Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

A coal-fired power plant, Plum Point Energy Station, is being built in the city of Osceola, Arkansas, which is located in the New Madrid Seismic Zone (NMSZ). The project site is characterized as Site Class F, according to ASCE-7-05, because the soils at the site are prone to liquefaction. The depth of soil to rock is approximately 1 kilometer (km). A site-specific response study was required by the building code to determine the uniform hazard spectrum at the ground surface. The site-specific study included a probabilistic seismic hazard assessment to determine the Maximum Considered Earthquake (MCE) spectrum at an equivalent rock outcrop and a one-dimensional site response analysis to determine the ground surface response, given the rock outcrop motions. Spectral matching was used to generate the MCE ground motions at the rock outcrop. The equivalent linear site response code, SHAKE, and two nonlinear site response codes, SUMDES and DEEPSOIL, were used to generate the ground surface acceleration histories. The mechanical properties of the soils in the column were varied to assess the impact of changes in soil properties on free-field response. The function of the equivalent linear and nonlinear site response codes was identified. The amplification of the rock motion to the free field is discussed herein in terms of the site class factors presented in ASCE-7-05.

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

Site-Specific Response Analysis in the New Madrid Seismic Zone

San Diego, California

A coal-fired power plant, Plum Point Energy Station, is being built in the city of Osceola, Arkansas, which is located in the New Madrid Seismic Zone (NMSZ). The project site is characterized as Site Class F, according to ASCE-7-05, because the soils at the site are prone to liquefaction. The depth of soil to rock is approximately 1 kilometer (km). A site-specific response study was required by the building code to determine the uniform hazard spectrum at the ground surface. The site-specific study included a probabilistic seismic hazard assessment to determine the Maximum Considered Earthquake (MCE) spectrum at an equivalent rock outcrop and a one-dimensional site response analysis to determine the ground surface response, given the rock outcrop motions. Spectral matching was used to generate the MCE ground motions at the rock outcrop. The equivalent linear site response code, SHAKE, and two nonlinear site response codes, SUMDES and DEEPSOIL, were used to generate the ground surface acceleration histories. The mechanical properties of the soils in the column were varied to assess the impact of changes in soil properties on free-field response. The function of the equivalent linear and nonlinear site response codes was identified. The amplification of the rock motion to the free field is discussed herein in terms of the site class factors presented in ASCE-7-05.