Equivalent 1D Ground Response Analysis (GRA) of Black Cotton Soil for Three Different Sites Near Indore City

Abstract

Seismic hazards have proved to be the most devastating having the potential for causing the greatest damages. The natures of forces and the energy that is released during an earthquake event are random in nature and unpredictable. To assess the hazards caused due to an earthquake, the quantification of the hazards becomes very important. As the soil profile of the site plays an important role in contributing to the hazards, ground response analysis is carried out for detailed analysis. In the current study, 1D ground response analysis has been carried out at three different locations near Indore, namely Reti Mandi (Indore), Manchaman, and Mahakal Temple (Ujjain) which have been subjected to two different earthquake motions namely Bhuj and Kobe’s Earthquake. Linear analysis using DEEPSOIL to estimate the free-field ground response has been carried out. The input parameters considered are input ground motion, shear wave velocity, damping ratio 5%, and dynamic soil properties. Standard penetration tests have been carried out at all the three sites at Indore. It is observed that the soil layers under study result in similar PGA after analyzing from both earthquake motions.