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Previous Year Exam Questions for Structural Dynamics and Earthquake Engineering - SDEE of 2011 - HITECH by Narayan Sethy

  • Structural Dynamics and Earthquake Engineering - SDEE
  • 2011
  • PYQ
  • Civil Engineering
  • B.Tech
  • Uploaded 2 months ago
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Reg N o . B E D E G R E E E N D S E M E S T E R E X A M I N A T I O N S , J U L Y / D E C E M B E R 2011 CIVIL ENGINEERING BRANCH S E V E N T H S E M E S T E R - R E G U L A T I O N S 2008 C E 9402 - S T R U C T U R A L D Y N A M I C S AND EARTHQUAKE ENGINEERING M a x Marks: MX) ' T i m e : 3 Hrs Answer all Questions [IS 1893:2002 ( p a r t i ) , IS 13920:1993, IS 456:2000-are permitted] Part A 10 x 2 = 20 1. What is effect o f ( i ) gravitational force and ( i i ) base excitation on the equilibrium equation o f motion o f system under vibration? 2. What is meant by amplification factor? Draw the amplification graph w i t h respect to frequency ratio. 3. What is the fundamental natural frequency for a multidegree o f freedom system? 4. List the recent Indian earthquakes with year and magnitude o f occurrence. 5. List the objectives o f Aseismic design. 6. Define Response Reduction Factor. 7. What is meant by liquefaction? What are the effects o f Liquefaction 8. Describe Pinching effect and Bauschinger effect 9. What is meant by confinement? Describe the influence o f stirrups in the confinement o f concrete. 10. Explain the effect o f configuration in the earthquake resistant design o f structures. PartB 5 x 16 = 80 11. Derive the E q u i l i b r i u m equation o f motion f o r the structural Fig.Q.No.l 1. Find out the natural frequency o f the system. -Mass m k a V/V/V//V. b •d Fig. O.No. I I system shown in

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12. a. Plot the mode shapes o f M D O F system as shown in Fig. Q.No.12 (a). IK/2 m K Fig. Q.No. 12(a) K OR b. Find out the response o f the multi-degree o f freedom system as shown in F i g . Q . N o . l 2 ( b ) w i t h the initial condition x , ( 0 ) = x , ( 0 ) a n d x , ( 0 ) = i , ( 0 ) = 0 Fig. Q.No. 12(b) K / 2 '//////, 13. (a) (i) (ii) Explain briefly "Design Spectrum". (4) Write about "Behaviour o f RC structures in the past Earthquakes" and suggest some improvements that may be done to overcome such deficiencies. (12) OR (b) Explain the following : (i) Static versus Dynamic Analysis. (8) (ii) Ductility and Energy Dissipation. <*) 14. a. Discuss about the seismic behaviour o f ( i ) Steel and (ii) Pre-stressed Concrete Structures. Explain w i t h the corresponding Hysteretic curves. OR (b) (i) What are the -different lateral systems for concrete (Give sketches) (ii) For a -column buildings? (12) o f -diameter 300 mm, concrete Fe 415, design the confining reinforcement. grade M 20, 'steel (4) be

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Consider a four-storey reinforced concrete ( O M R F ) o f f i c e building plan is as shown in Fig.Q.No. 15(a). The building floors are at 3m c/c. The building is located at Pune. The s o i l c o n d i t i o n is hard and the entire building is supported on a raft foundation. The R. C. frames are infilled w i t h brick-masonry. The lumped weight due to dead loads is 1 5 k N / m on floors and 10 k N / m on the roof. The floors are -to cater for a live load -of 4.5 k N / m o n floors and 2 k N / m on the roof. Determine design seismic Joad on the structure as per IS 1893 :2002 and distribute the earthquake load along the-height o f the building. 2 2 2 2 y 4.5 m 4.5 m 5.5 m 5.5 m — • x 4 bays @5m c/c Plan o f the building Fig.Q.No. 15(a) OR Write Short notes on i. Transmissibility i i . Plate tectonics i i i . Modes o f vibration iv. Engineering Seismology

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