Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

The conventional source-based method of probabilistic seismic-hazard assessment is considered difficult to conduct for regions lacking adequate information on the source characteristics, or with a paucity of recorded strong ground motion data. Meanwhile, the historic method is unreliable in estimating the hazard at low probability. This paper proposes a midway approach, derived from the source-based method, yet does not require the characterization of seismic sources. While the method possesses the simplicity of the historic method, it is extended to account for large events that have not been observed historically, in order to improve the reliability of hazard calculation at low probability. Moreover, any site-specific and event-specific characteristics that influence ground motions, such as site effects, and directivity can be incorporated in the early stage of the numerical procedure, which is considered beneficial for microzonation study. This paper demonstrates the application of this method for three cities in China, Iran, and India respectively, in comparison with previous results computed by source-based method.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 24th, 12:00 AM May 29th, 12:00 AM

An alternative Method for Probabilistic Seismic-Hazard Assessment: A Case Study of Three Cities

San Diego, California

The conventional source-based method of probabilistic seismic-hazard assessment is considered difficult to conduct for regions lacking adequate information on the source characteristics, or with a paucity of recorded strong ground motion data. Meanwhile, the historic method is unreliable in estimating the hazard at low probability. This paper proposes a midway approach, derived from the source-based method, yet does not require the characterization of seismic sources. While the method possesses the simplicity of the historic method, it is extended to account for large events that have not been observed historically, in order to improve the reliability of hazard calculation at low probability. Moreover, any site-specific and event-specific characteristics that influence ground motions, such as site effects, and directivity can be incorporated in the early stage of the numerical procedure, which is considered beneficial for microzonation study. This paper demonstrates the application of this method for three cities in China, Iran, and India respectively, in comparison with previous results computed by source-based method.