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06000CE301122001 Pages: 2

Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth Semester B.Tech Degree (S,FE) Examination January 2022 (2015 Scheme)

Course Code: CE301
Course Name: DESIGN OF CONCRETE STRUCTURES I

Use of IS 456:2000 is permitted
PARTA
Answer any two full questions, each carries 15 marks.
Distinguish between balanced, under reinforced and over reinforced concrete
sections. Which of these should be recommended in design and why?
Determine the working live load the simply supported rectangular beam of width
250 mm and effective depth 450 mm reinforced with 4 Nos. 16mm diameter steel
bars in the tension side can carry. The clear span of the beam is 5.5 m. The beam
is exposed to moderate exposure conditions. Use M25 concrete and Fe415 steel.
Explain in detail idealized stress-strain curve for steel and concrete.
A reinforced concrete beam of rectangular section 300 mm wide and 500 mm
effective depth is reinforced with 5 bars of 20 mm diameter out of which 2 bars
are bent up at an angle 45° near the support section where a factored shear force
of 250 KN is acting. Using M25 grade concrete and Fe415 grade HYSD bars,
design suitable shear reinforcements for the section.
What are the different forms of shear reinforcement?
Define development length and its significance. Derive an expression for
development length.
Determine the ultimate moment of resistance of a singly reinforced beam of
width 230 mm and effective depth 450 mm reinforced with 3 bars of 20 mm
diameter. Assume M20 grade concrete and Fe500 grade steel.
PART ‏تا‎
‎Answer any two full questions, each carries 15 marks.
Derive expression for moment of resistance of a doubly reinforced rectangular

beam section.

A cantilever beam of span 2.5 m from fixed end is supposed to carry a

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Duration: 3 Hours

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