Abstract
Stability of infrastructure during earthquakes demands ground response analysis to be carried out for a particular region as the ground surface may suffer from amplified Peak Ground Acceleration (PGA) as compared to bedrock PGA causing instability. Many studies have been carried out the world over using different techniques but very few studies have been carried out for the northern part of India, Punjab situated at latitude of 31.326° N and longitude of 75.576° E, which is highly seismic and lies in seismic zone IV as per IS:1893-2016. In this paper 1-D equivalent non-linear ground response analysis has been conducted for sixteen sites of Jalandhar region, Punjab (India) by using five earthquake motions. Input ground motions are selected from the worldwide-recorded database based on the seismicity of the region. Based on the average SPT-N values, all the sites have been classified as per the guidelines of National Earthquake Hazard Reduction program (NEHRP). Shear modulus (G) was calculated using correlation between G and SPT–N Value. The ground surface PGA varies from 0.128 to 0.292 g for the sites of Jalandhar region with Amplification Factor values varying from 1.08 to 2.01. Hence the present study will be useful to the structural designers as an input towards suitable earthquake resistant design of structures for similar sites.
Highlights
The Indian Subcontinent has been witnessing the damaging Earthquakes since ancient times
In major part of Haryana state, carved out of the former state of East Punjab, the studies conducted by Puri and Jain (2015) [3] highlighted that codal acceleration values are found to be very conservative, and the local site conditions like the topography, nature of bed rock and the geometry of the deposits are the primary factors that influence the local modification of the wave motion between the bed rock and soil outcrop and have a profound influence on the ground response during an earthquake
Deterministic Seismic Hazard Analysis of few sites of Jalandhar city conducted by Naval and Chandan (2017) [5] revealed the variation of Peak Ground Acceleration values from 0.14g to 0.454g that was found to be much higher as compared to the values published in IS1893 (2016) [6]
Summary
The Indian Subcontinent has been witnessing the damaging Earthquakes since ancient times. Deterministic Seismic Hazard Analysis of few sites of Jalandhar city conducted by Naval and Chandan (2017) [5] revealed the variation of Peak Ground Acceleration values from 0.14g to 0.454g that was found to be much higher as compared to the values published in IS1893 (2016) [6]. Similar study on another City of Punjab, Ludhiana by the same authors using Deterministic Seismic Hazard Analysis by dividing whole city into 0.0250×0.0250 grids and using ground motion equation developed by National Disaster Management Authority (NDMA), revealed the higher Peak Ground Acceleration as compared to Indian codal stipulations.
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