Download AKTU B-Tech 6th Sem 2014-2015 Design Of Concrete Structures II Question Paper

What is a tank? What are its various structural components? Discuss how various components of a container are designed.

Attempt any two parts of the following:

1. Explain with neat sketches the basic principles of pre-stressed concrete subjected to (i) axial prestressing (ii) eccentric prestressing. Discuss the necessity of using high strength concrete and high tensile steel in prestressed concrete works.

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2. What are the various systems of prestressing? Explain the various mechanical anchoring devices used in post tensioning work with neat sketches.

3. A prestressed concrete beam of rectangular section 120 mm wide and 300 mm deep is prestressed by 6 wires of 6 mm dia provided at an eccentricity of 55 mm. The initial stress in the wires is 1150 N/mm². Find the various losses of stress. Take E_s = 2×10⁵ N/mm²; E_c = 3×10⁴ N/mm² and creep coefficient of concrete = 1.5. M40 concrete has been used in the beam.

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