中文摘要：

研究了水平地震作用下层状地基土中桩基-建筑物的动力相互作用的特性，总结出各参与要素对动力相互作用体系地震响应的作用规律，并探讨了桩-土-上部结构共同作用程度的简单判别方法；编制了群桩-分层土-上部结构的动力相互作用分析及优化设计程序．实例分析表明，在带桩结构工程中应用该程序进行抗震作用下的优化动力计算是简单可行的，可由体系周期放大因子的值来确定采取相互作用设计计算与否，为桩承结构设计提供了新的分析思路．

英文摘要：

This paper investigated the dynamic effects on the interaction of pile-supported structures subjected to lateral seismic load at layered-soil media. A preliminary method was proffered with the combination of present aseismatie design codes and the concept of soil-structure interaction. Considering the influence of several participant factors on seismic response, some method were summarized and simplified formulae were used to distinguish the interactive degree of whole system under discussion. A dynamic interactive program including optimization design of pile-supported structures is introduced. Numerical computation has proved that it is feasible to develop the method for dynamic analysis and a new design idea by defining the multiplier factor that will affect the interaction effect of structures is presented for pile-supported structures. The aseismatie design advices for pile-supported structures are provided with proper theoretical procediues.