Local Site effects for ground motion acceleration and amplification at Bahrah, Saudi Arabia.”.

DOI: 10.48129/kjs.12349

Authors

  • Faisal Rehman Department of Earth Sciences, University of Sargodha, Sargodha, Pakistan.
  • Abdullah M. Alamri Department of Geology & Geophysics, King Saud University, Riyadh, 11451, Saudi Arabia
  • Sherif M. El-Hady Seismology Department, National research institute of Astronomy and Geophysics (NRIAG), Egypt
  • Hussein M. Harbi Department of Earth Sciences, University of Sargodha, Sargodha, Pakistan.
  • Faisal Rehman Quaid-i-Azam University
  • Muhammad Fahad Ullah Department of Earth Sciences, University of Sargodha, Sargodha, Pakistan.
  • Saif ur Rehman Institute of Geology, University of the Punjab, Lahore, Pakistan,

DOI:

https://doi.org/10.48129/kjs.12349

Abstract

In present study, local site effects are evaluated for ground motion acceleration and amplification at Bahrah which is covered by quaternary alluvial wadi deposits. Spectral matching technique is utilized to generate well matched ground motion time series based on the results of the PSHA and the deaggregation process. One-dimensional simulation is carried out for equivalent linear seismic response analyses for soil layers. Results of One-dimensional site response analysis are interpolated to generate maps that account for ground motion accelerations and amplifications at top of the soil for selected spectral periods (PGA, 0.1, 0.2 and 2) for 475 years return period. The maps show the ground shaking rather than the probability of damage to buildings. The undulation of bed rock topography and existence of deep soft sediments are reflected considerably on the results of the study area. The surface ground motion maps show that the seismic hazard level in Bahrah is moderate.

Published

02-04-2022

Issue

Section

Earth & Environment