In this study, we evaluated the simultaneous effect of flexural displacement and earthquake on steel pipe sheet pile foundations. First, the required performance of bridge under the simultaneous effect of flexural displacement and earthquake was set. And then, the effect of earthquake was determined using 2D FLIP with a bridge-foundation-soil model. Based on the above results, the steel pipe sheet pile foundations were verified by three-dimensional framework analysis, and it was confirmed that there was no safety problem.
