Prediction of Liquefaction-Induced Lateral Spreading Structural Demands on Bridge Foundation Using Deterministic and Numerical Methods
Publication: Geo-Congress 2023
ABSTRACT
In this study, structural demands before, during, and after liquefaction-induced lateral spreading were predicted for the deep foundation at an end-bent of a proposed bridge located at the US Highway 76 over Lynches River, Florence/Lee County, South Carolina (SC) site, which is susceptible to strong ground motions and liquefaction. The deterministic method outlined in the South Carolina Department of Transportation (SCDOT) Geotechnical Design Manual (GDM) 2022 and CALTRANS 2017 was used by considering the during- and after-liquefaction scenarios. For numerical study, the finite element software RS2 (v11.0), capable of modeling soil-pile interaction, was used to analyze before-, during-, and after-liquefaction scenarios considering multiple earthquake scenarios. Results show that the structural demands predicted from the numerical method were lower than those obtained from the deterministic method for both during- and after-liquefaction scenarios, except the bending moment induced by the 1994 Northridge and the 1971 San Fernando earthquakes for the during-liquefaction scenario.
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Geo-Congress 2023
Pages: 240 - 250
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Published online: Mar 23, 2023
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