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M. Tech DEGREE EXAMINATION Branch: Civil Engineering Specialization: Computer Aided Structural Engineering MCESE 205.1 EARTHQUAKE RESISTANT DESIGN OF STRUCTURES (Elective III) Second Semester Model Question Paper - II Time: 3 hours Maximum: 100 marks Answer all questions IS: 1893-2002 and IS: 13920 are permitted 1 (a) Explain elastic rebound theory. (b) Explain the classification of earthquake waves. (c) Explain fault, dip and their role in formation of earthquake. (d) Explain the principle of working of a seismograph with the help of sketches. (e) Explain magnitude of earthquake` (25 marks) OR 2 (a) Explain modified Mercalli’s scale of intensity of earthquake. (b) Explain liquefaction and its effect on structures resting n them (c) Explain tectonic plates and its importance in the study of earthquakes. (d) Discuss secondary hazards of earthquake. (e) Explain the terms hypocentre, epicenter and focus (25 marks) 3 (a) Explain plan irregularities in multistoried buildings and their effect on seismic behaviour, analysis and design of such buildings. (10 marks) (b) What is meant by pseudo velocity and pseudo acceleration. (5 marks) (c) Explain the importance of torsional mode of oscillation in buildings. (5 marks) (d) Explain soft storey in buildings. (5 marks) OR 4 (a) Explain the procedure for design of a shear wall as per IS 13920:1993. (b) Explain the concept of response spectrum. (10 marks) (8 marks) [P.T.O] (c) Plan of a simple single storied building is shown below. All beams and columns have same cross section. Find centre of stiffness. (7 marks) 3m 8m 4m 4m 4m Fig 1 5 (a) Explain ductility demand. How is it ensured in RC framed structures? (10 marks) (b) Figure below shows a plan of 6 storey RC framed structure to be constructed in Delhi. Height of each storey is 3.5 m All columns of 230x450mm and all beams of 230x500mm. Slab thickness is 120mm. Wall around is 230mm thick. Calculate seismic forces at each floor level. Assume relevant data. (15 marks) 4 @ 5m 3 @ 6m Plan [P.T.O] OR 6 (a) Explain retrofitting in structures. (10 marks) (b) Differentiate the behaviour of infilled frame from that of braced frame during earthquake. (8 marks) (c) Explain hysterisis loop of RCC under cyclic loading and discuss pinching effect. (7 marks) 7 (a) Explain prominent past earthquakes in India. Discuss any one in detail and lessons learnt from it. (b) What are the various methods for reduction of earthquake effects on buildings? (c) What are the global deficiencies for a building from point of view of earthquake resistance? (d) Write a note on inherent damping systems in RCC and steel frames. (25 marks OR 8 (a) Explain base isolation in buildings (b) Discuss with sketches the effect of openings on the performance of masonry walls under laterals shaking due to earthquakes. (c) Sketch the details of RCC band to be provided at the plinth level of a two storied base masonry building. (25 marks)