CE325.pdf

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KONERU LAKSHMAIAH COLLEGEOF ENGINEERING

DEPARTMENT OF CIVIL ENGINEERING

III/IV B.TECH, II SEMESTER FOR THE A.Y. 2006-2007

CE325, DESIGN OF STEEL STRUCTURES II

AIMS :

1. To Design the Rectangular Pressed Steel water tanks as per Codes IS 804-1958and IS 800-1984

2. To Calculate the loads and Designing the Gantry Girder3. To Design the shear Connections and Composite beam connections4. To Calculate the Live Loads and Wind Loads on trusses as per IS codes and

Designing the Various elements in Roof Trusses as per IS 800 and IS 875

5. To Design the Plate Girder of Welded type and Riveted type6. To Design the Deck type Railway Plate girder Steel Bridge, Bridge bearings,

Rocker bearings and Roller bearings

OBJECTIVES:

This Subject is an extension of learned chapters in 1st

semester. It

deals with application of various theories explained in previous semester. Analysis

and design of various industrial structures will be covered with illustrative examples.

Additional references will be given at the end of each chapter. Clarifications ill be

given in all tutorial classes and chamber consultancy and colloquia hours for all

doubts etc., Additional advanced topics will be covered in extra classes allotted.

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CODE: CE 325

DESIGN OF STEEL STRUCTURES II

Lectures : 4 Periods/Week Sessional marks : 30Tutorial : 1 period/week University exam. marks: 70

University Exam. : 3 Hours

UNIT 1

1.

STEEL WATER TANKS:Is code specifications; Design of rectangular tank using pressed steel plate;

Design of staging for a rectangular tank.

UNIT 2

2. GANTRY GIRDER:Loads on Gantry girders; Installation; Design of Gantry girder.

3. STEEL CONCRETE COMPOSITE CONSTRUCTION:Design principles; Shear connections; Composite beam design.

UNIT 3

4. ROOF TRUSS:Types of trusses for different spans; Components of a roof truss; Live loads and

wind loads on trusses as per I. S. Codes; Design of purlins; Design of members of

roof truss; Design of end bearings; Design of bracing.

UNIT 45. PLATE GIRDER:

Introduction; Elements of plate girder; Weight and economic depth of plate

girder; Design of web; Design of flanges; Curtailment of flange plates; Intermediate

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vertical stiffeners; Horizontal stiffeners; Bearing stiffeners; Web splice; Flange

splice; Connections; Design of riveted plate girder; Design of welded plate girder.

UNIT 56. STEEL BRIDGES:

Introduction to Steel bridges; Railway broad gauge loading and I. R. C. loadings;

Permissible stresses; Bridge bearings, their types and applications; Design of rocker

bearings and roller bearings; Design of Deck type Railway plate girder bridge.

NOTE:Two questions of 14 marks each will be given from each unit out of which one is to

be answered.

Text Books Prescribed

1) Design of Steel Structures by Anand S. Arya & J.L. AjmaniNemchand & Bros, Roorkee.

References:

1) Design of Steel Structures by S.K. Duggal.

2) Design of Steel Structures by S. Ramachandra Vol. II.3) Design of Steel Structures by Vazirani and Ratwani

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Extent of Home Work Chapter Wise: Exercise problems on the following.

1. Steel Water Tank

a) Design of pressed steel water tank stays, supporting beams.

b) Exercise on design of staging

2. Gantry Girder

a) Design of Girder for Vertical Loads.

b) Design of Girder for Lateral Loads and check for all stresses

3. Steel-Concrete Composite Construction.

a) Design of composite beam and checks.

b) Design of shear connectors

4. Roof Truss

a) Analysis of truss for D.L + L.L and D.L + W.L.

b) Design of truss members

5. Plate Girder

a) Design of main section and check for extreme fibre stresses.

b) Design of Stiffness

6. Steel Bridges

a) Design of Deck type plate Girder check for stresses at centre span.

b) Design of stiffness

c) Design of Bridge Bearings.

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ASSIGNMENT SCHEDULES

1st

Assignment : 20-12-2006

2nd

Assignment : 15-02-2007

SESSIONAL SCHEDULES

1St

Sessional : 11-01-2007

2nd

Sessional : 23-03-2006

Chamber Consultancy Hours: All Mondays & Tuesdays

Time: 1.40 P. M To 5.00 P.M.

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KONERU LAKSHMAIAH COLLEGE OF ENGINEERING

GREEN FIELDS, VADDESWARAM


ASSIGNEMNT 1, ACADEMIC YEAR 2006-07

DESIGN OF STEEL STRUCTURES II (CE325)

Faculty : Sri. A. SREENIVASULU Year/Subject : III/IV B.Tech.Date : Time : 50 Minutes

1. Design an elevated pressed steel tank having capacity of 125000L.The height of staging is 15m. Design of staging is not necessary.

2. Design a rectangular pressed steel tank for a capacity of 150000L. Thetank is to be placed at a height of 12m above the ground. (Design of

staging is not required)

3. A rectangular steel water tank is of dimensions 8 m length X 6 m wideX 4 m height. The tank is situated at a height of 12 m above the

ground. Design a suitable staging for the tank assuming a wind

pressure of 1.5 kN/m2.

4. Design a rectangular pressed steel tank 7.5m x 6.25 m x 2.5 m deepsupported at 9m above ground level. Design tank bearers after

planning the arrangement of the plate.

5. Explain the various components of a pressed steel tank.6. Explain the various precautions you would take while constructing a

pressed steel tank.

7. A steel water tank 7.5m x 5m x 2m (deep) is kept over a staging of 8mhigh. The tank is situated in coastal area top tier beams are ISLB 550.

Assume FOUR columns.

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KONERU LAKSHMAIAH COLLEGE OF ENGINEERING

GREEN FIELDS, VADDESWARAM


ASSIGNEMNT 2, ACADEMIC YEAR 2006-07

DESIGN OF STEEL STRUCTURES II (CE325)

Faculty : Sri. A. SREENIVASULU Year/Subject : III/IV B.Tech.

Date : Time : 50 Minutes

1. Design a simply supported gantry girder of span 15m and carryingmaximum wheel reaction each equal to 80 KN. Assume the wheel

base is 3m. Use the provisions of EOT crane.

2. Design a composite foot bridge having clear span of 2.5m andwidth of 2.5m. The width of support is 0.3m. The bridge is to be

designed as 4000 N/mm2. Use M 20 concrete.

3. A Howe type roof truss is to be designed for a clear span of 24 mwith upper chord divided into six equal panels to serve as a roof

for a laboratory at Delhi. The truss is to be supported on brick

walls. The building height is 10m. The roof covering wall consistsof corrugated fibre sheet. Compute live loads, dead load and wind

load for their combinations. Consider medium permeability.

4. Explain the procedure in the design ofa) Design of composite beam

b) Shear connectorsc) Various checks required

5. Design a roof truss for a factory building for a span of 20m and apitch of 1/5. The height of the truss at every level is 10m. The

spacing of the trusses is 4.5m. the factory building is 36m long is

situated at Guntur. Use fy = 250 N/mm2. Use fink roof truss.

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CE325.pdf