Deep soil seismic hazard assessment: analyzing the impact of local site effects by stochastic site response analysis—a comparative approach

Incorporating local site effects into seismic hazard analysis, especially for deep soil sites, is crucial. This study describes probabilistic seismic hazard analysis (PSHA) incorporating site effects for a deep soil site in Pakistan. Bedrock hazard is assessed in FRISK88M using a rigorous logic tree...

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Veröffentlicht in:Bulletin of engineering geology and the environment 2024-06, Vol.83 (6), p.237, Article 237
Hauptverfasser: Ali, Muhammad Salman, Saeed, Kashif, Jianxun, Ma, Dong, Luo, Ali, Liaqat
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container_start_page 237
container_title Bulletin of engineering geology and the environment
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creator Ali, Muhammad Salman
Saeed, Kashif
Jianxun, Ma
Dong, Luo
Ali, Liaqat
description Incorporating local site effects into seismic hazard analysis, especially for deep soil sites, is crucial. This study describes probabilistic seismic hazard analysis (PSHA) incorporating site effects for a deep soil site in Pakistan. Bedrock hazard is assessed in FRISK88M using a rigorous logic tree. Equivalent linear site response analysis (SRA) is performed in STRATA and captured the soil variability properties via Monte Carlo simulations. We proposed a hybrid approach in this study which utilizes the outcomes of Random Vibration Theory (RVT) and multiple Time Histories (TH) approach to assess the site-specific amplifications. Incorporating site amplifications transforms rock ground motion models into site-specific then we performed soil PSHA in FRISK88M. The analysis revealed that RVT overpredicts (3–17%) while TH underpredict (1–6%) hazard as compared to the hybrid approach at all return periods. The hybrid approach proposed in this study provides an innovative, effective and reliable estimates.
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subjects Amplification
Earth and Environmental Science
Earth Sciences
Earthquakes
Foundations
Geoecology/Natural Processes
Geoengineering
Geological hazards
Geotechnical Engineering & Applied Earth Sciences
Ground motion
Hazard assessment
Hydraulics
Impact analysis
Monte Carlo simulation
Nature Conservation
Original Paper
Random vibration
Response analysis
Seismic hazard
Soil
Soil properties
Soils
Vibration
title Deep soil seismic hazard assessment: analyzing the impact of local site effects by stochastic site response analysis—a comparative approach
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