Name of the College : Valliammai Engineering College
Subject : Design of RC Elements
Website : valliammai.co.in
Document Type : Question Bank
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Valliammai Design Of RC Elements Question Paper
Unit – I
PART-A
1. Calculate the design strength for M 30 grade concrete and Fe 415 grade steel?
2. What is the important principle of ultimate load method?
3. Write the classification of structures according to crack width?
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4. How is limit state method differ from working stress method?
5. Distinguish between characteristic load and factored load?
6. What is the importance of flanged beams?
7. What is the main advantage of limit state of collapse?
8. How is the safety margins assigned in Elastic method and ultimate load method?
9. Calculate the limiting value of tensile stress in a cracked section of a flexural member made with M25 grade of concrete.
10. What are the advantages of liimiitt state method overworking stress and ultimate load methods?
11. How do you find the moment of resistance of a beam section??
12. What is modular ratio? Determine the modular ratio at M20 & M25grade concrete?
13. What do you understand by limit state of collapse?
14. Draw stress–strain curve for various grades of ssteel.
15. State the assumtions made in working stress method.?
PART B :
1.a) Explain clearly under-reinforced, balanced and over-reinforced sections?
b) What do you mean by uncracked and cracked sections and how will you determine the moment of resistance of these section?
2. A R.C. beam of rectangular cross section is required to resist a bending moment of 120 kN-m at Service State. Design the suitable dimensions of the cross section and reinforcement for the balanced sections. Take the effective depth as twice the width. Assume M 20 grade concrete and Fe 415 grade steel. Adopt working stress method?
3.a) Explain the concept of elastic method?
b) What do you mean by uncracked and cracked sections and how will you determine the moment of resistance of these section?
4. A R.C. beam of rectangular cross section is required to resist a bending moment of 120 kN-m at Service State. Design the suitable dimensions of the cross section and reinforcement for the balanced sections. Take the effective depth as twice the width. Assume M 20 grade concrete and Fe 415 grade steel. Adopt working stress method?
5. A reinforcement concrete beam section of size 300×700 mm effective depth is reinforced with 3 bars of 20 mm diameter in tension. Determine the moment of resistance and the maximum stresses induced in the materials using working stress method?
6. Design a circular water tank of capacity 200 kilolitres resting on ground and flexible base at the bottom.Assume allowable stess as =1.2MPa.=115 MPa and modular ratio m=13.
7. Design a rectangular RC beam in flexure and shear when it is simply supported on masonry walls 300mm thick and 5m apart (centre to centre) to support a distributed live load of 8 KN/m and a dead load of 6KN/m in addition to its own weight. Materials used are M20 grade of concrete and Fe415 steel bars. Adopt working stress method of design.
8. Design the roof slab for a Hall of size 4m x 10m by working stress method using M20 concrete and Fe415 steel. The slab is simply resting on 230mm thick brick walls all around. Take the live load on the slab as 1.5KN/m2 and finish load as 2.25KN/m2.
9. Design a doubly reinforced beam to carry a super imposed load of 60KN/m. The overall depth and width of the beam are restricted to 840mm and 300mm respectively. The beam has a clear span of 5m and bearing of 50cm on each end. Use M15 grade concrete and M.S. grade-I bars.
10. The floor of hall measure 16m x 16m to the faces of the supporting walls. The floor consists of three beams spaced at 4m centre to centre, and the slab thickness is 120mm. The floor carries an udl of 5KN/m2, inclusive of the floor finishes. Design the intermediate beam. Use M15 and M.S. grades. Design the section. Take width support=500mm.
Unit – II
PART-A :
1. Mention the codal provisions for minimum reinforcement to be provided as primary and secondary reinforcement to be provided as primary and secondary reinforcement in R.C. slab?
2. Compute the area of reinforcement required for a balanced section of width 200 mm and effective design 425 mm as per limit state design. Use M 25 grade concrete and Fe 415 grade steel. Use design aids.
3. Enumerate the codal provisions for minimum reinforcement to be provided as primary and secondary reinforcement in R.C. slab.
4. What is the importance of flanged beams?
5. State the basic assumptions used in theory of simple bending as applied to LSD of RC structures
6. Distinguish between balanced section and under reinforced sections?
7. Distinguish between one –way and two way slabs.
8. Discuss the different limit state to be considered in reinforced concrete design?
9. Why is it necessary to provide transverse reinforcement in a one way slab?
10. What are the three basic methods using factor of safety to achieve safe workable structures?
11. Explain maximum depth of neutral axis?
12. Find the depth of neutral axis in terms of ‘d’ for a balanced section using Fe 415 steel, in limits method?
13. What is the difference in the design of one way slab and two way slabs?
14. Distinguish between under reinforcement and over reinforcement section?
15. Sketch edge and middle strips of a two way slab?
16. How Limit State Method aims for a comprehensive and rational solution to the design problem?
17. Differentiate between WSD and LSD.