Chapter
Aug 19, 2013
What if We Don't? An Economic View of Seismic Upgrade
Authors: Darin Johnson [email protected], Scott Kuebler [email protected], Jeri Bernstein [email protected], and Dave Cook [email protected]Author Affiliations
Publication: Ports 2013: Success through Diversification
Abstract
This paper provides an overview of the unique approach taken by a multi-discipline team consisting of Washington State Ferries (WSF) personnel, structural and geotechnical engineers, and economists to perform a risk assessment of a portion of WSF's aging timber trestle inventory. The intent of the assessment was to establish the cost-effectiveness of trestle replacement compared to refurbishment by quantifying risk for a range of seismic events and incorporating that risk into WSF's Asset Management Model. Failure scenarios developed using site-specific characteristics - such as trestle condition and site seismicity - were coupled with life cycle cost modeling techniques to assess the risks associated with doing nothing, refurbishing the existing trestles, or completely replacing the trestles at seven ferry terminals. This paper describes the approach developed to create an economic model and evaluate the efficacy of trestle upgrade and replacement options. A case study of the trestle at the Vashon Island terminal is included to demonstrate direct implementation of the approach and the results obtained.
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© 2013 American Society of Civil Engineers.
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Published online: Aug 19, 2013
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BIS Consulting, LLC, 8212 37th Ave. SW, Seattle, WA 98126. E-mail: [email protected]
S.E.
KPFF Consulting Engineers, 2407 North 31st Street, Suite 100, Tacoma, WA 98407. E-mail: [email protected]
S.E.
Washington State Ferries Terminal Engineering, 2901 3rd Avenue, Suite 500, Seattle, WA 98121-3014. E-mail: [email protected]
GeoEngineers Inc., 600 Stewart Street, Suite 1700, Seattle, WA, 98101. E-mail: [email protected]
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