Hall Ticket No Question Paper Code: ACE009
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
Four Year B.Tech V Semester End Examinations (Supplementary) January, 2019
Regulation: IARE R16
REINFORCED CONCRETE STRUCTURES DESIGN AND DRAWING
Time: 3 Hours Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
IS 456:2000 is permitted
UNIT I
1. Enumerate the limit states commonly used in limit state design and state briefly how they are
provided in the design
A doubly reinforced R/C beam 300x600mm (effective depth) carry factored moment 450kN-m.
Find the area of steel (compressive and tensile steel). Assume cantilever beam with moderate
exposure condition Use M20 concrete Fe500 HYSD steel
2. Draw the stress block parameters of rectangular R/C beam in limit state method . Also define
the terms Limit state collapse and Limit state serviceability conditions.
A doubly reinforced R/C beam 300x400mm (effective depth) carry factored moment 400kN-m.
Find the area of steel (compressive and tensile steel). Assume simply supported beam at severe
exposure condition Use M20 concrete Fe415 HYSD steel
UNIT II
3. Under what situations do the following modes of cracking occur in reinforced concrete beams:
i.Flexural cracks,
ii. Diagonal tension cracks,
iii. Flexuralshear cracks
iv. Splitting cracks
Determine the ultimate moment of resistance of the following T beam; bf 450 mm, Df 150
mm, bw 300 mm, d 400 mm, Ast 2100 mm2. Assume fy 415 N/mm2 and fck 25
N/mm2.
4. Explain the approaches for control of deflection in bending members as per IS 456. What are
the measures for reducing deflection?
Detail the reinforcement for the following beam, to confirm to the empirical rules in IS 456:2000
for crack control in beams. b 450 mm, Ast 6 Nos. of 25 mm Fe 415 [2950 total depth
of beam 950 mm.
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UNIT III
5. Discuss the Design procedure for two way slab. Explain IS: 456 code method for design of slab.

Design a R/C slab of 3x8 m supported on beams 200x450mm at two sides. Assume imposed
load 3kN/m2 and use M20, Fe415 HYSD steel and corners prevented from uplift. Detail the
reinforcement (Use limit state method)
6. What type of slabs is usually used in practice, underreinforced or over-reinforced? Explain the
need for corner reinforcement in two way rectangular slabs whose corners are prevented from
lifting up.
Design a reinforced concrete slab 6.3 x 4.5 m simply supported on all the four sides. It has to
carry a characteristic live load of 10 kN/m2, in addition to its dead weight. Assume M25 concrete
and Fe 415 steel. (The exposure condition to environment can be classified as mild).
UNIT IV
7. Explain the step by step procedure for design of centrally loaded short column.
Design a circular pin-ended column 400 mm dia and helically reinforced, with an unsupported
length of 4.5 m to carry a factored load of 900 kN. Assume M30 grade concrete and Fe 415 steel.

8. What are the factors that affect the behaviour of slender columns? Write the design procedure
for slender columns for both braced and unbraced column.
A column 300 mm x 400 mm has an unsupported length of 3 m and effective length of 3.6 m. It is
subjected to Pu 1100 kN and Mu 230 kNm about the major axis. Determine the longitudinal
steel using fck 25 N/mm2 and fy 415 N/mm2. Assume 60 mm.
UNIT V
9. Explain with a neat sketch different types of foundations. What are the Indian standard code
recommendations for design of footings as per IS: 456-2000?

Design doglegged stair case of head room 3mx5m for floor height 3.2m. Assume tread 250mm and
riser 150mm and live load 3kN/ m2. Use M20 concrete and Fe415steel. Detail the reinforcement
of stair slab. Use limit state design (steps are RCC).
10. Discuss the step by step design procedure for as sloped footing.
A solid footing has to transfer a dead load of 1000 kN and an imposed load of 400 kN from a
square column 400 mm x 400 mm (with 16 mm bars). Design the footing, assuming fy 415
and fck 20 N/mm2, and safe bearing capacity to be 200 kN/m2.
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