A Coupled FE-BE Model for Nonlinear Soil-Structure Inter- action Analysis

本研究计划的目的是探讨非线性土体特性对土-结构体系在地震荷载作用下的反应的影响。该项目涉及：(a)发展一个数值模型，以代表要研究的各种现象，例如土壤的力学反应和非反射边界条件；(b)通过首先将模型的线性分量的预测与简化系统的封闭形式解析解进行比较，然后通过将非线性引入这些简化系统来验证模型；(c)校正数值模型后，使用该模型分析和解释台湾洛东缩小核安全壳的数据；其中土壤非线性和土壤结构相互作用的影响占主导地位。该组件由电力研究所（EPRI）联合赞助。

The objective of this research program is to investigate the effects of nonlinear soil behavior on the response of soil- structure systems to earthquake loading. The project involves: (a) the development of a numerical model to represent the various phenomena to be studied, such as the mechanical response of the soil and nonreflecting boundary conditions; (b) validation of the model by first comparing the predictions of the linear component of the model against closed- form analytical solutions for simplified systems, then by introducing nonlinearities into these simplified systems; and (c) following calibration of the numerical model, use of this model to analyze and interpret the data for a scaled-down nuclear containment vessel in Lotung, Taiwan, where soil nonlinearities and soil-structure interaction effects are dominant. This component is jointly sponsored by the Electric Power Research Institute (EPRI).