Jaypee Institute of Information Technology (JIIT) 2008 B.E Civil Engineering Test 3 : Design of Concrete Structures - Question Paper
JAYPEE IMVERSITY OF INFORMATION TECHNOLOGY waknagiiat Teal-3
5* semester. B.Tech. Ci\il Engineering
COURSE CODE: 07B51CEIU2 MAX TIME: 1 hr 30 mins
COURSE NAME: Design of Conercte Structures
COURSE CREDITS: 04 MAX MARKS. 30
(a) Write down the conditions in which doubly reinforced sections arc preferred Also discuss the advantages of these sections. (2J
Q.l
(b) Determine the reinforcement required for a beam of width 300 mm and overall dcpih of600 mm for a factored moment of 320 kNm. Use M20 and Fe415 materials and a nominal cover of 30 mm to the reinforcement. Table for fH w.r.t. d'/d is given
below; j4(
Q.2.
Q.3.
|
/*(Nrnim) |
d'/d | |||
|
0 05 |
0.10 |
0.15 |
0.20 | |
|
Fe4I5 |
355 |
353 |
342 |
329 |
(a) Design a short square column to carry an axial load of 1200 kN. Use M25 concrete and Fe 415 Steel. Design the ties also (4[
(b) Design the reinforcement for a 2-way restrained slab with effective spans 4 m* 3 m subjected to a super-imposed load of 4 kN-'m2 including self-weight and live load of 6 kNW. The slab has two short edges discontinuous. Use M20 concrete and Fe4l5 steel. /<//
Design the depth and reinforcement of an isolated footing of uniform thickness of an RCC column with a vertical load of 600 kN and having base of size 500mm* 500mm. The safe bearing capacity of the soil is 120 kNVm2. Use M15 concrete and Fe 415 steel
m
OR
A longitudinal type staircase spans a distance of 3.75 m c/c of beams The rise is 175 mm and tread is 250 ram. The treads are subjected to a live load of 5 kN/m2 and super-imposed load of 4 kPiW. The number of steps is 15 and width of stair case is 1.5 m. Design tlte staircase using M20 concrete and Fc 250 steel. 11 Of
Write short notes on any two of the following:
Q.4.
/J *2 - 6]
(i) Development length and its determination as per 1S-456:2000
(ii) Various limit-siates in the Limit State Method.
(iii) Requirements of good reinforcement-detailing
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| Earning: Approval pending. |
