A Geophysical Model for Earthquake Hazard Estimation

by Anne S. Kiremidjian, Standford Univ, United States,
Shigeru Suzuki, Standford Univ, United States,



Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract:

A method for site hazard estimation from subduction earthquake is developed by combining a time-dependent earthquake occurrence model and a ground motion model into a unified hazard model. The emphasis in this paper is in the ground motion model. For that purpose the geophysical model based on the normal mode method used by Suzuki and Kiremidjian to simulate earthquake ground motions is modified to represent the nonlinear rupture velocity of the faulting process. The rupture velocity process is considered to be random both in time and in space. Displacement response is obtained by superposition of the motion originating from the random rupture segments along a fault.

Subject Headings: Ground motion | Earthquakes | Occupational safety | Simulation models | Mathematical models | Geohazards | Surface fault rupture

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