考虑土-结构相互作用的上海中心大厦地震反应

摘要

In this paper,we developed a simplified model of soil-pile-Shanghai Center Tower by using ANSYS software.The equivalence of soil and pile was used to simplify the study region,and the nearby soil simulated with DP model was plastic region and the periphery soil simulated with super unit was elastic region.We performed seismic response analysis on the whole model considered the soil-pile-structure interaction and the superstructure model based on the assumption of rigid foundation.Finally,we introduced the concept of modified earthquake wave which could provide conditions for getting the dynamic response of the same structure's refined model with consideration of the soil-structure interaction.%采用ANSYS有限元软件建立土-桩-上海中心大厦相互作用简化模型.其中,桩土区采用等效模型,近域土体定为塑性区,用DP模型模拟；外围的土域定为弹性区,用超单元来模拟.对考虑土,桩-结构相互作用的整体结构和以刚性地基为假定的上部结构分别进行地震反应分析,并完成了比较.最后,在整体结构中提取上部结构与下部结构处的加速度反应与原地震波叠加,形成修正地震波,为输入修正地震波能考虑相互作用因素来分析相同结构的精细模型地震反应提供了条件.