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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII EXAMINATION — WINTER-2017
Subject Code:170603 Date: 10-11-2017
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Subject Name: Structural Design -1
Time: 10:30 am to 01:30 pm Total Marks: 70
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Instructions:
- Use of SP-16(Design Aids) is NOT permitted.
- Use of IS-456-2000, IS: 800-2007 and Steel Table is permitted.
- Attempt all questions.
- Make suitable assumptions wherever necessary.
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Figures to the right indicate full marks.
Q.1 (a) State advantages and disadvantages of Welded and bolted connections. 07
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(b) Explain in brief: Lug Angle. 04(c) Describe what you understand by class 4.6 and class 8.8 bolts. 03
Q.2 (a) A column of height 5 m is hinged at the ends. It is square in cross- section of 07
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side 360 mm and consists of 4 angles of ISA 80 X 80 X10 mm at each corner,suitably laced. Find load carrying capacity of column.
(b) Derive the expression for depth of neutral axial and moment of resistance for a 07
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balanced RCC beam section.
OR
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(b) Draw neat and clean figures for beam to beam connection and beam to column 07
connection in steel design.
Q.3 (a) A simply supported R.C.C. beam of size 230 mm wide and 450mm depth with 07
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clear span of 5 m is reinforced with 4 nos. of 16 mm diameter bar and clearcover of 25 mm. Width of support-is 230 mm. It is loaded by uniformly
distributed load of 50 kN/m. Design the Shear Reinforcement using 2 legged 6
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mm mild steel stirrups. Use M20 grade concrete and Fe-415 grade steel.
(b) Design a slab of size 3.5 m X 7.5 m resting on wall of 230 mm thick. Assume 07
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Live load = 3 kN/m². Check for cracking and deflection only. Use M20 gradeconcrete and Fe-415 grade steel.
OR
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Q.3 An RCC column of size 350 mm x 350 mm reinforced with 8 nos of 16 mm 14
diameter bars; carries characteristic load of 900 kN. The allowable bearing
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pressure on soil is 210 kN/m². Design isolated footing. Use M20 and Fe 415 forboth column and footing. Carry out all checks. Draw detailed reinforcement
layout also. Assume 10% dead load of footing.
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Q.4 (a) A 150 mm thick R. C. C. flat slab is loaded by live load of 5 kN/m² and floor 07
finish load of 1.5 kN/m². It is supported by 4 columns of size 450 x 450 mm.
The column head is changing the size of 600 x 600 mm bottom to 1500 x 1500
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mm at top over the depth 500 mm. The columns are placed at 4.5m x 6m centre
to centre. Check the slab for shear only.
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(b) An angle section 90 x 90 x 8 mm is to be connected to gusset plate by 6 mm 07fillet weld on sides and at the end of the member. The member is carrying
tensile load of 120 kN. Design the welded connection. Assume steel grade Fe
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410 and field welding.
Q.4 (a) Design a short column square in section to resist the factored axial load of 07
2400 kN. Provide all necessary checks and detailed sketch. Use M25 grade of
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concrete and Fe 415 grade of steel.
(b) An unequal angle 1.5 m long, of a truss is connected to the gusset plate. It 07
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carries ultimate tension of 230 kN. Design the section using 4 mm weld.Q.5 Design a simply supported steel beam of 7 m span carrying a RC floor capable 14
of providing lateral restraint to the top compression flange. The total factored
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U.D.L subjected on beam is 50 kN/m throughout and factored point load actingat center is 200 kN. Use ISMB section. Check for web buckling only.
OR
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Q.5 (a) A steel column ISMB600 is loaded by the factored axial compressive load of 07
600 kN. Design the suitable slab base for the column. Assume Fe 410 grade steel
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and M25 grade concrete. Take safe bearing capacity of soil as 200 kN/m².(b) Design a laterally unrestrained beam simply supported over a span of 2 m. It 07
carries a uniformly distributed load of 56 kN/m including self weight. Use
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ISMB section.
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