Seismic Response and Vulnerability Evaluation of Jammu Region (Jammu and Kashmir)

Abstract

In this study, an attempt is made to generate hazard maps for the Jammu Region (JR) in Jammu and Kashmir in terms of surface peak ground acceleration ( ), liquefaction zonation, and vulnerability index ( ). To do this, the seismic response of 200 sites was examined, and amplification factors at 0.01 s, 0.2 s, 1 s, and 10 s were estimated based on site-specific The calculated factor of safety from field approaches was normalised to produce an integrated liquefaction zonation map. Field data from geophysical testing was also used to generate a vulnerability distribution for the study area. According to the findings, the southern portion of the JR has young sediments and alluvium deposits, resulting in low shear wave velocity ( ) and very strong amplification. As a result, these sites are kept in high to very high vulnerable zones with values of more than 35. This study provides a database for designers working on the construction, development, and expansion-related projects in J&K for developing any prospective earthquake-induced liquefaction mitigation strategies.

Site characterisation based seismic microzonation of the Himalayan region: Implication towards seismic risk assessment for sustainable tunnelling projects

“…Site CharacterisationIn this study, resonance frequency (f 0 ) and shear wave velocity ( ) are assessed based on Microtremor Horizontal to Vertical Spectral Ratio (MHVSR) and Multichannel Simulation with One Receiver (MSOR) techniques(Nakamura 1989(Nakamura , 1996Park et al 1999; El-Adham and El-Hemamy 2006), respectively using Tromino® ENGY 3G (Micromed s.p.a. 2009). The resonance frequency (f 0 ) as an upshot of MHVSR is employed for the zonation of JR for highlighting the local site effects(Ansari et al 2022c). In areas close to mountains, a high resonance frequency (f 0 ) has been recorded.…”