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SEISMIC DESIGN SEISMIC DESIGN
OFOF
RADISSON HOTELRADISSON HOTEL
NEW DELHINEW DELHI
BYBY VINAY GUPTA
CEOTCPL DELHITCPL, DELHI
GENERAL VIEW
AREA USAGEAREA USAGE
• LOWER BASEMENT: PARKING, DG, CHILLER PUMPS & OTHER SERVICES
• UPPER BASEMENT: PARKING, LAUNDARY, KITCHEN, BOWLING ALLEY, SPA, SQUASH, ETC
• GROUND FLOOR: LOBBY, BANQUET, RESTAURANTS, ETC
• MEZZANINE: SERVICES TRANSFER, TRANSFER GIRDERS, ETC
• UPPER FOUR FLOORS: GUEST ROOMS
CONSTRAINTS
HEIGHT DUE TO AVIATION RESTRICTIONS• HEIGHT DUE TO AVIATION RESTRICTIONS
COST & TIME• COST & TIME
• BASEMENT LARGER THAN UPPER FLOORS• BASEMENT LARGER THAN UPPER FLOORS
BLOCK‐IBLOCK‐IIBLOCK‐IIICOMMERCIAL BLOCK
MOVEMENT GAP
50m 50m
GAP
‐ Temp: 12x10‐6 x (±) 25°cx50m = ± 15mm 20m
Buildingblock
Buildingblock
Sh i k 2 5 10 4 50 12 5‐ Shrinkage: 2.5x10‐4 x 50m = ‐12.5mm(14 days decentering)
‐ Seismic: ± 15mm (out of phase)
‐ Total: ± 15 – 12.5 ± 15 = ‐42.5mm;+17.5mm
EXPANSION JOINTS
EXPANSION JOINTS
STRUCTURAL SIMPLICITY EN 1998‐1:2004
STRUCTURAL SIMPLICITY INCORPORATING CLEAR AND
EN 1998‐1:2004
STRUCTURAL SIMPLICITY INCORPORATING CLEAR AND DIRECT PATHS FOR TRANSIMISSION OF SEISMIC FORCES IS ANIMPORTANT ASPECT AS SIMPLE STRUCTURES ARE SUBJECT TOIMPORTANT ASPECT AS SIMPLE STRUCTURES ARE SUBJECT TO
MUCH LESS UNCERTAINTY OF SEISMIC BEHAVIOUR
Ha! Ha!!
HABITAT 67HABITAT 67
DUCTILITY : IS : 13920 (ZONES III, IV & V)DUCTILITY : IS : 13920 (ZONES III, IV & V)FLEXURAL MEMBERS: Pfactored ≤ 0.1 fck)
• +ve BM Steel ≥ 0.5 of –ve BM Steel
• Development length + 10xd
• Hoops over spliced bar length
N li i 2d & ¼ b l h• No splicing upto 2d & ¼ member length
M i f i l fi t i f d• Max spacing of special confinement reinforced
: 8 x dia of smallest longitudinal bar: 8 x dia of smallest longitudinal bar: d/4 : 100mm: 100mm• provided over 2 x depth
COMPRESSION MEMBERS (Pfactored > 0.1 fck)
• Stirrup spacing of parallel legs ≤ 300mm or cross tie
• Extent = larger of:i. Least Lateral Dimensioni. Least Lateral Dimensionii. Column clear height/6iii. 450mm
• Hoop spacing = ¼ smaller dimensionp p gbut ≤ 100mm and ≥ 75mm
DESIGN FOR IRREGULARITIESDESIGN FOR IRREGULARITIES
V ti l/H i t l i l it S ti J i t• Vertical/Horizontal irregularity = Separation Joint
• Soft storey (Stiffness ≤ 80% of avg of 3 floors above)• Soft storey (Stiffness ≤ 80% of avg of 3 floors above)i. Increase ‘I’ value of soft storey orii Design Columns & Beams for 2 5 times EQ forceii. Design Columns & Beams for 2.5 times EQ force
oriii Shear walls at farthest symmetrical location;iii. Shear walls at farthest symmetrical location;
1.5 times the EQ force
•
Connection of Brick Wall with RCC Members
CONSTRUCTIONCONSTRUCTION
PHOTOGRAPHSPHOTOGRAPHS
CONSTRUCTIONCONSTRUCTION
PHOTOGRAPHSPHOTOGRAPHS
VINAY GUPTACHIEF EXECUTIVE OFFICERCHIEF EXECUTIVE OFFICER
TANDON CONSULTANTS PVT LTDNEW DELHI