2.2.4 & cl 926.2.2.6 of IRC-83(I II )

= 0.59 0.55 0.63 0.50 OK

= 74.00 74.00 74.00 74.00

= 1.80 1.78 3.78 1.48

iii)


= 224.00 224.00 224.00 224.00

= 20.00 20.00 20.00 20.00

= 11.20 11.20 11.20 11.20

= 1.64 1.64 1.64 1.64

= 0.003 0.003 0.003 0.003

= 39.933 39.933 39.933 39.933

= 0.002 0.002 0.002 0.002

= 1.07 1.07 1.07 1.07


= 112.00 112.00 112.00 112.00

= 113.57 112.24 238.17 93.02

= 2.54 2.51 5.33 2.08

iii-3) = 3.61 3.58 6.40 3.15

ii)

Flexural Stress due to active Moment resulting from acting Horizontal Forces

eccentricity (mm), From the

bottom of bearing

Flexural Stress (Mpa)

Flexural Stress due to induced Moment resulting from resistance to rotation due to the

effect of tilting stiffness of elastomeric pressure pad

iii-1)

Me.d = di3

* (k1.p k2.v) Ref: Cl 926.1.5.1 of IRC-83(III)

di (dia of elastomeric pad, mm)

he (thickness of confined

elastomeric pressure pad,mm)

Horizontal force acts at the

center line of bearing

H (KN)

MR.d (KN-m)

di/he

k1

p (radians)

k2

v (radians)

Me.d (KN-m)

Total induced moment

= Me,d + MR,d (KN-m)

Stress (Mpa)

iii-5)

Total flexural Stress (Mpa)


Actual : Permissible

iii-2)

MR.d = 0.2*C*H

C (mm), Perpendicular distance

from the point of action of

horizontal force on cylinde wall

to the axis of rotation

Non-Siesmic Siesmic

i


Direct Bearing Stress due to

Vertical Load (Mpa)

Permissible Stress (Mpa)

Actual:Permissible

iii-6)

Total Stress (Mpa)



iv)Coexisting Direct & Flexural

Stress Ratio > 1

ii)

Flexural Stress due to active Moment resulting from acting horizontal forces

eccentricity (mm)

Stress (Mpa)

Stress due to induced moment from resistance to rotation

iii-1)

Me.d = di3

* (k1.p k2.v)

di (dia of elastomer pad, mm)


elastomeric pressure pad in mm)

di/he

Total induced moment = Me.d +

MR.d (KN-m)

k1

p (radians)

k2

v (radians)

Me.d (KN-m)

iii-2)

MR.d = 0.2*C*H

C (mm)

H (KN)

MR.d (KN-m)


10/47

iii-4) = 0.78 0.77 1.37 0.68

= 2.58 2.55 5.16 2.15

= 165.00 165.00 165.00 224.40 Cl 926.2.2.2 & cl 926.2.2.6 of IRC-83(III)

= 0.02 0.02 0.03 0.01 OK

= 112.93 105.44 123.97 96.58

= 187.50 187.50 187.50 187.50 Cl 926.2.2.4 & cl 926.2.2.6 of IRC-83(III)

= 0.60 0.56 0.66 0.52 OK

Cl 926.2.2.5 of IRC-83(III)

191.15 178.23 205.85 163.57

225.00 225.00 225.00 225.00 Cl 926.2.2.5 of IRC-83(III)

0.850 0.792 0.915 0.727 OK OK


Max Min max Min

i) 129.18 120.45 139.09 110.54 Cl 926.3.1.1.7.1 (i) of IRC-83(III)

ii) 40.37 37.64 43.46 34.54 Cl 926.3.1.1.7.1 (ii) of IRC-83(III)

iii)-a 113.57 112.24 238.17 93.02

iii)-b35.49 35.07 74.43 29.07

iv) 75.86 72.71 117.89 63.61

v) 204.00 204.00 204.00 204.00 Cl 926.2.2 of IRC-83(III)

vi) 0.37 0.36 0.58 0.31 OK

i) 14.42 13.44 15.52 12.34

ii) 19.01 18.79 39.87 15.57

33.43 32.23 55.39 27.91

153.00 153.00 153.00 153.00 Cl 926.2.2.3 of IRC-83(III)

0.22 0.21 0.36 0.18 OK

i) 21.63 20.16 23.28 18.51

ii) 68.45 67.64 143.54 56.06

90.07 87.81 166.82 74.57

224.40 224.40 224.40 224.40 Cl 926.2.2.2 of IRC-83(III)

0.40 0.39 0.74 0.33 OK

107.08 104.05 192.45 88.87306 306 306 306 Cl 926.2.2.5 of IRC-83(III)

0.35 0.34 0.63 0.29 OK OK


Max Min max Min

i) 1135.74 1058.97 1222.84 971.87

ii) 384.00 384.00 384.00 384.00

iii)1.16E+05 1.16E+05 1.16E+05 1.16E+05

iv) 9.81 9.15 10.56 8.40

v) 224.00 224.00 224.00 224.00

vi) 80.00 80.00 80.00 80.00

vii) 31397.69 29275.30 33805.65 26867.34

viii)28.97 27.98 30.06 26.80

stress = BM*6/(b*d2)=0.66*

ix) 40.00 40.00 40.00 40.00

OK OK OK OK OK

Stress (Mpa)

iii-5)


Permissible stress (0.66fy) (Mpa)


Actual:Permissible

Non-Siesmic Siesmic

Check of Hoop Tensile stress

Force from pad (KN per I section of ring)

Pressure from Pad (P1) (Mpa)

iii-6)

Total Stress (Mpa)



iv)

Coexisting Direct & Flexural Stress Check

Combined Stresses (Mpa)


Fluid Pressure (P1) Mpa

Horizontal Force (P2) Mpa

Total Shear Stress P = P1 + P2 (Mpa)

Permissible Stress (0.45fy)


Bending Stress at cylinder & base interface considering 1mm slice

Total horizontal force into wall (KN)

Total horizontal stress into wall due to

horizontal force (P2) (Mpa)

Total P = P1 + P2 (Mpa)

Permissible stress (0.6fy) (Mpa)Actual:Permissible

Shear stress at cylinder & base interface considering 1mm slice



Total Bending Stress (Mpa) P1 + P2



iii) Combined Stress (Mpa)Permissible Stress (0.9fy) Mpa


Non-Siesmic Siesmic

Max Vertical Load (KN)

Pot Base effective Contact Dia (mm)

Effective area of the Plate in contact to

concrete (mm2)

Stress on Plate (N/mm2)

Dia of loaded area (mm)

Projection of pot (mm)

Bending Moment at Top (N-mm)

Thickness of top plate required to cater tothis BM (mm)

Provided thickness (mm)

Pot

Neoprene pad


11/47


Max Min max Min

i) 1135.74 1058.97 1222.84 971.87

ii) 362.00 362.00 362.00 362.00

iii)1.03E+05 1.03E+05 1.03E+05 1.03E+05

iv) 11.04 10.29 11.89 9.45

v) 224.00 224.00 224.00 224.00

vi) 69.00 69.00 69.00 69.00

vii) 2.63E+04 2.45E+04 2.83E+04 2.25E+04

viii)26.51 25.60 27.51 24.52

ix) 35.00 35.00 35.00 35.00

OK OK OK OK OK

Miscellaneous Design Checks:

Rotation Capacity cl 926.2.3 of IRC-83(III)

i)

16.00 mm

2.40 mm

ii) Cl 926.2.3.4 of IRC-83(III)

0.02 radians >= 0.0057 radians

OK

Check on Piston rotaion gap: Ref: Clause 926.3.1.4 of IRC:83 (Part III)-2002

10.00 mm

0.0057 radians

9.14 mm

OK

Diameter & Thickness checks cl 926.2.3.6 of IRC-83(III)

ii) 20.00 mm > 16 mm

OK cl 926.2.3.6 of IRC-83(III)iii) 224.00 mm > 180 mm

OK cl 926.2.3.6 of IRC-83(III)

SiesmicNon-Siesmic

gap after rotation

Check compression at edge of neoprene pad 15% of T1

Projection of piston (mm)

T1 = thickness of pad less seal rings thickness

Rotation (Radius)



Rotaion

Thickness of pad

Dia of pad



Thickness of top plate required to cater to

this BM (mm)


Effective Dia of Piston (mm)

Effective area of the Top Plate in contact to

steel/concrete (mm2)

Stress at Top Plate (N/mm)



12/47


i) 4.09 mm


13/47


Max Min max Min

i) 113.57 112.24 238.17 93.02

ii) 84.00 84.00 84.00 84.00

iii) 20.00 20.00 20.00 20.00

iv) 1680.00 1680.00 1680.00 1680.00

v) 8.00 8.00 8.00 8.00

vi) 14.20 14.03 29.77 11.63vii) 8.45 8.35 17.72 6.92

viii) 153.00 153.00 153.00 153.00

ix) 0.06 0.05 0.12 0.05 OK

Non-Siesmic Siesmic


Total horizontal force on bearing (KN)

Effective length of lug taking shear (mm)

Thickness of lug (mm)

Total cross sectional area of each lug (mm2)

No. of lugs in each bearing

Horizontal force on each lug (KN)Stress on lug due to Horz. Force (Mpa)



14/47

BEARING DESIGN :

40 40

40

40

a. Design Inputs:

= 224 mm


= 40 mm

=384

mmCl 926.3.1.1.6.1 of IRC83(III)

= 224 mm

= 40 mm

= 40 mm

= 35 mm

=362

mm

= 43 mm

= 28 mm

= 8 mm

= 12 mm

= 2 Nos 10 43

= 4 mm

= 10 mm8 mm

40 20

= 8 mm

= 224 mm = 4.5 mm Thk>=4.5 mm Ref: Table 4 of IRC:83 (Part-III)-2002

= 28 mm

= 50 mm

= 312 mm

= 350 mm OK

= 350 mm OK

= 36 mm

= 35 Mpa Cl 926.2.3.2 of IRC-83(III)

= 40 Mpa Cl 926.2.4.3 of IRC-83(III)


= 250 Mpa

b. Design Requirements

= 21.798 mm= 5.449411 mm

= 0.00566 Radians




= M 40



Bottom:

= 224 mm

= 39408.138 mm2

= 304 mm Cl 926.2.1.1 of IRC-83(III)

= 72583.357 mm2



Pot Base Thickness




Bolt Dia



No of sealing rings


Neoprene pad stress

Pot Internal Dia


Pot wall thickness






Height of Guide Bar

Width of Guide Bar






Vertical face of piston wall


PTFE size (dia)





concrete= 0.25* fck

Dia of loaded area

Loaded Area A2

Transverse movement

Rotation (total)




Dispersion Area A1




Pot Depth

Pot Wall thck

Pedestal

Bearing

Pot

Neoprene pad

Spigot projection

pad thk


15/47


Max Min max Min

= 28.83 26.89 31.05 24.67

= 35.00 35.00 35.00 35.00


OK OK OK OK OKRotaion check on pad ( Ref: clause 926.2.3.4 of IRC:83 (Part III)

= 0.0057 Radians

= 0.63 mm

= 16.00 mm

Check OK

PTFE stress

28.82 26.87 31.03 24.66

40.00 40.00 40.00 40.00 Ref: Cluse 926.2.4.3 & 926.2.4.4 of IRC-83(III)

0.72 0.67 0.78 0.62 OK

Coeffecient of friction (): Ref: Table 5 of IRC:83 (part-III)-2002

Ref: Clause 926.2.4.2 of IRC:83 (Part-III)-2002

Max Min max Min

= 28.82 26.87 31.03 24.66

= 0.08 0.08 0.06 0.08

Concentrated stresses at pot base:(At concrete pedastal)

Max Min max Min

= 9.81 9.14 10.56 8.39

= 13.57 13.57 16.96 16.96 cl 926.2.1.4 of IRC-83(III)

= 0.72 0.67 0.62 0.49 OK


IRC:83(Part -III)


stress (Mpa)

Rotaiton of pad


rotation


Non-Seismic Seismic

Actual Stress (Mpa)


stress (Mpa)

i)




Actual : PermissibleIncrease by 25% when wi

earthquake taken into acc

Actual (Mpa)

Permissible (Mpa)

Ratio Actual:Permissible



Non-Seismic Seismic

Maximum Design

Coeffecient of friction

5 0.08 0.16

10 0.06 0.12

Non-Siesmic Siesmic

Average Pressure on PTFE (Mpa)

Coeffecient of friction ()

20

Average Pressure on confined

PTFE (Mpa)

Maximum


0.04 0.08

more than 30 0.03 0.06

he,effhe

< he,eff * 0.15


16/47

= 64.00 64.00 64.00 64.00

= 1.48 1.38 1.19 1.19

iii)

= 224.00 224.00 224.00 224.00

= 20.00 20.00 20.00 20.00

= 11.20 11.20 11.20 11.20

= 1.64 1.64 1.64 1.64

= 0.0034 0.0034 0.0034 0.0034

= 39.93 39.93 39.93 39.93

= 0.0022 0.0022 0.0022 0.0022

= 1.07 1.07 1.07 1.07


= 112.00 112.00 112.00 112.00

= 128.49 119.81 103.76 103.76

= 2.88 2.68 2.32 2.32

iii-3) = 3.95 3.75 3.39 3.39

iii-4) = 0.71 0.68 0.61 0.61

= 2.19 2.05 1.80 1.80


= 0.17 0.16 0.11 0.11 OK

= 12.00 11.20 12.36 10.20

= 13.57 13.57 16.96 16.96 cl 926.2.1 & cl 926.2.1.4 of IRC-83(III)

= 0.88 0.83 0.73 0.60 OK

= Ref: Cl 926.2.1.3 of IRC-83(III)

= 0.89 0.83 0.73 0.60 OK OK

Concentrated stresses at piston base: Ref: Cl 926.1.5 of IRC-83(III)

Max Min max Min

= 110.35 102.89 118.81 94.43

= 187.50 187.50 187.50 187.50 Cl 926.2.2.4 & cl 926.2.2.6 of IRC-83(I II )

= 0.59 0.55 0.63 0.50 OK

= 74.00 74.00 74.00 74.00

= 2.04 1.90 1.65 1.65

iii)


= 224.00 224.00 224.00 224.00

= 20.00 20.00 20.00 20.00

= 11.20 11.20 11.20 11.20

= 1.64 1.64 1.64 1.64

= 0.003 0.003 0.003 0.003

= 39.933 39.933 39.933 39.933

= 0.002 0.002 0.002 0.002

= 1.07 1.07 1.07 1.07


= 112.00 112.00 112.00 112.00

= 128.49 119.81 103.76 103.76

= 2.88 2.68 2.32 2.32

iii-3) = 3.95 3.75 3.39 3.39

ii)



bottom of bearing




iii-1)

Me.d = di3







H (KN)

MR.d (KN-m)

di/he

k1

p (radians)

k2

v (radians)

Me.d (KN-m)



Stress (Mpa)

iii-5)




iii-2)

MR.d = 0.2*C*H





Non-Siesmic Siesmic

i



Vertical Load (Mpa)


Actual:Permissible

iii-6)

Total Stress (Mpa)




Stress Ratio > 1

ii)


eccentricity (mm)

Stress (Mpa)


iii-1)

Me.d = di3

* (k1.p k2.v)




di/he

k1

p (radians)

k2

v (radians)

Me.d (KN-m)

iii-2)

MR.d = 0.2*C*H

C (mm)

H (KN)

MR.d (KN-m)


MR.d (KN-m)


17/47

iii-4) = 0.85 0.81 0.73 0.73

= 2.89 2.71 2.38 2.38

= 165.00 165.00 165.00 165.00 Cl 926.2.2.2 & cl 926.2.2.6 of IRC-83(III)

= 0.02 0.02 0.01 0.01 OK

= 113.24 105.60 121.19 96.80

= 187.50 187.50 187.50 187.50 Cl 926.2.2.4 & cl 926.2.2.6 of IRC-83(III)

= 0.60 0.56 0.65 0.52 OK

Cl 926.2.2.5 of IRC-83(III)

191.15 178.23 205.80 163.57

225.00 225.00 225.00 225.00 Cl 926.2.2.5 of IRC-83(III)

0.850 0.792 0.915 0.727 OK OK


Max Min max Min

i) 129.18 120.45 139.09 110.54 Cl 926.3.1.1.7.1 (i) of IRC-83(III)

ii) 40.37 37.64 43.46 34.54 Cl 926.3.1.1.7.1 (ii) of IRC-83(III)

iii)-a 128.49 119.81 103.76 103.76

iii)-b40.15 37.44 32.43 32.43

iv) 80.52 75.08 75.89 66.97

v) 204.00 204.00 204.00 204.00 Cl 926.2.2 of IRC-83(III)

vi) 0.39 0.37 0.37 0.33 OK

i) 14.42 13.44 15.52 12.34

ii) 21.51 20.06 17.37 17.37

35.93 33.50 32.89 29.71

153.00 153.00 153.00 153.00 Cl 926.2.2.3 of IRC-83(III)

0.23 0.22 0.21 0.19 OK

i) 21.63 20.16 23.28 18.51

ii) 77.44 72.21 62.54 62.54

99.07 92.37 85.82 81.04

224.40 224.40 224.40 224.40 Cl 926.2.2.2 of IRC-83(III)

0.44 0.41 0.38 0.36 OK

116.99 109.08 103.01 96.00306 306 306 306 Cl 926.2.2.5 of IRC-83(III)

0.38 0.36 0.34 0.31 OK OK


Max Min max Min

i) 1135.74 1058.97 1222.84 971.87

ii) 384.00 384.00 384.00 384.00

iii)1.16E+05 1.16E+05 1.16E+05 1.16E+05

iv) 9.81 9.15 10.56 8.40

v) 224.00 224.00 224.00 224.00

vi) 80.00 80.00 80.00 80.00

vii) 31397.69 29275.30 33805.65 26867.34

viii)28.97 27.98 30.06 26.80

stress = BM*6/(b*d2)=0.66*

ix) 40.00 40.00 40.00 40.00

OK OK OK OK OK


Actual:Permissible

Non-Siesmic Siesmic

iii-6)

Total Stress (Mpa)



Stress (Mpa)

iii-5)






iv)





Siesmic







Actual:Permissible










concrete (mm2)



Non-Siesmic











Pot

Neoprene pad


18/47


Max Min max Min

i) 1135.74 1058.97 1222.84 971.87

ii) 362.00 362.00 362.00 362.00

iii)1.03E+05 1.03E+05 1.03E+05 1.03E+05

iv) 11.04 10.29 11.89 9.45

v) 224.00 224.00 224.00 224.00

vi) 69.00 69.00 69.00 69.00

vii) 2.63E+04 2.45E+04 2.83E+04 2.25E+04

viii)26.51 25.60 27.51 24.52

ix) 35.00 35.00 35.00 35.00

OK OK OK OK OK



i)

16.00 mm

2.40 mm

ii) Cl 926.2.3.4 of IRC-83(III)


OK


10.00 mm

0.0057 radians

9.14 mm

OK

Diameter & Thickness checks cl 926.2.3.6 of IRC-83(III)ii) 20.00 mm > 16 mm


iii) 224.00 mm > 180 mm


Siesmic


Non-Siesmic


gap after rotation

Thickness of pad

Dia of pad

Check compression at edge of neoprene pad



this BM (mm)


15% of T1


Rotation (Radius)



Rotaion







19/47


i) 5.57 mm

31.80 mm OK

iv) = 63.00 mm > 15.45 mm OK

Stress in Guide Bar cl 926.3.5.5 of IRC-83(III)

Max Min max Min

8.24 7.68 6.65 6.65

112.50 112.50 112.50 112.50 cl 926.2.2.3 of IRC-83(III)

0.07 0.07 0.06 0.06 OK

22.50 22.50 22.50 22.50

2891.13 2525.36 5358.75 2092.96

22.24 19.43 41.22 16.10

165.00 165.00 165.00 165.00 cl 926.2.2.2 of IRC-83(III)

0.13 0.12 0.25 0.10 OK

26.42 23.54 42.80 19.80

225.00 225.00 225.00 225.00 cl 926.2.2.5 of IRC-83(III)

0.12 0.10 0.19 0.09 OK


= 128.5 119.8 103.8 110.0

= 110.0 110.0 110.0 110.0 Clause 926.2.6.1 of IRC:83(Part III )-2002

= 1.19 1.11 0.96 1.01

= 36.00 36.00 36.00 36.00

OK OK OK OK OK

Ref: Clause 926.3.1.5 of IRC:83 (Part - III)-2002


Max Min max Min

i) 128.49 119.81 103.76 103.76

ii) 84.00 84.00 84.00 84.00

iii) 20.00 20.00 20.00 20.00

iv) 1680.00 1680.00 1680.00 1680.00

v) 8.00 8.00 8.00 8.00

vi) 16.06 14.98 12.97 12.97

vii) 9.56 8.91 7.72 7.72

viii) 153.00 153.00 153.00 153.00

ix) 0.06 0.06 0.05 0.05 OK

Size of weld with Bottom Flange:

Non-Siesmic

Total horizontal force acting (KN)

ii)

Contribution to resistance by bolts (F1)

No. of bolts used

Bolt Diameter(mm)

Cross Sectional Area of one Bolt (mm2)

Total cross sectional area of bolts (mm2)


Total Shear Force Offered By the Bolts (F1)

Siesmic

i)

Shear Stress (Mpa)

Permissible Stress (0.45fy) (Mpa)

Actual:Permissible

Siesmic

Effective contact Width of pistton and pot

We = 1.3*(Seismic H Load)*1000/((Pot dia -

1.5) * 0.75fy)

iii)

Combined stress at top plate-guide bar


Actual:Permissible

Stress on lug due to Horz. Force (Mpa)



Movement possible in long direction

Movement possible in lateral direction

Non-Siesmic Siesmic






Horizontal force on each lug (KN)

Non-Siesmic Siesmic

ii)

Flexural StressEccentricity (mm)

Moment (M) (KN-mm)

Flexural stress = M/(LH2/6) (Mpa)


Actual:Permissible

Non-Siesmic

Thicknes of stainless plate (mm)

i)

Slide Plate dimension used:

Length

Width

Induced horizontal force due to friction(KN)

Permissible stress of weld(Mpa)

Weld size (mm), assuming welding is done in

full periphery

Preset in longitudinal direction


20/47


21/47

BEARING DESIGN :

40 40

40

40

a. Design Inputs:

= 224 mm


= 40 mm

= 384 mmCl 926.3.1.1.6.1 of IRC83(III)

= 224 mm

= 40 mm

= 40 mm

= 35 mm

= 362 mm

= 43 mm

= 28 mm

= 8 mm

= 12 mm

= 2 Nos 10 43

= 4 mm

= 10 mm8 mm

40 20

= 8 mm

= 224 mm

= 4.5 mm Thk>=4.5 mm Ref: Table 4 of IRC:83 (Part- III)-2002

= 28 mm

= 50 mm

= 312 mm

= 350 mm OK

= 350 mm NA

= 36 mm

= 35 Mpa Cl 926.2.3.2 of IRC-83(III)

= 40 Mpa Cl 926.2.4.3 of IRC-83(III)


= 250


= 21.79764 mm

= 0.00000 mm

= 0.00566 Radians




= M 40



Bottom:

= 224 mm

= 39408.138 mm2

= 304 mm Cl 926.2.1.1 of IRC-83(III)

72583 357 mm2



Pot Base Thickness




Bolt Dia



No of sealing rings


Neoprene pad stress

Pot Internal Dia


Pot wall thickness






Height of Guide Bar

Width of Guide Bar








PTFE size (dia)





concrete= 0.25* fck

Dia of loaded area

Loaded Area A2

Transverse movement

Rotation (total)




Dispersion Area A1




Pot Depth

Pot Wall thck

Pedestal

Bearing

Pot

Neoprene pad

Spigot projectio

pad thk


22/47


Max Min max Min

= 28.83 26.89 31.05 24.67

= 35.00 35.00 35.00 35.00


OK OK OK OK OK


= 0.0057 Radians

= 0.63 mm

= 16.00 mm

Check OK

PTFE stress

28.82 26.87 31.03 24.66

40.00 40.00 40.00 40.00 Ref: Cluse 926.2.4.3 & 926.2.4.4 of IRC-83(III)0.72 0.67 0.78 0.62 OK



Max Min max Min

= 28.82 26.87 31.03 24.66

= 0.08 0.08 0.06 0.08

Concentrated stresses at pot base:(At concrete pedastal)

Max Min max Min

= 9.81 9.14 10.56 8.39

= 13.57 13.57 16.96 16.96 cl 926.2.1.4 of IRC-83(III)

= 0.72 0.67 0.62 0.49 OK

Ref : c lause 926.2.3.2 and clause 926.2.3.5 of

IRC:83(Part -III)


stress (Mpa)

Rotaiton of pad


rotation


Non-Seismic Seismic

Actual Stress (Mpa)


stress (Mpa)

i)




Actual : PermissibleIncrease by 25% when w

earthquake taken into ac

Actual (Mpa)

Permissible (Mpa)Ratio Actual:Permissible



Non-Seismic Seismic

Maximum Design


5 0.08 0.16

10 0.06 0.12

Non-Siesmic Siesmic



20


PTFE (Mpa)

Maximum


0.04 0.08

more than 30 0.03 0.06

he,effhe

< he,eff * 0.15


23/47

= 64.00 64.00 64.00 64.00

= 1.67 1.56 2.77 1.43

iii)

= 224.00 224.00 224.00 224.00

= 20.00 20.00 20.00 20.00

= 11.20 11.20 11.20 11.20

= 1.64 1.64 1.64 1.64

= 0.0034 0.0034 0.0034 0.0034

= 39.93 39.93 39.93 39.93

= 0.0022 0.0022 0.0022 0.0022

= 1.07 1.07 1.07 1.07


= 112.00 112.00 112.00 112.00

= 145.45 135.61 241.09 124.46

= 3.26 3.04 5.40 2.79

iii-3) = 4.33 4.11 6.47 3.86

iii-4) = 0.78 0.74 1.16 0.69

= 2.45 2.30 3.94 2.13


= 0.19 0.17 0.24 0.13 OK

= 12.26 11.44 14.50 10.52

= 13.57 13.57 16.96 16.96 cl 926.2.1 & cl 926.2.1.4 of IRC-83(III)

= 0.90 0.84 0.85 0.62 OK

= Ref: Cl 926.2.1.3 of IRC-83(III)

= 0.91 0.85 0.86 0.62 OK OK


Max Min max Min

= 110.35 102.89 118.81 94.43

= 187.50 187.50 187.50 187.50 Cl 926.2.2.4 & cl 926.2.2.6 of IRC-83(I II)

= 0.59 0.55 0.63 0.50 OK

= 74.00 74.00 74.00 74.00

= 2.31 2.15 3.83 1.98

iii)


= 224.00 224.00 224.00 224.00

= 20.00 20.00 20.00 20.00

= 11.20 11.20 11.20 11.20

= 1.64 1.64 1.64 1.64

= 0.003 0.003 0.003 0.003

= 39.933 39.933 39.933 39.933

= 0.002 0.002 0.002 0.002

= 1.07 1.07 1.07 1.07


= 112.00 112.00 112.00 112.00

= 145.45 135.61 241.09 124.46

= 3.26 3.04 5.40 2.79

iii-3) = 4.33 4.11 6.47 3.86

ii)



bottom of bearing




iii-1)

Me.d = di3


di(dia of elastomeric pad, mm)





H (KN)

MR.d (KN-m)

di/he

k1

p (radians)

k2

v (radians)

Me.d (KN-m)



Stress (Mpa)

iii-5)




iii-2)

MR.d = 0.2*C*H





Non-Siesmic Siesmic

i



Vertical Load (Mpa)


Actual:Permissible

iii-6)

Total Stress (Mpa)




Stress Ratio > 1

ii)


eccentricity (mm)

Stress (Mpa)


iii-1)

Me.d = di3

* (k1.p k2.v)




di/he

k1

p (radians)

k2

v (radians)

Me.d (KN-m)

iii-2)

MR.d = 0.2*C*H

C (mm)

H (KN)

MR.d (KN-m)

Total induced moment = Me.d +MR.d (KN-m)


24/47

iii-4) = 0.93 0.88 1.39 0.83

= 3.24 3.04 5.22 2.81

= 165.00 165.00 165.00 165.00 Cl 926.2.2.2 & cl 926.2.2.6 of IRC-83(III)

= 0.02 0.02 0.03 0.02 OK

= 113.59 105.93 124.03 97.23

= 187.50 187.50 187.50 187.50 Cl 926.2.2.4 & cl 926.2.2.6 of IRC-83(III)

= 0.61 0.56 0.66 0.52 OK

Cl 926.2.2.5 of IRC-83(III)191.16 178.24 205.86 163.58

225.00 225.00 225.00 225.00 Cl 926.2.2.5 of IRC-83(III)

0.850 0.792 0.915 0.727 OK OK

Design of Pot Wall cl 926.3.1.1.7 of IRC-83(III)

Max Min max Min

i) 129.18 120.45 139.09 110.54 Cl 926.3.1.1.7.1 (i) of IRC-83(III)

ii) 40.37 37.64 43.46 34.54 Cl 926.3.1.1.7.1 (ii) of IRC-83(III)

iii)-a 145.45 135.61 241.09 124.46

iii)-b45.45 42.38 75.34 38.89

iv) 85.82 80.02 118.80 73.44

v) 204.00 204.00 204.00 204.00 Cl 926.2.2 of IRC-83(III)

vi) 0.42 0.39 0.58 0.36 OK

i) 14.42 13.44 15.52 12.34

ii) 24.35 22.70 40.36 20.84

38.77 36.15 55.88 33.17

153.00 153.00 153.00 153.00 Cl 926.2.2.3 of IRC-83(III)

0.25 0.24 0.37 0.22 OK

i) 21.63 20.16 23.28 18.51

ii) 87.66 81.73 145.30 75.01

109.28 101.90 168.58 93.51

224.40 224.40 224.40 224.40 Cl 926.2.2.2 of IRC-83(III)

0.49 0.45 0.75 0.42 OK

128.26 119.59 194.40 109.76

306 306 306 306 Cl 926.2.2.5 of IRC-83(III)

0.42 0.39 0.64 0.36 OK OK


Max Min max Min

i) 1135.74 1058.97 1222.84 971.87

ii) 384.00 384.00 384.00 384.00

iii)1.16E+05 1.16E+05 1.16E+05 1.16E+05

iv) 9.81 9.15 10.56 8.40

v) 224.00 224.00 224.00 224.00

vi) 80.00 80.00 80.00 80.00

vii) 31397.69 29275.30 33805.65 26867.34viii)

28.97 27.98 30.06 26.80stress = BM*6/(b*d2)=0.66*

ix) 40.00 40.00 40.00 40.00

OK OK OK OK OK


Actual:Permissible

Non-Siesmic Siesmic

iii-6)

Total Stress (Mpa)



Stress (Mpa)

iii-5)




Siesmic







Actual:Permissible


Combined Stress (Mpa)

Permissible Stress (0.9fy) Mpa








concrete (mm2)



Non-Siesmic




iv)




iii)


Bending Moment at Top (N-mm)Thickness of top plate required to cater to

this BM (mm)








Pot

Neoprene pad


25/47


Max Min max Min

i) 1135.74 1058.97 1222.84 971.87

ii) 362.00 362.00 362.00 362.00

iii)1.03E+05 1.03E+05 1.03E+05 1.03E+05

iv) 11.04 10.29 11.89 9.45

v) 224.00 224.00 224.00 224.00

vi) 69.00 69.00 69.00 69.00

vii) 2.63E+04 2.45E+04 2.83E+04 2.25E+04

viii)26.51 25.60 27.51 24.52

ix) 35.00 35.00 35.00 35.00

OK OK OK OK OK



i)

16.00 mm

2.40 mm

ii) Cl 926.2.3.4 of IRC-83(III)


OK


10.00 mm

0.0057 radians

9.14 mm

OK

Diameter & Thickness checks cl 926.2.3.6 of IRC-83(III)ii) 20.00 mm > 16 mm


iii) 224.00 mm > 180 mm


Siesmic


Non-Siesmic


gap after rotation

Thickness of pad

Dia of pad




this BM (mm)


15% of T1


Rotation (Radius)



Rotaion







26/47


i) 5.57 mm

31.80 mm OK

iv) = 63.00 mm > NA mm NA


Max Min max Min

9.32 8.69 15.45 7.98

112.50 112.50 112.50 112.50 cl 926.2.2.3 of IRC-83(III)

0.08 0.08 0.14 0.07 OK

22.50 22.50 22.50 22.50

3272.54 3051.32 5424.51 2800.34

25.17 23.47 41.73 21.54

165.00 165.00 165.00 165.00 cl 926.2.2.2 of IRC-83(III)

0.15 0.14 0.25 0.13 OK

29.91 27.89 49.57 25.59

225.00 225.00 225.00 225.00 cl 926.2.2.5 of IRC-83(III)

0.13 0.12 0.22 0.11 OK


Max Min max Min

i) 145.45 135.61 241.09 124.46

ii) 84.00 84.00 84.00 84.00iii) 20.00 20.00 20.00 20.00

iv) 1680.00 1680.00 1680.00 1680.00

v) 8.00 8.00 8.00 8.00

vi) 18.18 16.95 30.14 15.56

vii) 10.82 10.09 17.94 9.26

viii) 153.00 153.00 153.00 153.00

ix) 0.07 0.07 0.12 0.06 OK


= 90.9 84.7 73.4 77.7

= 110.0 110.0 110.0 110.0 Clause 926.2.6.1 of IRC:83(Part III)-2002

= 0.84 0.78 0.68 0.72

= 36.00 36.00 36.00 36.00

OK OK OK OK OK

R f Cl 926 3 1 5 f IRC 83 (P t III) 2002

No. of bolts used

Bolt Diameter(mm)





Non-Siesmic


Siesmic

i)

Shear Stress (Mpa)


Actual:Permissible

Siesmic



1.5) * 0.75fy)

iii)



Actual:Permissible




ii)



Effective length of lug taking shear (mm)Thickness of lug (mm)








full periphery

Non-Siesmic Siesmic

ii)

Flexural Stress

Eccentricity (mm)

Moment (M) (KN-mm)



Actual:Permissible

Non-Siesmic

i)


Length

Width





27/47

BEARING DESIGN :

40 40

40

40

a. Design Inputs:

= 224 mm


= 40 mm

= 384 mm Cl 926.3.1.1.6.1 of IRC83(III)

= 224 mm

= 40 mm

= 40 mm= 35 mm

=362

mm

= 43 mm

= 28 mm

= 8 mm

= 12 mm

= 2 Nos 10 43

= 4 mm

= 10 mm8 mm

40 20

= 8 mm

= 224 mm

= 4.5 mm Thk>=4.5 mm Ref: Table 4 of IRC:83 (Part-III)-2002= 28 mm

= 50 mm

= 312 mm

= 350 mm NA

= 350 mm OK

= 36 mm

= 35 Mpa Cl 926.2.3.2 of IRC-83(III)

= 40 Mpa Cl 926.2.4.3 of IRC-83(III)


= 250 Mpa


= 0.00 mm

= 5.45 mm

= 0.00566 Radians




= M 40



Bottom:

= 224 mm

= 39408.1382 mm2

= 304 mm Cl 926.2.1.1 of IRC-83(III)= 72583.3567 mm

2

= 13.57 Mpa



Pot Base Thickness



Bolt Dia



No of sealing rings


Neoprene pad stress

Pot Internal Dia


Pot wall thicknessPiston thickness above spigot




PTFE size (thickness)Height of Guide Bar

Width of Guide Bar








PTFE size (dia)





concrete= 0.25* fck

Dia of loaded area

Loaded Area A2

Transverse movement

Rotation (total)



Dia after dispersion(1:2)Dispersion Area A1


0 25f k (A1/A2)




Pot Depth

Pot Wall thck

Pedestal

Bearing

Pot

Neoprene pad

Spigot projection

pad thk


28/47

Max Min max Min

= 28.83 26.89 31.05 24.67

= 35.00 35.00 35.00 35.00


OK OK OK OK OK


= 0.0057 Radians

= 0.63 mm

= 16.00 mm

Check OK

PTFE stress:

28.82 26.87 31.03 24.66

40.00 40.00 40.00 40.00 Ref: Cluse 926.2.4.3 & 926.2.4.4 of IRC-83(III)

0.72 0.67 0.78 0.62 OK



Max Min max Min

= 28.82 26.87 31.03 24.66

= 0.08 0.08 0.06 0.08

Concentrated stresses at pot base:

Max Min max Min

= 9.81 9.14 10.56 8.39

= 13.57 13.57 16.96 16.96 cl 926.2.1.4 of IRC-83(III)

= 0.72 0.67 0.62 0.49 OK


IRC:83(Part -III)


stress (Mpa)

Rotaiton of pad


rotation


Actual Stress (Mpa)


stress (Mpa)

i)




Actual : PermissibleIncrease by 25% when w

earthquake taken into a

Actual (Mpa)

Permissible (Mpa)

Ratio Actual:Permissible

As per Clause 926.1.5: For design of bearings or part thereof and the adjacent structures the resultant of the coexisting moments prodeiced

due to design horizontal force and that induced due to resistance to rotation shall be considered.Non-Seismic Seismic

Maximum Design


5 0.08 0.16

10 0.06 0.12

Non-Siesmic Siesmic



20


PTFE (Mpa)

Maximum


0.04 0.08

more than 30 0.03 0.06

he,effhe

< he,eff * 0.15


29/47

= 64.00 64.00 64.00 64.00

= 1.67 1.56 1.64 1.43

iii)

= 224.00 224.00 224.00 224.00

= 20.00 20.00 20.00 20.00

= 11.20 11.20 11.20 11.20

= 1.64 1.64 1.64 1.64

= 0.0034 0.0034 0.0034 0.0034

= 39.93 39.93 39.93 39.93

= 0.0022 0.0022 0.0022 0.0022

= 1.07 1.07 1.07 1.07


= 112.00 112.00 112.00 112.00

= 145.45 135.61 142.61 124.46

= 3.26 3.04 3.19 2.79

iii-3) = 4.33 4.11 4.26 3.86

iii-4) = 0.78 0.74 0.77 0.69

= 2.45 2.30 2.41 2.13


= 0.19 0.17 0.15 0.13 OK

= 12.26 11.44 12.97 10.52

= 13.57 13.57 16.96 16.96 cl 926.2.1 & cl 926.2.1.4 of IRC-83(III)

= 0.90 0.84 0.76 0.62 OK

= Ref: Cl 926.2.1.3 of IRC-83(III)

= 0.91 0.85 0.77 0.62 OK OK


Max Min max Min

= 110.35 102.89 118.81 94.43

= 187.50 187.50 187.50 187.50 Cl 926.2.2.4 & cl 926.2.2.6 of IRC-83(I II )

= 0.59 0.55 0.63 0.50 OK

= 74.00 74.00 74.00 74.00

= 2.31 2.15 2.27 1.98

iii)


= 224.00 224.00 224.00 224.00

= 20.00 20.00 20.00 20.00

= 11.20 11.20 11.20 11.20

= 1.64 1.64 1.64 1.64

= 0.003 0.003 0.003 0.003

= 39.933 39.933 39.933 39.933

= 0.002 0.002 0.002 0.002

= 1.07 1.07 1.07 1.07


= 112.00 112.00 112.00 112.00

= 145.45 135.61 142.61 124.46

= 3.26 3.04 3.19 2.79

iii-3) = 4.33 4.11 4.26 3.86

ii)



bottom of bearing




iii-1)

Me.d = di3







H (KN)

MR.d (KN-m)

di/he

k1

p (radians)

k2

v (radians)

Me.d (KN-m)



Stress (Mpa)

iii-5)




iii-2)

MR.d = 0.2*C*H





Non-Siesmic Siesmic

i



Vertical Load (Mpa)


Actual:Permissible

iii-6)

Total Stress (Mpa)




Stress Ratio > 1

ii)


eccentricity (mm)

Stress (Mpa)


iii-1)

Me.d = di3

* (k1.p k2.v)




di/he

k1

p (radians)

k2

v (radians)

Me.d (KN-m)

iii-2)

MR.d = 0.2*C*H

C (mm)

H (KN)

MR.d (KN-m)


MR.d (KN-m)


30/47

iii-4) = 0.93 0.88 0.92 0.83

= 3.24 3.04 3.18 2.81

= 165.00 165.00 165.00 165.00 Cl 926.2.2.2 & cl 926.2.2.6 of IRC-83(III)

= 0.02 0.02 0.02 0.02 OK

= 113.59 105.93 121.99 97.23

= 187.50 187.50 187.50 187.50 Cl 926.2.2.4 & cl 926.2.2.6 of IRC-83(III)

= 0.61 0.56 0.65 0.52 OK

Cl 926.2.2.5 of IRC-83(III)

191.16 178.24 205.81 163.58

225.00 225.00 225.00 225.00 Cl 926.2.2.5 of IRC-83(III)

0.850 0.792 0.915 0.727 OK OK

Design of Pot Wall cl 926.3.1.1.7 of IRC-83(III)

Max Min max Min

i) 129.18 120.45 139.09 110.54 Cl 926.3.1.1.7.1 (i) of IRC-83(III)

ii) 40.37 37.64 43.46 34.54 Cl 926.3.1.1.7.1 (ii) of IRC-83(III)

iii)-a 145.45 135.61 142.61 124.46

iii)-b45.45 42.38 44.56 38.89

iv) 85.82 80.02 88.03 73.44

v) 150.00 150.00 150.00 150.00 Cl 926.2.2 of IRC-83(III)

vi) 0.57 0.53 0.59 0.49 OK

i) 14.42 13.44 15.52 12.34

ii) 24.35 22.70 23.87 20.84

38.77 36.15 39.40 33.17

112.50 112.50 112.50 112.50 Cl 926.2.2.3 of IRC-83(III)

0.34 0.32 0.35 0.29 OK

i) 21.63 20.16 23.28 18.51

ii) 87.66 81.73 85.95 75.01

109.28 101.90 109.23 93.51

165.00 165.00 165.00 165.00 Cl 926.2.2.2 of IRC-83(III)

0.66 0.62 0.66 0.57 OK

128.26 119.59 128.79 109.76225 225 225 225 Cl 926.2.2.5 of IRC-83(III)

0.57 0.53 0.57 0.49 OK OK


Max Min max Min

i) 1135.74 1058.97 1222.84 971.87

ii) 384.00 384.00 384.00 384.00

iii)1.16E+05 1.16E+05 1.16E+05 1.16E+05

iv) 9.81 9.15 10.56 8.40

v) 224.00 224.00 224.00 224.00

vi) 80.00 80.00 80.00 80.00

vii) 31397.69 29275.30 33805.65 26867.34

viii)28.97 27.98 30.06 26.80

stress = BM*6/(b*d2)=0.66*

ix) 40.00 40.00 40.00 40.00

OK OK OK OK OK

iii-6)

Total Stress (Mpa)



iv)




Stress (Mpa)

iii-5)









Actual:Permissible


Actual:Permissible

Non-Siesmic Siesmic





















Siesmic




concrete (mm2)



Non-Siesmic

Pot

Neoprene pad


31/47


Max Min max Min

i) 1135.74 1058.97 1222.84 971.87

ii) 362.00 362.00 362.00 362.00

iii)1.03E+05 1.03E+05 1.03E+05 1.03E+05

iv) 11.04 10.29 11.89 9.45

v) 224.00 224.00 224.00 224.00

vi) 69.00 69.00 69.00 69.00

vii) 2.63E+04 2.45E+04 2.83E+04 2.25E+04

viii)26.51 25.60 27.51 24.52

ix) 35.00 35.00 35.00 35.00

OK OK OK OK OK



i)

16.00 mm

2.40 mm

ii) Cl 926.2.3.4 of IRC-83(III)


OK


10.00 mm

0.0057 radians

9.14 mm

OK

Diameter & Thickness checks cl 926.2.3.6 of IRC-83(III)i 20.00 mm > 16 mm


ii 224.00 mm > 180 mm


Non-Siesmic

Dia of loaded area (mm)Projection of piston (mm)

Siesmic

15% of T1


Rotation (Radius)



Rotaion

gap after rotation

Thickness of pad

Dia of pad




this BM (mm)








32/47


i) 5.57 mm

NA mm NA

iv) = 63.00 mm > 15.45 mm OK


Max Min max Min

9.32 8.69 9.14 7.98

112.50 112.50 112.50 112.50 cl 926.2.2.3 of IRC-83(III)

0.08 0.08 0.08 0.07 OK

22.50 22.50 22.50 22.50

3272.54 2525.36 5358.75 2092.96

25.17 19.43 41.22 16.10

165.00 165.00 165.00 165.00 cl 926.2.2.2 of IRC-83(III)

0.15 0.12 0.25 0.10 OK

29.91 24.58 44.16 21.22

225.00 225.00 225.00 225.00 cl 926.2.2.5 of IRC-83(III)

0.13 0.11 0.20 0.09 OK


Max Min max Min

i) 145.45 135.61 142.61 124.46

ii) 84.00 84.00 84.00 84.00iii) 20.00 20.00 20.00 20.00

iv) 1680.00 1680.00 1680.00 1680.00

v) 8.00 8.00 8.00 8.00

vi) 18.18 16.95 17.83 15.56

vii) 10.82 10.09 10.61 9.26

viii) 153.00 153.00 153.00 153.00

ix) 0.07 0.07 0.07 0.06 OK


= 90.9 84.7 73.4 77.7

= 110.0 110.0 110.0 110.0 Clause 926.2.6.1 of IRC:83(Part III) -2002

= 0.84 0.78 0.68 0.72

= 36.00 36.00 36.00 36.00

OK OK OK OK OK

Ref: Clause 926.3.1.5 of IRC:83 (Part -III)-2002

SiesmicNon-Siesmic

ii)



1.5) * 0.75fy)





No. of bolts used

Bolt Diameter(mm)



Siesmic

i)

Shear Stress (Mpa)


Actual:Permissible

iii)



Actual:Permissible










Non-Siesmic Siesmic

ii)

Flexural Stress

Eccentricity (mm)

Moment (M) (KN-mm)



Actual:Permissible

Non-Siesmic


i)


Length

Width




full periphery





33/47

v) 6.00 6.00 6.00 6.00Size of weld to be provided (mm)


34/47

Design of Pin Bearing

Ref: Clause 923.3 of IRC:83 (Part III)-2002

Pin Bearing bear and transmit horizontal forces along any direction in the horizontal plane and accomaodatating rotational movement about any axis.

Pin Bearing can NOT bear or transmit any vertical load.

Design Load for pin bearing:

V Hx Hy

0 1565.51 0.00 KN

max H 1565.51 KN

a. Design Inputs:

= 272 mm

= 294 mm


= 50 mm OK Ref: Cl 926.3.3.8 of IRC 83(III)

= 494 mmCl 926.3.1.1.6.1 of IRC83(III)

= 302 mm

= 80 mm

= 92 mm

= 35 mm

= 440 mm

= 70 mm

= 32 mm 10 70

= 12

= 12 mm 40 80 20

= 0 Nos

= 0 mm

= 10 mm

= 40 mm

= 35 Mpa Cl 926.2.3.2 of IRC-83(III)= 40 Mpa Cl 926.2.4.3 of IRC-83(III)


= 250 Mpa


= 0.0 mm

= 0.0 mm

= 0.00566 Radians




= M 40



Bottom:

= 302 mm

= 71631.4541 mm2

= 402 mm Cl 926.2.1.1 of IRC-83(III)

= 126923.485 mm2

= 13.31 Mpa

Top: = 187.5 Mpa



Transverse movement

Rotation (total)





Neoprene pad stressPTFE stress (working)




Pot Base Thickness




Bolt Dia




Clearance between top edge of cylinder and



No of sealing rings


Pot Internal Dia

Pot wall Depth =61mm

Pot wall thickness


Permissible bearing stress in

bottom flange (= 0.75*fy)

Permissible direct compressive Stress inconcrete= 0.25* fck

Dia of loaded area

Loaded Area A2


Dispersion Area A1


=0.25fck (A1/A2)

Dia of pin

Pedestal

Bearing

Pot

Neoprene pad

Spigot projection

pad thk


35/47

Rotaion check on Neoprene pad ( Ref: clause 926.2.3.4 of IRC:83 (Part III)

= 0.0057 Radians

= 0.83 mm

= 20.00 mm

Check OK

Concentrated stresses at pot base:

= 0.00

= 13.31 cl 926.2.1.4 of IRC-83(III)

= 0.00 OK

= 90.00

= 11.90


= 0.00

= 113.57

= 0.00

iii-3) = 0.00

iii-4) = 0.00

= 11.90

= 13.20 Ref: Cl 926.2.1.2 & Cl 926.2.1.4 of IRC-83(III)

= 0.90 OK

= 11.90

= 13.31 cl 926.2.1 & cl 926.2.1.4 of IRC-83(III)

= 0.89 OK

= Ref: Cl 926.2.1.3 of IRC-83(III)

= 0.90 OK


= 0.00

= 187.50 Cl 926.2.2.4 & cl 926.2.2.6 of IRC-83(III)

= 0.00 OK

= 85.00

= 15.91


= 0.00= 113.57

= 0.00

iii-3) = 0.00

iii-4) = 0.00

= 15.91

= 165.00 Cl 926.2.2.2 & cl 926.2.2.6 of IRC-83(III)

= 0.10 OK

= 15.91

= 187.50 Cl 926.2.2.4 & cl 926.2.2.6 of IRC-83(III)

= 0.08 OK

Cl 926.2.2.5 of IRC-83(III)

15.91

306.00 Cl 926.2.2.5 of IRC-83(III)

0.052 OK

Rotaiton of pad


rotation


As per Clause 926.1.5: For design of bearings or part thereof and the adjacent structures the resultant of the coexisting moments prodeiced

due to design horizontal force and that induced due to resistance to rotation shall be considered.

i)





iii-2)

MR.d = 0.

Documents

Final Pot Ptfe Design Sheet_02.01.13