STUPIDSID
1(a)
What are the different loads to considered in the design of an reinforced concrete element?
6 M
1(b)
Explain the philosophy and principles of limit state method of design.
10 M
1(c)
Explain the necessity of adopting partial safety factors for loads and material strength.
4 M
2(a)
A single reinforced concrete beam 250×450 mm deep upto the centre of reinforcement is reinforced with 3-16 mm dia at an effective cover 50 mm, effective span 6 m, M20 concrete and Fe415 steel. Determine the central point load that can be supported in addition to the self weight.
10 M
2(b)
Determine the moment of resistance of a T-beam for the following data: Breadth of the flange=740 mm; Effective depth= 400mm; Breadth of the web =240 mm; Area of steel = 5 -20; Depth of flange = 110 mm; Adopt M20 grade concrete and Fe415 grade steel.
10 M
3(a)
What are the factors affecting the short term and long term deflections?
6 M
3(b)
A singly reinforced rectangualar beam 360mm×580mm in section is simply supported on a efffective span of 5.25 m. The steel reinforcement consists of 6#20φ. The beam supports a udl of 25 kN/m (Dead load ) and 28 kN/m (live load). Assume M20 concrete and Fe415 steel. Check the design for short and long term deflection. Take ultimate strain in concrete due to shrinkage as 0.0003 and co-efficient of creep as unity. Effective cover may be taken a s 40 mm.
14 M
4
A Tee beam slab floor of an office comprises a slab 150 mm thick sapnning between ribs of 250 mm wide spaced at 3.2 m centre to centre. Clear span of beam = 7.70 m. The beam is 600 mm deep including slab and simply supported over walls of 300 mm wide. Live load on floor = 4 kN/m2, Floor and ceiling finish = 0.75 kN/m2. The beam also support a partition wall which transmits a load of 12 kN/m. Design on of the intermidate beam for flexure and shear. Also check for beam for deflection control. Assume effective cover = 50 mm M20 grade and Fe415 steel.
20 M
5(a)
Distinguish between one way and two way slab.
4 M
5(b)
Design a two way slab for a room of internal dimensions 4m×5m, supported on walls of 300 mm thickness with one corner held down. Two adjacent edges of the slab are discontinuous. Thickness of slab - 150 mm. The slab is to support a live load of 3kN/m2 and floor finish of 1 kN/m2. Sketch the reinforcement detail M20, Fe415 grade.
16 M
6(a)
Design column 4 m long restrained in position and direction at both ends to carry n axial load of 1600 kN. Use M-20 concrete and Fe-415 grade steel . Sketch the inforcement details.
10 M
6(b)
Design a R.C. column, 400mm square, to carry an ultimate load of 1000 kN and ultimate moment of 160kN-m. Use M20 concrete and Fe415 steel. Provide a cover of 40mm.
10 M
7
Design an isolated footing of uniform thickness for an RC square column, of size 500mm×500mm bearing a vertical load 600kN. The safe bearing capacity of the soil may be taken as 120 kN/m2. Use M-20 grade concrete and Fe415 grade steel. Sketch the reinforcement details.
20 M
8
Design a dog legged stair for an office building in a room measuring 2.8m×5.8m. Clear vertical distance between the floor is 3.6m. The width of flight is to be 1.25m. Assume imposed load of 3 kN/m2. Use M20 concrete and Fe415 grade steel. Assume that the stairs are supported of 230 mm at the outer edge of landing slabs. Sketch the reinforcement details.
20 M
More question papers from Design of RCC Structural Elements