重力式摇摆剪力墙抗震性能试验研究  

Experimental Study on Seismic Performance of Self-weight Rocking Shear Wall

作　　者：徐子凡 陈云 应琪 陈超 XU Zifan;CHEN Yun;YING Qi;CHEN Chao(College of Civil Engineering and Architecture,Hainan University,Haikou 570228,China)

机构地区：[1]海南大学土木建筑工程学院,海口570228

出　　处：《结构工程师》2021年第2期110-120,共11页Structural Engineers

基　　金：海南省基础与应用基础研究计划(自然科学领域)高层次人才项目(2019RC109);国家自然科学基金(51428170)。

摘　　要：本文提出了一种新型重力式摇摆剪力墙构造形式,在剪力墙底部设有钢靴并与预埋在基础的高强锚杆连接,高强锚杆仅约束剪力墙的水平侧移,强震时通过竖向荷载实现摇摆剪力墙的自复位。设计并制作了一大比例摇摆剪力墙试件,通过低周反复加载试验,全面研究了该剪力墙的滞回曲线、骨架曲线、刚度退化曲线、附加阻尼系数以及残余变形。研究表明钢靴和锚杆的组合构造形式能够有效约束剪力墙的水平侧移,允许其能够适当转动,并实现了较好保护墙脚的目的;随着竖向荷载的增加,试件的水平承载力和等效黏滞阻尼比也不断增大;剪力墙的残余变形较小,证明其具备较好的自复位性能。推导建立了摇摆剪力墙的弯矩-转角简化三线性分析模型,该模型具有无须迭代分析并精度较好的优点。基于有限元程序ABAQUS分析了其单向推覆加载性能,研究表明该分析模型能较好地模拟试件的损伤破坏形态及峰值荷载。In this paper,a new rocking shear wall with steel boots and the embedded high strength anchor is proposed.The high strength anchor passes through the holes in the steel boots to constrain the horizontal lateral movement of the wall.The wall will be rocking during strong earthquakes to reduce the structural damage.After earthquakes,the wall will restore its original state by vertical loads with negligible residual deformation.A large scale rocking shear wall specimen was designed and fabricated,and the hysteretic performance,stiffness degradation,additional damping coefficient and residual deformation of the shear wall were comprehensively investigated by low-cycle repeated loading test.The research shows that the combination of steel boots and anchor can effectively prevent the horizontal lateral movement of the rocking wall which permit suitable rotational deformation of shear wall and achieve the purpose of protecting the wall foot.With the growing of the vertical load,the lateral bearing capacity and the equivalent viscous damping ratio of the shear wall will be increasing.The residual deformation of shear wall is relatively small,confirming that satisfactory self-centering performance of the shear wall is achieved.A simplified trilinear analysis model of moment-angle of shear wall is established,which can be used to predict the backbone curves of rocking wall with the advantages of no iterative analysis and good accuracy.Based on the finite element program ABAQUS,the push-over analysis of the rocking wall was conducted and the results show that the analytical model can reasonably simulate the damage modes and peak load of the specimen.

关 键 词：摇摆剪力墙 预制混凝土剪力墙 低周反复加载试验 抗震性能 

分 类 号：TU398.2[建筑科学—结构工程]