Thapar University 2006 M.E Earthquake Analysis
Thapar Institute of Engineering & Technology
M.E. (2nd Year)
Final Term exam
ST009 (Earthquake Analysis & Design of Structures )
THAPAR INSTITUTE OF ENGINEERING AND TECHNOLOGY, PATIALA
End Semester Test (7/12/2006)
Earthquake Analysis and Design of Structures (ST-009)
Note: Use of SP-16 and IS- 1893-2002 is allowed.
Attempt any five questions
Max Mks: 90 Duration: 3 Hrs
1. (a) |
Explain Reids Elastic Rebound Theoiy of origin of earthquakes. |
3 |
(b) |
Discuss different types of seismic waves. |
5 |
(c) |
What is Response Spectra and give its formulation for SDOF initially at rest. |
5 |
(<J) |
Explain the concept of Seismic Demand Diagrams. |
5 |
2. (a) |
Explain Soft Storey and how it should be accounted for in analysis and design. |
6 |
(b) |
Explain the major damages experienced by R.C buildings during Bhuj earthquake and list the lessons learnt from the same. |
12 |
(a) With reference to performance of RC buildings, explain
(i) Diaphragm Discontinuity
(ii) Re-Entrant Comers
(iii) Vertical and Torsion irregularities
(b) Explain the modeling of the following :
(i) Floor diaphragms
(ii) Soil and foundation models
(a) Explain the following: 9
(i) Non-Conventional Seismic Retrofitting Strategies
(ii) Local Retrofitting Methods.
(b) Discuss the components of Seismic Evaluation Methodology and how are the damages 9 in building components identified during the process.
Consider the data given below for a three storied RC building and calculate the lateral force distribution using Response Spectrum Method (SRSS). Neglect the stiffness of infill walls.
18
Type of structure |
SMRF |
Seismic Zone |
III |
Floor Height |
3.5 m |
Infill wall |
150mm thick |
Materials |
M20 and Fe415 |
Imposed Load |
3.5 kNW |
Size of columns |
300mm X 450mm |
Size of beams |
250mm X 350mm |
Depth of slab |
120mm |
Specific weight of RCC |
25kN/m" |
Specific weight of infill |
20 kN/m'1 |
Type of soil |
Rocky |
Given:
(i) Mass matrix of the lumped model as 30 tons, 60 tons and 60 tons for the top, middle and bottom floor
(ii) Eigen Vector as 0r {-0.033, -0.061, -0.08}, 02={O.O795, 0.064, -0.03} 03= {0.081,-0,054, -0.045}.
Plan of the building is as shown below:
3 X 3 =9 m
5X3= 15 m
Plan of Building
6. Design and Detail the Flexural Member 1, Interior Column 2 and the corresponding 18
Beam- Column Joint for the structure shown above subjected to the following design moments and loads according to IS-13920-1993.
Show the detailing clearly.
Beam 1- Hogging moment 250 kN-m, Sagging Moment 150 kN-m,
Maximum S.F= 150 kN Column 2- Moment = 350 kN-m Axial load = 500 kN
Note: Students can see their evaluated sheets on 12th Dec, 2006 at 10:00 am in the room of the concerned faculty.
Attachment: |
Earning: Approval pending. |