DSHA - Deterministic Seismic Hazard Analysis Deterministic...

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Deterministic Seismic Hazard Analysis Deterministic Seismic Hazard Analysis CEE 431/ESS465 CEE 431/ESS465
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Deterministic Seismic Hazard Analysis Deterministic Seismic Hazard Analysis Earliest approach taken to seismic hazard analysis Originated in nuclear power industry applications Still used for some significant structures - Nuclear power plants - Large dams - Large bridges - Hazardous waste containment facilities - As “cap” for probabilistic analyses
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Corps of Engineers Regulation 1110-2-1804 (1995) Sec. 5.h.2.a Deterministic seismic hazard analysis (DSHA). The DSHA approach uses the known seismic sources sufficiently near the site and available historical seismic and geological data to generate discrete, single-valued events or models of ground motion at the site. Typically one or more earthquakes are specified by magnitude and location with respect to the site. Usually the earthquakes are assumed to occur on the portion of the site closest to the site. The site ground motions are estimated deterministically, given the magnitude, source-to-site distance, and site condition. Deterministic Seismic Hazard Analysis Deterministic Seismic Hazard Analysis
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Consists of four primary steps : 1. Identification and characterization of all sources 2. Selection of source-site distance parameter 3. Selection of “controlling earthquake” 4. Definition of hazard using controlling earthquake Deterministic Seismic Hazard Analysis Deterministic Seismic Hazard Analysis
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Identification and characterization of all sources Identification All sources capable of producing significant ground motion at the site Large sources at long distances Small sources at short distances Characterization Definition of source geometry Establishment of earthquake potential Deterministic Seismic Hazard Analysis Deterministic Seismic Hazard Analysis
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Identification and characterization of all sources Which sources are capable of producing significant motion at the site of interest? What is significant motion?
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DSHA - Deterministic Seismic Hazard Analysis Deterministic...

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