Presented is an application of wave potential formulation (WPF) together with domain reduction method (DRM) to modeling earthquake soil structure interaction (ESSI) behavior in horizontally layered ground under inclined incident seismic waves. Wave potential formulation is used to develop a spatially varying, inclined seismic wave field from incident Primary (P) and Secondary (S) waves that propagate through layered ground. Developed seismic wave field is then used to develop effective forces for Domain Reduction Method that are then used for analyzing ESSI response of a soil structure system. Developed methodology, called WPF-DRM, is verified using analytic solution for a free field response of layered ground subjected to inclined incident waves.

Developed WPF-DRM methodology is illustrated through analysis of an ESSI response of a deeply embedded structure, a small modular reactor (SMR) subjected to incident S wave polarized in vertical plane (SV) with variation in inclinations and frequencies. Presented example highlights the influences of incident wave inclination and frequency on ESSI response of analyzed SMR.

提出了波势公式（WPF）结合域约简方法（DRM）在倾斜入射地震波作用下水平分层地层中地震土结构相互作用（ESSI）行为建模中的应用。波势公式用于从传播通过分层地面的初级（P）和次级（S）波产生空间变化的倾斜地震波场。然后，利用发达的地震波场为有效的力场缩减方法开发有效力，然后将其用于分析土壤结构系统的ESSI响应。使用解析解决方案验证了开发的方法，称为WPF-DRM，该方法可用于层状地面在倾斜入射波作用下的自由场响应。

通过分析深埋结构的ESSI响应来说明已开发的WPF-DRM方法，该结构是小型模块化反应堆（SMR），在垂直平面（SV）中受到极化的入射S波作用下，入射S波的倾角和频率都有变化。提出的示例重点介绍了入射波的倾斜度和频率对所分析SMR的ESSI响应的影响。