Seismic Response Analysis Based On Simplified Model Of Shanghai Center Tower Considering Soil-structure Interaction

Based on soil-structure interaction theory，this article analysized the differencesof Shanghai Center Tower’s dynamic response under earthquake between twomodels，one model considerd the influence of soil，the other one did not consider theinfluence of soil．The author created a finite element model of Shanghai Center Tower by usingsoftware ANSYS．This model contained two parts：the superstructure and thesubstructure．The superstructure model was converted from MARC finite elementmodel which was created by Tsinghua University．The basement in substructure wasextended from superstructure and the equivalence of soil and pile was used to simplifythis region．Meanwhile，in order to reduce the computational costs， DP model andsuper unit were respectively used into plastic zone soil and elastic zone soil．The article made dynamical analysis on the whole model considered the soil-structure interaction and the superstructure model based on assumption of rigidfoundation．The analysis results showed that：after considering the soil-structureinteraction，the structure’s period was lengthened，and the displacement peak ofstructure’s top point was also enlarged．However，the structural deformation andstorey drift decreased， the influence of soil-structure interaction could not beignored．The article still introduced the concept of modified earthquake wave， that was：extracted the bottom of structure’s acceleration and stacked the acceleration that couldbe seen as a kind of external load with original earthquake wave，and got the modifiedearthquake wave．This method could provide conditions for getting the dynamicresponse of the same structure’s refined model which considered the soil-structureinteraction。...