自复位墙防震结构基于力设计方法研究  

Force-based seismic design method for self-centering wall structures

作　　者：周颖[1] 王睿 田文博 ZHOU Ying;WANG Rui;TIAN Wenbo(State Key Laboratory of Disaster Reduction in Civil Engineering,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

出　　处：《建筑结构学报》2022年第7期11-20,共10页Journal of Building Structures

基　　金：国家自然科学基金项目(52025083);上海市科委项目(19DZ1201200)。

摘　　要：自复位墙防震结构作为典型的可恢复功能结构,具有变形能力强、结构损伤小等特点,可显著减少建筑结构的震后修复费用。现有研究对自复位墙防震结构一般采用基于位移设计方法进行设计,而先结构选型、后位移校核的基于力设计方法尚未形成。为此,提出了自复位墙防震结构基于力设计方法,以规范中规定的地震影响系数曲线为依据,考虑了多水准抗震设防时结构的最大层间位移角限值要求。以一幢6层自复位墙防震结构为例,采用有限元分析进行了基于力设计方法的位移验算有效性验证,并基于理论推导,对基于力设计方法和基于位移设计方法进行了对比,证明了两种设计方法理论基础的一致性。研究表明,基于力设计方法可作为对基于位移设计方法的补充,满足自复位墙防震结构的设计需求。As a typical resilient structural system,self-centering wall structures are characterized by the high ductility and low structural damage,enabling a remarkable reduction on the cost of post-earthquake structural repairment.It is generally suggested that self-centering wall structures should be designed through a displacement-based seismic design method.However,a force-based seismic design method for such systems,with which the structural plan should be arranged first and the inter-story drift be checked later,is rarely studied.Thus,a force-based seismic design method for self-centering wall structures was proposed,where the seismic influence coefficient curve of the national standard was adopted.The inter-story drift targets of multi-level seismic fortifications were considered based on engineering practice,and a six-story self-centering wall structure was selected as an example to verify the feasibility of the inter-story drift checking process of this method through finite element analysis.Meanwhile,the force-based seismic design method and the displacement-based seismic design method were compared based on theoretical derivation,through which the consistency of the theoretical background of these two methods was verified.The force-based seismic design method is eventually proved to be suitable for the design of self-centering wall structures as a supplement to the displacement-based seismic design method.

关 键 词：自复位墙 基于力设计方法 基于位移设计方法 多水准抗震设防 

分 类 号：TU352.104[建筑科学—结构工程] TU312.1