可液化场地输水泵站地下结构抗震性能分析  

SEISMIC PERFORMANCE ANALYSES OF UNDERGROUND STRUCTURE OF WATER DIVERSION PUMPING STATION IN LIQUEFIABLE SITE

作　　者：曾章波 黄华 裴志勇 郑浩[2] 方火浪[2] ZENG Zhangbo;HUANG Hua;PEI Zhiyong;ZHENG Hao;FANG Huolang(Powerchina Huadong Engineering Corporation Limited,Hangzhou 311122,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,杭州311122 [2]浙江大学建筑工程学院,杭州310058

出　　处：《低温建筑技术》2023年第2期66-70,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金资助项目(51878605)。

摘　　要：土层液化是引起地下结构在地震中遭受破坏的重要原因之一.文中以某可液化场地中的输水泵站地下钢筋混凝土结构为研究对象,利用OpenSees中的钢筋混凝土纤维模型和土体弹塑性本构关系,建立了考虑土—结构相互作用的非线性有限元模型.采用固—液两相全耦合有效应力法对可液化场地土—结构体系进行动力分析,研究了场地土和结构的地震响应及结构抗震承载性能.结果表明强震引起结构两侧土体液化,导致周围土体和结构产生较大的水平变形,其中土体的最大剪应变约为2%;边墙与中板和底板交接处的内力较集中,部分墙板呈现较强的非线性弯曲变形特征;结构的抗剪需求能力比和层间位移角均在规范限值范围内,满足强震作用下的抗震性能要求,为同类工程设计提供参考借鉴.Soil liquefaction is one of the important reasons for the damage of underground structures in earthquakes.Taking the underground reinforced concrete structure of water diversion pumping station in a liquefiable site as the research object,this paper establishes a nonlinear finite element model considering soil-structure interaction by us-ing the reinforced concrete fiber model and the elastic-plastic constitutive relationship of soil in OpenSees.The soil-structure system of liquefiable site is dynamically analyzed by using the solid-liquid two-phase fully coupled effective stress method,and the seismic response of site soil and structure as well as the seismic bearing perfor-mance of structure are studied.The results show that the soil liquefaction on both sides of the structure caused by strong earthquake leads to large horizontal deformation of the surrounding soil and structure,and the maximum shear strain of the soil is about 2%.The internal forces at the junctions of side walls,middle plates,and bottom plates are relatively concentrated,and some walls and plates show strong nonlinear bending deformation characteristics.The shear demand capacity ratio and inter-story displacement angle of the structure are within the limit of the code,meeting the seismic performance requirements under strong earthquakes,which provides the reference for similar en-gineering design.

关 键 词：地下结构 土层液化 动力响应 抗震性能 

分 类 号：TU435[建筑科学—岩土工程]