梯形波折钢板剪力墙内嵌墙板抗侧性能研究  

Lateral Resistance Behavior Analysis of Shear Panels in Trapezoidal Corrugated Steel Shear Walls

作　　者：窦超 朱仰泽 解程 谢志栋 杨娜[1] Dou Chao;Zhu Yangze;Xie Cheng;Xie Zhidong;Yang Na(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《天津大学学报（自然科学与工程技术版）》2021年第9期982-990,共9页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金资助项目(51808032);中央高校基本科研业务费资助项目(2020JBM041).

摘　　要：与普通平钢板剪力墙相比,波折钢板剪力墙的抗侧性能与设计方法仍有待研究.利用有限元方法分析波折钢板剪力墙体系中内嵌墙板的抗侧性能和承载机制,提出设计建议.首先,通过对比梯形波折钢板及与之对应的正弦波折钢板的抗侧性能,证明梯形波折优于正弦波折,且子板面倾斜角度越大,抗侧承载力越大;设计正交有限元试验研究波折参数(宽高比L/H、高厚比H/t、波折数量H/Cl、波折角度θ)对内嵌钢板极限和残余承载力的影响,指出宽高比和波折角度对墙板抗侧性能的影响最大.其次,通过比较波折钢板墙与对应平钢板墙的边缘框架内力分布,揭示了内嵌波折钢板的两种抗侧力机制,设计合理的波折钢板能够实现面内剪切屈服的抗侧机制,满足稳定的屈曲后强度的要求;而屈曲后强度下降的墙板,将对边缘柱产生较大的附加弯矩,削弱结构整体性能.对于大宽高比的钢板墙来说,竖直放置的波折钢板面外变形更小,剪切屈服能够充分发展,具有更优越的性能.最后,对工程常用参数范围的波折钢板进行抗侧承载力分析,给出极限承载力的拟合公式,提出保持屈曲后承载力稳定的设计建议.研究发现,减小内嵌墙板的正则化高厚比可以提高其延性.根据提出的设计建议设计的墙板可以实现面内剪切屈服的抗侧承载机制.Compared to ordinary steel shear walls with flat infill plates(FSSWs),the lateral resistance behavior and design of steel corrugated shear walls(SCSWs)require further investigation.Finite element analysis was used to analyze the lateral resistance and load-carrying mechanism of trapezoidal corrugated shear panels in SCSWs.First,by comparing the lateral resistance of trapezoidal and sinusoidal corrugated panels,we conclude that the trapezoidal corrugated panel has better lateral resistance performance than the sinusoidal corrugated panel.Moreover,better performance can be achieved by increasing the inclined angle.The orthogonal numerical test is conducted to investigate the effects of the corrugation parameters(i.e.,L/H,H/t,H/C1,andθ)on the maximum and post-buckling shear resistance of infill panels;the results show that the aspect ratio and inclined angle have the most significant effect on the lateral resistance performance.Second,by comparing the inner force distribution in the boundary frame between SCSWs and FSSWs,we observe two different load-carrying mechanisms of infill corrugated panels.Additionally,a properly designed corrugated shear panel has stable post-buckling lateral resistance and exhibits in-plane shear yielding under lateral load.For corrugated panels with unstable post-buckling strength,the boundary columns endure significant unfavorable bending moments,which compromise the structural performance.In the case of SCSWs with large aspect ratio,the out-of-plane displacement can be reduced using vertical corrugation.Furthermore,the yielding zone can be fully developed,which results in better lateral resistance performance.Finally,fitting equations for the maximum shear resistance and design recommendations for stable post-buckling strength are established by analyzing the lateral resistance of corrugated panels within the practical range in engineering application.The pushover ductility can be improved by reducing the normalized aspect ratio of panels.The in-plane shear yielding mechanism can be ac

关 键 词：波折钢板剪力墙 抗侧机制 抗侧承载力 屈曲后性能 设计建议 

分 类 号：TU391[建筑科学—结构工程]