基于液化效应的地下结构动力反应及简化分析方法研究  

Research on dynamic response of underground structure and simplified analysis method based on liquefaction effect

作　　者：左熹[1] 毛昆明[1] 周恩全[2] ZUO Xi;MAO Kunming;ZHOU Enquan(Institute of Architectural Engineering,Jinling institute of technology,Nanjing 211169,China;Faeuhy of Civil Engineering and Meehanics,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]金陵科技学院建筑工程学院,江苏南京211169 [2]江苏大学土木工程与力学学院,江苏镇江212013

出　　处：《自然灾害学报》2018年第6期98-108,共11页Journal of Natural Disasters

基　　金：国家自然科学基金项目(51408281);江苏省自然科学基金项目(BK20140108;BK20150519);江苏省青蓝工程资助项目(2016)~~

摘　　要：为了分析液化条件下的地下结构动力反应以及得到相应的简化分析方法,采用数值计算方法,基于ABAQUS软件平台,获得了液化场地的孔压效应,得出了液化场地对地下结构动力作用影响,分析了地下结构的损伤特性和变形特征。结果表明:随着峰值加速度的增加,场地的液化区域逐渐增大,孔压比的极大值区域出现在地下结构顶板上方;由于上覆土层的影响,地下结构的损伤以压缩损伤为主;在相同地震动作用下,液化场地中的地下结构损伤程度大于非液化场地中的地下结构损伤程度,并且得出地下结构的变形是以侧向变形为主。针对液化场地对地下结构的作用效应,建立土-地下结构体系的简化力学模型,得出液化土体中地下结构侧向变形的解析解,并通过了数值分析结果验证了该简化分析方法正确性和可行性。Based on the ABAQUS software platform to analyze the effects of pore pressure and to study the dynamic response of underground structures on the liquefaction site,it obtained the damage characteristic and deformation features of the underground structure,in order to research dynamic response of underground structure and simplified analysis method based on liquefaction effect.The results showed that with the increase of peak acceleration,the liquefaction area gradually expanded.The maximum value area of the pore pressure ratio appears above the underground structure roof;due to the influence of the overburden,the damage of underground structure is mainly to compression injuries;At the same ground motion,the damage degree of underground structure in liquefaction site is greater than non-liquefied site,then concluded that deformation of underground structure is mainly lateral deformation.According to the liquefied ground effect on the underground structure,it establish a simplified mechanical model of soil-underground structure system and obtain analytical solution of lateral deformation of underground structures,and then it verified the correctness and feasibility of the simplified method through the results of numerical analysis.

关 键 词：液化效应 地下结构 动力反应 简化分析方法 地震动 

分 类 号：X43[环境科学与工程—灾害防治] X9