桩-土-结构相互作用动力离心模型试验方案设计研究

以滨江广场地基土、桩基及上部结构为研究对象,设计了三者相互作用的动力离心模型试验方案。对桩-土-结构地震响应的动力离心试验进行相似关系设计和相似材料的研究,选择了对体系地震响应具有控制作用的参数,根据Buckingham法,计算了土、桩基及上部结构的相似常数,建立相似关系。对模型材料的物理力学特性进行试验,测得模型土的级配曲线和抗剪参数;基于计算结果,根据桩的抗弯刚度相似进行了模型桩的设计。根据桩-土-结构相互作用的特性对模型测试元器件进行了合理的布设,并设计了地震波及加载工况。所得结果为即将开展的桩-土

Research on Test Plan Design of Dynamic Centrifuge Test Model with Pile-Soil-Structure Interaction

Taking foundation soil, pile foundation and superstructure of Riverside Plaza as the study object, the dynamic centrifugal model test plan with pile-soil-structure interaction was designed. The research on similar design and similar materials was carried out for dynamic centrifugal test on seismic responses of the pile-soil-structure. Parameters which have the control action on the seismic response of the system were selected according to Buckingham dimensional analysis method, to calculate the similar constant of pile-soil-structure, and establish the similar relationship. The physical and mechanical property of model material was tested and the grading curve and shear strength parameter of model soil were obtained. The model pile was designed as per the similar flexural rigidity of pile based on the calculation result. According to the pile-soil-structure interaction, the test elements of model were reasonably arranged and the earthquake wave and loading condition were designed. All results laid a foundation for the dynamic centrifugal test with pile-soil-structure interaction to be performed.