Subject Code: 170603
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-VII (OLD) EXAMINATION — WINTER 2018
Subject Name: Structural Design-I
Time: 10:30 AM TO 01:30 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
- Use of IS- 456-2000, IS: 800-2007 and Steel Table is permitted.
- Use of SP-16(Design Aids) is NOT permitted.
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Q.1 (a) Explain in brief design philosophy of various methods of design. 07
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(b) Draw neat and clean figures for beam to beam connection and beam to column connection in steel design. 07
Q.2 (a) Write the design steps for the RC combined footing. 07
(b) Sketch neatly the Design Stress and Strain Block Parameters and derive equation for Depth of Neutral Axis and Moment of Resistance for a balanced beam section. 07
OR
(b) Explain Strength, Serviceability, stiffness, stability and ductility in brief. 07
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Q.3 (a) Explain one way shear check and two way shear check for footing design. 07
(b) Draw the neat sketches of Lacing system, Battening system for steel columns. 07
OR
Q.3 (a) A reinforced concrete beam of rectangular section 230 mm x 500 mm deep is reinforced with tensile and compressive reinforcement 4 nos. 20 mm dia. and 2 nos. 16 mm dia. at effective cover of 50 mm on both side respectively. Using concrete M20 and Fe250. Find moment of resistance of the beam. 07
(b) A circular column 300 mm dia. and 5.5 m height is effectively held in position and direction at one end only held in position at other end. Use minimum % of steel. Use M20 and Fe415. Find safe load of column. 14
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Q.4 (a) Design a simply supported two way slab of a clear size 3 m x 4 m for a live load of 3 kN/m². The slab is supported on 250 mm wall. Assume corners are held down. Use M20 and Fe415. Perform all necessary checks and Sketch the reinforcement detailing. 04
OR
Q.4 (a) 1) A R.C.C beam has C/S 300 mm x 600 mm and is subjected to BM=110 kN.m, SF=90 kN, TM=40 kN.m. Determine the equivalent bending moment and shear force for which the section is to be designed. 03
i1) Determine development length of 16 mm dia. bar in compression. Use M25 and Fe415. 07
(b) A two span continuous beam of each span length 8 m is loaded with DL = 10 kN/m and LL = 20 kN/m. Design the beam using plastic method. Take fy =250 N/mm². 07
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Q.5 (a) Design suitable fillet weld to connect a tie plate 60 x 8 mm to a 12 mm thick gusset plate. The plate is subjected to load equal to full strength of member. Assume shop welding and Fe410. 07
(b) A Tension member in a roof truss is subjected to factored tensile load of 300 kN. Design the member using two angles on both side of gusset plate. Assume fy = 250 MPa and 20 mm dia. bolt. 07
Date: 26/11/2018
Total Marks: 70
Q.5 (a) Calculate the compressive strength of a single angle strut ISA 100 x 75x 10 mm with c/c length of 1.5 m. Angle is loaded through one leg and ends are fixed. Consider 1 bolt at each end. Take fy =250 MPa. 07
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(b) Calculate the moment carrying capacity of laterally unrestrained beam ISMB 350 of 3 m long. It has full torsional restraint and no warping restraint. 07
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