PTU B.Tech CIVIL 6th Semester May 2019 71082 DESIGN OF CONCRETE STRUCTURES II Question Papers

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Total No. of Pages : 02

Total No. of Questions : 09

B.Tech.(CE) (2011 Onwards) (Sem.-6)

DESIGN OF CONCRETE STRUCTURES-II

Subject Code : BTCE-601

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M.Code: 71082

Time: 3 Hrs.

Max. Marks : 60

INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.

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2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt ANY FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt ANY TWO questions.
4. IS 456-2000, IS3370 and design aid SP 16 are permitted in examination.

SECTION-A

Q1. Answer briefly :

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1. List the different types of stairs.
2. Describe the assumptions for the design of strap footing.
3. Write the functions of lateral ties in a column.
4. Define the effective length.
5. Explain about intermediate and end moments in continuous beam.

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6. In case of curved beams, the support sections are designed for maximum negative bending moment and shear. Give your comments.
7. Show plan and elevation of cantilever retaining wall.
8. When a shear key is provided in a reinforced concrete retaining wall?
9. In what ways, circular water tank is preferred over rectangular water tank?
10. What are various forces which are considered for the design of dome?

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SECTION B

Q2. Design a footing for a rectangular column 230 × 450 mm, carries an axial load of 1500 kN. The SBC of the soil is 150 kN/m². Use M 20 concrete and Fe 415 steel.

Q3. A reinforced concrete column 500 × 500 mm is subjected to a factored axial load 1500 kN and factored moment of 150 kN-m. Determine the reinforcement for the column. Use M20 concrete and Fe 415 steel.

Q4. Write the basic assumptions made in design of continuous beam.

Q5. Design a conical dome for hall 12 m in diameter. Rise of dome is 4 m. Live load on the dome may be taken as 2.5 kN/m². Use M25 concrete and Fe 415 steel.

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Q6. Why counterforts are provided in a retaining wall? Draw a counterfort retaining wall and mark its components.

SECTION-C

Q7. A staircase of 1.2 m width for an office building consists of each step built into wall with a bearing of 110 mm along the flight with tread = 250 mm and rise = 200 mm. Design the staircase and sketch layout of reinforcement. Use M20 concrete and Fe 415 steel.

Q8. Design a rectangular water tank resting on ground having base area of 4m × 6m. The height of water tank is 3.75 m and keep a free board of 0.15m. Use M25 concrete and Fe 415 steel. Assume appropriate data and clearly state the assumptions.

Q9. Write short note on

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1. Differentiate between isolated footing and combined footing.
2. Explain the basic assumptions made for design of short axially loaded compression members.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.