JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV Year ADVANCED STRUCTURAL DESIGN Previous Question Paper (January/February - 2023 - R18)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks.
Use of IS456, IS800, IRC6 and IRC112 is allowed.
PART - A
What is the basis of classification of retaining walls?
Answer
Retaining walls are primarily classified based on their structural action and the method of resisting lateral earth pressure, including gravity walls, cantilever walls, counterfort walls, and buttress walls.
What are the modes of failure of retaining walls?
Answer
The common modes of failure for retaining walls are: 1) Sliding along the base, 2) Overturning about the toe, and 3) Bearing capacity failure of the soil beneath the base.
What is the necessity of the column capital in a flat slab?
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What are the advantages of ribbed slab construction?
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What is an essential parameter in the construction of RCC water tanks?
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What is the structural behaviour of a circular water tank with rigid joint between base and wall?
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What is the main limitation of a deck slab bridge?
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What are the factors influencing the selection type of a bridge?
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What are the factors influencing the magnitude of impact loads in the design of gantry girders?
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What are the assumptions made in the design of a gantry girders?
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PART - B
Design a cantilever retaining wall to retain soil 4 m high above ground level. Use the following data: The density of soil is 18.5 kN/m2, Angle of internal friction is 300. The safe bearing capacity of soil is 160 kN/m2, The coefficient of friction between soil and concrete is 0.45. Use M30 grade of concrete and Fe500 steel. Sketch the reinforcement details.
Answer
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Deign a counterfort retaining wall to retain soil 4 m above ground level using the following data: Spacing of counter forts: 3 m c/c, The density of soil: 18 kN/m2, Angle of internal friction: 250. The safe bearing capacity of soil: 175 kN/m2, The coefficient of friction between soil and concrete: 0.45. Use M25 grade of concrete and Fe 500 steel. Sketch the reinforcement details.
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Design an interior panel of a flat slab 5.4 m × 5.4 m in size subjected to an imposed load of 5 kN/m2. Use M25 grade of concrete and Fe 500 steel. Sketch the reinforcement details.
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Design a simply supported ribbed slab of size 4.8 m × 4.8 m subjected to factored load of 8 kN/m2. Use M25 grade of concrete and Fe 500 steel. Sketch the reinforcement details.
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Design an RCC water tank resting on the ground to store 75,000 liters of water. Use M25 grade of concrete and Fe 500 steel. Assume the joints are rigid. Sketch the reinforcement details.
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Design the base slab of a circular water tank with flat base for a capacity of 1,50,000 liters. Assume the bottom slab is supported on a ring beam. The height of staging is 9 m. Use M25 grade of concrete and Fe 500 steel. Sketch the reinforcement details.
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Design a reinforced concrete slab bridge for class A loading using the following data: Clear width of road way = 7 m, Clear span = 12 m. Use M 30 grade of concrete and Fe 500 steel. Sketch the reinforcement details.
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Explain the various components of concrete bridges and loads used in the design.
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Design a gantry girder to carry over head traveling crane for a workshop building using the following data: Capacity of crane: 200 kN, Weight of crane excluding trolley: 150 kN, Weight of trolley: 50 kN, Distance between centers of gantry girder: 12 m, Distance between centers of crane wheels: 2 m, Span of gantry girder: 6 m, Weight of rail section: 0.3 kN/m, Height of rail section: 75 mm.
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Explain the various components of a gantry girder and the types of loads used in design of a gantry girder.
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