Important questions / expected questions for Nov Dec 2016 CE6701 Structural Dynamics and Earthquake Engineering examinations conducting by Anna University Chennai

B.E./ B.Tech. DEGREE EXAMINATION Nov Dec 2016

07th Semester / VII Semester / IV Year

Civil Engineering

CE6701 Structural Dynamics and Earthquake Engineering

(Regulation 2013)

Nov Dec 2016 Important Questions

Important 16 Marks / Part B Questions (All five units) are listed for CE6701 Structural Dynamics and Earthquake Engineering Subject

1. A mass of 2 kg is suspended by a spring having a stiffness at 700 N/m. The mass is displaced downward from its equilibrium position by a distance of 0.02 m. Estimate equation of motion, normal frequency, the response of the system and total energy

2. i. Briefly explain the types of vibration (10 marks)

ii. A harmonic motion has a maximum velocity of 6 m/s and it has a frequency of 12 cps. Determine its amplitude and maximum acceleration. (6 marks)

3. Derive the equation of motion for viscous damping.

4. A damper offers resistance 0.08 N at a constant velocity 0.06 m/s. the damper is used with a spring of stiffness equal to 12 N/m. Estimate the damping ratio and frequency of the system when the mass of the system is 0.3 kg

5. A vibrating system consists of a mass of 5 kg, spring of stiffness 120 N/m and a damper with a damping co-efficient of 5 N-s/m. Calculate

a. Damping factor

b. Natural frequency of the system

c. Logarithmic decrement

d. The ratio of two successive amplitude

e. The number of cycles after which the initial amplitude reduces to 25%

6. In a two storey building frame, the mass M1 = M2 = 1000 Kg and stiffness are k1 = k2 = 1 MN/m. If a horizontal force of 20 kN is applied at The top of ground storey level, Estimate the displacement of the masses M1, M2.

7. A three spring mass system is shown on figure. All the masses are subjected to dynamic forces. Develop the equation of motion in terms of displacements x1, x2, x3 of the masses along the axis of the springs.

B.E./ B.Tech. DEGREE EXAMINATION Nov Dec 2016

07th Semester / VII Semester / IV Year

Civil Engineering

CE6701 Structural Dynamics and Earthquake Engineering

(Regulation 2013)

Nov Dec 2016 Important Questions

Important 16 Marks / Part B Questions (All five units) are listed for CE6701 Structural Dynamics and Earthquake Engineering Subject

1. A mass of 2 kg is suspended by a spring having a stiffness at 700 N/m. The mass is displaced downward from its equilibrium position by a distance of 0.02 m. Estimate equation of motion, normal frequency, the response of the system and total energy

2. i. Briefly explain the types of vibration (10 marks)

ii. A harmonic motion has a maximum velocity of 6 m/s and it has a frequency of 12 cps. Determine its amplitude and maximum acceleration. (6 marks)

3. Derive the equation of motion for viscous damping.

4. A damper offers resistance 0.08 N at a constant velocity 0.06 m/s. the damper is used with a spring of stiffness equal to 12 N/m. Estimate the damping ratio and frequency of the system when the mass of the system is 0.3 kg

5. A vibrating system consists of a mass of 5 kg, spring of stiffness 120 N/m and a damper with a damping co-efficient of 5 N-s/m. Calculate

a. Damping factor

b. Natural frequency of the system

c. Logarithmic decrement

d. The ratio of two successive amplitude

e. The number of cycles after which the initial amplitude reduces to 25%

6. In a two storey building frame, the mass M1 = M2 = 1000 Kg and stiffness are k1 = k2 = 1 MN/m. If a horizontal force of 20 kN is applied at The top of ground storey level, Estimate the displacement of the masses M1, M2.

7. A three spring mass system is shown on figure. All the masses are subjected to dynamic forces. Develop the equation of motion in terms of displacements x1, x2, x3 of the masses along the axis of the springs.

8. Solve the natural frequency and mode of vibration of the system

9. Elaborate undamped system with an example

10. Define steady state response and determine the steady state response of the system.

11. i. Explain the seismic waves with neat sketch.

ii. Discuss about the elastic rebound theory

12. i. Explain the types of geological faults.

ii. Discuss about the classification of earthquake.

13. Describe about the characteristics of strong ground motion with neat graph

14. i. List out the two approaches followed for the prediction of earthquakes and explain it.

ii. Name the major plates of the earth

15. Write short notes on

i.Tsunami

ii. Spectral acceleration.

16. Discuss about the vertical irregularities that affect the performance of RC buildings during earthquake

17. Examine the plan configuration problems that affect the performance of RC buildings during earthquake.

18. Define Response spectra. Explain the concept and types of response spectra with neat sketch

19. Define the following terms and explain it:

i. Smooth spectrum

ii. Seismic demand diagrams.

20. Explain briefly the effect of earthquake on different types of structures

21. Write down the design principles involved in design of masonry structure.

22. Explain the principles and practice of earthquake resistant design of R.C.C buildings

23. Explain about the Earthquake design philosophy

24. Why ductility consideration is very important in earthquake resistant design of RC building Explain the ductile detailing considerations in flexural members as per IS 13920-1993.

25. i. List out the design principles of earthquake resistant structure as per IS 1893-2002.

ii. Write in detail about the special confining reinforcement detailing as per IS 13920-1993.

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