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为将集总的半无限地基动刚度等效离散给三维厂房结构的筏板基础,借鉴简化的集中质量厂房模型考虑土-结构相互作用(SSI)分析方法,通过力矩等效,推导三维厂房结构考虑SSI的弹簧-阻尼器等效离散模型,并通过模态分析和动力时程分析验证了此等效离散方法的正确性和合理性。这种第一步求解集总的地基动刚度,然后基于通用的有限元软件在三维厂房筏板基础施加弹簧-阻尼器的方法,相对于其他人工边界法更简便易行,便于工程应用。
In order to equivalently disperse the lumped stiffness of the semi-infinite foundation into the raft foundation of the three-dimensional plant structure, the simplified mass-concentration plant model is used to consider the soil-structure interaction (SSI) analysis method and the three-dimensional plant structure Considering the spring-damper equivalent discrete model of SSI, the correctness and rationality of this equivalent discrete method are verified by modal analysis and dynamic time history analysis. The first step is to solve the lumped dynamic stiffness of the foundations, and then apply the spring-damper method to the raft foundation of a three-dimensional plant based on the general finite element software. Compared with other artificial boundary methods, this method is more simple and convenient for engineering application.