Download GTU BE/B.Tech 2019 Winter 6th Sem Old 160605 Earthquake Engineering Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 6th Sem Old 160605 Earthquake Engineering Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? VI (Old) EXAMINATION ? WINTER 2019
Subject Code: 160605 Date: 06/12/2019

Subject Name: Earthquake Engineering

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. IS 13920, IS 1893 and IS 4326 are permitted.

Q.1 (a) Define following terms:
(1) Natural Frequency (2) Vibration (3) Resonance (4) Oscillation (5)
Damping (6) Static Load (7) Dynamic Magnification Factor

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(b) Write short note on Logarithmic Decrement.

07

Q.2 (a) Derive the equation of undamped free vibration of single degree of freedom
system.

07
(b) A spring mass model consists of 5 kg mass and spring of stiffness 5 N/mm
was tested for viscous damped vibration. The test recorded two consecutive
amplitude is 1.0 cm and 0.85 cm respectively. Determine (i) Natural frequency
of un-damped system (ii) Logarithmic decrement (iii) Damping ratio (iv)
Damping coefficient (v) Damped natural frequency of system.

07
OR
(b) A vertical cantilever of mild steel tube section is 2.5 m long and supports 5.0 kN
weight at top. The tube has 250 mm external diameter and 5 mm wall thickness.
The system is subjected to a horizontal harmonic force of 1.0 kN amplitude and
4 Hz frequency at top. Find the maximum steady state displacement and bending
stress in the tube. Take damping 5% of the critical.
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Q.3 (a) Define degree of freedom. Explain in detail the types of degree of freedom with
example and sketch.
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(b) Write short note on liquefaction. Explain factors affecting liquefaction. 07
OR
Q.3 (a) Enlist the different methods of structural control and explain any one in detail. 07
(b) Define ductility. Explain the importance of ductility and types of ductility. 07

Q.4 (a) Explain various bands and vertical reinforcements for earthquake resistant
masonry structures.
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(b) Define following terms:
(1) Focus (2) Epicenter (3) Aftershock (4) Accelerometer (5) Focal Depth
(6) Seismic Zone (7) Seismograph
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OR
Q.4 (a) Write a short note on seismic waves. 07
(b) Explain elastic rebound theory in detail. 07

Q.5 (a) Explain the Rigid Diaphragm Effect with sketch. 07
(b) Explain four virtues of earthquake resistant design. 07
OR
Q.5 (a) Explain the effect of irregularities on performance of RC Buildings with sketch. 07
(b) Explain the step wise procedure to find the base shear of multi-storey building
with seismic coefficient method with codal provisions.
07

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