| The study of the overall seismic performance of Chinese historic timber buildings (CHTB) with high benched foundation is important for maintaining and protecting CHTB. Xi'an east city gate was selected as a research object, because it is a typical CHTB with high benched foundation. Based on soil-structure interation (SSI), it has been studied on earthquake response time-history analysis by ANSYS finite element analysis software. The main research aspects are as follows:(1) The dynamic differential equations of multi-degree-of-freedom system were deduced based on Hamilton principle, and then established dynamic differential equations of this paper's researth system.(2) This paper used two-dimensional visco-elastic artificial boundaries and determined the calculated range of soil when SSI was considered, then established reasonable finite element analysis models.(3) In order to comparing the difference of CHTB's earthquake response between considering SSI and rigid ground hypothesis under the horizontal earthquake action, this paper established four kinds of finite element analysis models and selected three earthquake waves. The maximum displacement and acceleration excitation of special nodes in horizontal direction were obtained. The time-history curves of layer displacement were extracted too. And then, the generalized analysis to the results was carried on. Combined with rigid ground hypothesis, the results show that earthquake response of structure increases obviously if considering SSI.(4) Many parameters were studied on the impaction of them to structure excitation under earthquake action, which including the stiffness of semi-rigid beam-column joints, the weight of thick roof, the elastic modulus of wood, the elastic modulus of rampart's soil and the elastic modulus of foundation's soil and so on.
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