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在常规的高层结构设计中,一般将上部结构和基础部分分开设计,即分析上部结构时认为底部固接,忽略基础和地基土的变形对其内力的影响。而实际上部结构-基础-地基三者共同工作、协同变形,基础和地基变形会引起上部结构内力的重分布,上部结构对基础的变形也具有一定的限制作用。因此,设计常用方法与实际情况存在一定的差异。以某高层结构为例,运用ANSYS软件建立上部结构-筏板基础-地基共同工作的分析模型,分析考虑三者共同工作和单独考虑上部结构两种情况下结构构件内力的变化情况;并进一步分析不同的地基土弹性参数对上部结构内力的影响规律,为设计提供参考。
In the conventional high-rise structure design, the superstructure and the foundation are generally designed separately. That is to say, when the superstructure is analyzed, the bottom is fixed and the influence of the deformation of the foundation and the foundation soil on the internal force is ignored. In fact, the substructure-foundation-foundation work together, and the deformation, foundation and foundation deformation will cause the redistribution of the internal forces in the superstructure. The superstructure also has a certain limiting effect on the deformation of the foundation. Therefore, the design of common methods and the actual situation there are some differences. Taking a high-rise structure as an example, the analysis model of the superstructure-raft foundation-foundation interaction is established by using ANSYS software. The analysis of the changes of the internal forces of the structural members considering the three work together and the superstructure alone is taken into consideration. The influence of different soil elastic parameters on the internal force of the superstructure, which provides reference for the design.