连梁耦联作用对联肢钢板剪力墙稳定与变形影响的分析  

The Influence of Coupling Action of Coupling Beam on Stability and Deformation of Coupled Steel Plate Shear Wall

作　　者：吴星煌 郝际平[1] 钟炜辉[1] 田炜烽[1] Xinghuang Wu;Jiping Hao;Weihui Zhong;Weifeng Tian(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,西安710055

出　　处：《钢结构（中英文）》2020年第12期29-35,共7页Steel Construction（Chinese & English）

基　　金：国家自然科学基金面上项目(51878541);陕西省自然科学基础研究计划(2019JQ-754)。

摘　　要：联肢钢板剪力墙是在钢板剪力墙间引入连梁发展而来的新型抗侧力体系,连梁的引入改变了结构的抗倾覆机制,从而影响柱子的稳定与结构的变形。故将连梁截面作为变量,研究连梁与墙肢连接形成的耦联作用对联肢钢板剪力墙稳定与变形的影响。取一实际工程的足尺6层联肢钢板剪力墙作为原型,通过改变连梁高度与腹板厚度,利用ABAQUS进行单调与往复加载模拟,分析结构的力学性能与变形能力。分析结果表明:连梁产生的耦联作用有减小外柱受压从而减缓结构失稳的作用,随着连梁截面高度的增加,结构抗剪承载力逐渐提升,但提升程度越来越小且承载力稳定性有所降低;侧移达1/50位移角前,结构处于正常使用阶段,1/30位移角后,结构承载力显著下降而面临倒塌;以延性为判别指标时耦联比有最优段,耦联比从0.6到1.2的过程中,结构延性基本表现出迅速上升→平缓上升→缓慢下降→迅速下降的现象,其中平缓上升段对应耦联比的最优段。Coupled steel plate shear wall is a new type of lateral resisting system by linking coupling beam between steel plate shear walls.The introduction of coupling beam changes the anti-overturning mechanism,thus affecting the column’s stability and structural deformation.Therefore,the cross-section of the coupling beam was used as a variable to study the influence of the coupling action derived from coupling beam on the stability and deformation of the coupling steel plate shear wall.A full-scale 6-story steel plate shear wall was taken as the prototype,changing the coupling beam section,then Abaqus was used to simulate the monotonic and cycle loading.The results show that,the coupling effect of coupling beam can reduce the compression of the outer column then lighten the structural instability.With the increase of section height of coupling beam,the structural shear capacity is gradually increased,but the increasing trend is smaller and the instability of the shear capacity is increased gradually.Before the drift ratio reaches 1/50,the structure is in normal use stage,while the shear capacity decreases significantly and the structure is in the risk of collapse after exceeding the drift ratio of 1/30.When ductility is used as criterion,the coupling ratio has an optimal interval,as it rises from 0.6 to 1.2,the structural ductility basically shows the phenomenon of rapid rise→gentle rise→slow decline→rapid decline.The coupling ratio of the gentle rise stage can attain the optimal interval.

关 键 词：联肢钢板剪力墙 ABAQUS数值模拟 抗震性能 耦联比 

分 类 号：TU398.2[建筑科学—结构工程]