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Reg No.:_ Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIFTH SEMESTER B.TECH DEGREE EXAMINATION(S), MAY 2019

Course Code: CE301

Course Name: DESIGN OF CONCRETE STRUCTURES I

Max. Marks: 100 Duration: 3 Hours
INSTRUCTIONS: 1. Use of IS 456:2000 is permitted
2. Furnish reinforcement detailing of sections designed
PARTA

Answer any two full questions, each carries 15 marks. Marks
1 a) A rectangular beam 250mm wide and effective depth 450 mm has 4 bars of (10)

20mm diameter. Find the moment of resistance of the section if M20 concrete
and Fe 415 grade steel are used. As per IS 456:2000 find the limiting moment of
resistance also.

b) Explain how the longitudinal reinforcement bent up nearer to the supports (5)
contribute to the shear resistance of RC beams?

2 a) Explain the terms Characteristic strength and Characteristic load. (5)

b) A 250 mm wide RC beam with 450mm depth is reinforced with 4 numbers 16 (10)
mm diameter bars of Fe 415 grade steel. Effective cover to reinforcement is
50mm. The beam is provided with 8 mm diameter 2 legged vertical stirrups at
160 mmc/c as shear reinforcement. M20 concrete is used. Determine the design
strength in shear and also its limiting value.

3 ஐ Design the shear reinforcement for a simply supported RC beam of effective (10)
span 5m with width 300mm and effective depth 400mm and carrying a
superimposed load of 10 kN/m. The beam is reinforced with 3 bars of 20 mm
diameter. Use M20 concrete and Fe 415 grade steel.

b) Why does the code impose minimum and maximum limits with regard to (5)
(i) spacing and (ii) percentage area of flexural reinforcement?

PART B
Answer any two full questions, each carries 15 marks.
4 Design a simply supported beam of span 6m subjected to a live load of 4 KN/m. (15)

Use M20 concrete and Fe415 steel.
5 9७) Design a cantilever slab of span 2m to carry imposed load of 2 kN/m? over its (12)
entire span. Finish load=0.5 kN/m*. Use M20 concrete and Fe415 steel. The slab

is supported by a beam of size 300mmx500mm.

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