GIRS-2024-01: Evaluation of Seismic Deformation Analysis Approaches for Bridge Embankments

By: Richard J Armstrong
DOI: 10.34948/N3PK5Z

Abstract: In this study, nonlinear deformation analyses (NDA) and equivalent-static analyses (ESA) approaches were evaluated for a model bridge embankment that was underlain by a non-liquefiable crust layer, a liquefiable medium dense sand layer, and a non-liquefiable deep dense sand layer. The embankment and underlying ground conditions were selected to represent a scenario when a deformation analysis would be required to assess the impacts of earthquake-induced liquefaction of the ground. Four geometry conditions were considered in the study that differed in the dimensions of the medium dense sand and overlying crust. In addition, two densities of the medium dense sand were considered to assess the impacts of different liquefaction responses. Two earthquake scenarios applicable to California were used, one representing a near-field earthquake scenario and the other representing a far-field earthquake scenario. (full abstract available in the report)