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Alternative Title:At head of title: Final research report, agreement T2695, task 66, liquefaction phase III
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Edition:Final research report.
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Abstract:This report describes the results of a detailed investigation of improved procedures for evaluation of
liquefaction hazards in Washington State, and describes the development and use of a computer
program, WSliq, that allows rapid and convenient performance of improved analyses.
The report introduces performance-based earthquake engineering (PBEE) concepts to liquefaction
hazard evaluation. PBEE procedures have been developed and implemented for evaluation of
liquefaction potential, lateral spreading displacement, and post-liquefaction settlement. A new
model for estimation of the residual strength of liquefied soil was also developed.
The WSliq code was developed to have broad capabilities for evaluation of liquefaction
susceptibility, liquefaction potential, and the effects of liquefaction. It provides new methods for
dealing with the magnitude-dependence inherent in current procedures, and makes the common
“magnitude selection” problem moot via a new multiple-scenario approach and through the use of
PBEE procedures.
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