Seismic Stability of St. Stephen Hydropower Plant, South Carolina

A performance-based analysis was used to assess the seismic performance of St. Stephen Powerhouse erection bay. Two site-specific design response spectra were used to evaluate the structure. These included a 2,475-year probabilistic earthquake event and a deterministic Maximum Credible Earthquake pl...

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Bibliographic Details
Main Authors: Ebeling, Robert M, Hall, Robert L, Strom, Ralph W, Yule, Donald E, Chowdhury, Mostafiz
Format: Report
Language:English
Subjects:
DYNAMIC ANALYSIS
EARTHQUAKES
FINITE ELEMENT ANALYSIS
HYDRAULIC POWER
HYDROPOWER
MAXIMUM CREDIBLE EARTHQUAKE
MAXIMUM LIKELIHOOD ESTIMATION
Numerical Mathematics
PERFORMANCE-BASED ANALYSIS
POWERHOUSE
PROBABILITY
RESPONSE SPECTRUM
SEISMIC STABILITY EVALUATION
SEISMIC WAVES
Seismology
SPECTRA
STABILITY
STANDARD DEVIATION
Statistics and Probability
SUPERSTRUCTURES
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Summary:A performance-based analysis was used to assess the seismic performance of St. Stephen Powerhouse erection bay. Two site-specific design response spectra were used to evaluate the structure. These included a 2,475-year probabilistic earthquake event and a deterministic Maximum Credible Earthquake plus one standard deviation event. The St. Stephen Powerhouse superstructure is vulnerable to collapse for earthquake hazards with return periods greater than 500 years. The structure does not meet the basic safety objective (collapse prevention) of the Federal Emergency Management Agency Prestandard and Commentary for the Seismic Rehabilitation of Buildings, FEMA 356-357. Prepared for U.S. Army Engineer District, Charleston, SC. The original document contains color images.