土-综合体结构相互作用体系地震反应影响因素研究  

Study on Influencing Factors of Seismic Response of Soil-Complex Structure Interaction System

作　　者：唐元辰 陈清军[1,2] TANG Yuanchen;CHEN Qingjun(State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Department of Disaster Mitigation for Structures,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]同济大学结构防灾减灾工程系,上海200092

出　　处：《结构工程师》2023年第3期61-71,共11页Structural Engineers

基　　金：国家自然科学基金(51778489);国家科技支撑计划课题(2015BAK17B04);科技部国家重点实验室基础研究资助项目(SLDRCE19A-02)。

摘　　要：为探究土-综合体结构相互作用体系地震反应的影响因素,以典型综合体结构为工程背景,利用ABAQUS软件建立土-综合体结构相互作用体系三维有限元模型,采用等效线性化方法考虑土体非线性;选用1995年阪神地震Port Island波,通过反演获取相互作用体系的底部输入地震动。在此基础上,对土-综合体结构相互作用体系进行了地震反应分析,探讨了土-综合体结构接触面模拟、竖向地震波作用效应以及土-结构柔度比对综合体结构地震反应的影响。分析结果表明:土-综合体结构采用接触面模拟方法较共用节点法使得地下结构中柱轴力、剪力、弯矩均有一定程度减小,侧墙轴力、剪力、弯矩则有所增大;考虑竖向地震动作用使得地下结构中柱和侧墙的内力有所增大,其中中柱轴力增幅约达20%;在本文算例中,当土-结构柔度比小于12时,土-综合体结构相互作用效应明显。In order to explore the influencing factors of the seismic response of the interaction system of soilcomplex structure,a case study of a typical complex structure was conducted.A 3D finite element model of the interaction system was established by the finite element code ABAQUS.The equivalent linearization method was used to consider the nonlinearity of the soil.The Port Island wave of the Kobe earthquake in 1995 is selected,and the inverted wave was used as input motion of the interaction system.On this basis,the seismic response analysis of the interaction system was carried out.The effects of soil-structure contact surface simulation,vertical seismic wave action,and soil-structure flexibility ratio on the seismic response of the complex structure were discussed.The results show that the soil-complex structure adopts the contact surface simulation method,which reduces the axial force,shear force and bending moment of the central column,while the axial force,shear force and bending moment of the side wall have increased.Considering the vertical ground motion,the internal force of the central column and side wall has increased,and the axial force of the central column has increased by about 20%.In this paper,when the soil-structure flexibility ratio is less than 12,the interaction effect of soil-complex structure is obvious.

关 键 词：土-综合体结构相互作用体系 地震波反演 接触面模拟 竖向地震动作用效应 土-结构柔度比 

分 类 号：TU435[建筑科学—岩土工程] TU311.3[建筑科学—土工工程]