Name of the College : SREE CHAITANYA COLLEGE OF ENGINEERING
University : JNTUH
Department : Civil Engineering
Subject Code/Name : 07A70104/EARTHQUAKE RESISTANT DESIGN
Year/Sem : IV/I
Website : scce.ac.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/scce.ac.in/4902-07A70104%20%20EARTHQUAKE%20RESISTANT%20DESIGN.pdf
Earthquake Resistant Design Question Paper :
B.Tech IV Year I Semester Examinations, December-2011
(CIVIL ENGINEERING)
Time: 3 hours
Related / Similar Question Paper : SCCE JNTUH B.Tech Industrial Waste & Water Management Question Paper
Max. Marks: 80
Answer any five questions :
All questions carry equal marks :
1. Derive the equation of motion for an damped free vibration of motion for Single degree of Freedom (SDOF) from first principles. Write the equations for maximum displacement amplitude and phase angle. [16]
2. Discuss the application of Modal superposition method for finding the response of MDOF system. [16]
3. Determine the natural frequencies of vibration and corresponding mode shapes for a single bay three storied building of width 4 m and constant storey height of 3 m. The building has lumped floor masses and storey stiffnesses (Top to Bottom) as follows m1 = 0.2 kN sec2 /mm; m2 = 0.35 kN sec2 /mm; m3 = 0.25 kN sec2 /mm k1 = 70 kN / mm; k2 = 132 kN / mm; k3 = 190 kN / mm. [16]
4.a) For the building shown in Fig.1, locate the centre of mass. The building has nonuniform distribution of mass as shown in the Fig.4a.
b) The plan of a one-storey building is shown in the Fig.4b. All the columns and beams have the same cross-section. Obtain its centre of Stiffness. [8+8]
5.a) What is an earthquake? What is meant by focus and epicenter of an earthquake?
b) Discuss the main characteristics of seismic waves. [8+8]
6.a) Discuss the direct and indirect effects of earthquakes.
b) Explain the ‘100% + 30% rule’ for non-orthogonal systems and discuss the total number of design load combinations to be considered for complex structural systems such as ‘nuclear reactor’. [8+8]
7. A beam AB is to be designed for positive and negative moments at the supports A and B. Moments at the supports A and B are, MA= – 88 kNm and +37 kNm; MB= – 102 kNm and +12 kNm. The characteristic dead and live loads are 14 and 8 kN/m respectively.
The span of beam is 8m; beams are 300 × 550 mm with 150 mm slab. Assume M35 concrete and Fe 500 grade steel. The structure is situated in seismic zone IV. Design both the flexure and shear reinforcement as per IS 13920. [16]
8.a) Discuss the strategies in the location of Structural walls in buildings with neat sketches.
b) Discuss the behaviour of Squat and Tall shear walls with neat sketches. [8+8]
EARTHQUAKE RESISTANT DESIGN :
1. A SDOF system is subjected to a harmonic loading defined by P(t) = P0 Sin ?t. Derive the expression for the dynamic displacement for the under damped vibrations. Sketch the response. [16]
2. Discuss the method by which the response of MDOF system is reduced to response of SDOF system. [16]
3. Determine the natural frequencies of vibration and corresponding mode shapes for
a single bay three storied building of width 4 m and constant storey height of 3 m. The building has lumped floor masses and storey stiffnesses (Top to Bottom) as follows: m1 = 0.2 kN sec2 /mm; m2 = 0.3 kN sec2 /mm; m3 = 0.25 kN sec2/mm k 1 = 70 kN / mm; k2 = 120 kN / mm; k3 = 200 kN / mm. [16]
4.a) For the building shown in Fig.4a, locate the centre of mass. The building has non- uniform distribution of mass as shown in the Fig.4a.
b) The plan of a one-storey building is shown in the Fig.4b. All the columns and beams have the same cross-section. Obtain its centre of Stiffness. [8+8]
5.a) Explain causes of earthquake with the help of ‘plate-tectonics’ theory.
b) An earthquake causes an average of 3.0 m strike-slip displacement over a 110 km long, 28 km deep portion of a transformed fault. Assuming the average rupture strength along the fault as 206kN/m2, estimate the seismic moment, moment magnitude and seismic energy. [8+8]
6.a) Discuss the advantages and disadvantages of flexible and stiff structures.
b) How does earthquake resistance of a structure affected by:
i) Unsymmetry and
ii) Elongated shape of buildings. [8+8]
7. A beam AB is to be designed for positive and negative moments at the supports A and B. Moments at the supports A and B are, MA= – 99 kNm and +28 kNm; MB= – 108 kNm and +12 kNm. The characteristic dead and live loads are 14 and 9 kN/m respectively.
The span of beam is 12 m, beams are of 300 × 600 mm with 150 mm slab. Assume M35 concrete and Fe 415 grade steel. The structure is situated in seismic zone IV. Design both the flexure and shear reinforcement as per IS 13920. [16]
8. Discuss the design procedure for squat shear wall as per IS 13920. [16]