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

本研究的目的是研究土的非线性特性对土-结构体系在地震荷载作用下反应的影响。该项目涉及：(A)开发一个数值模型，以表示要研究的各种现象，如土壤的机械响应和非反射边界条件；(B)首先将模型的线性分量的预测与简化系统的封闭解析解进行比较，然后将非线性引入这些简化系统，从而验证该模型；以及(C)在校准数值模型之后，利用该模型对台湾罗东某核安全壳小型化后的数据进行分析解释，其中土体非线性和土-结构相互作用效应占主导地位。这一部分由电力研究所(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).