网格强化波折钢板剪力墙滞回性能分析  

Hysteretic Behavior of a Grid-Reinforced Corrugated Steel Plate Shear Wall

作　　者：窦超 张晗 杨潇 杨娜[1] Dou Chao;Zhang Han;Yang Xiao;Yang Na(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment,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 [2]结构风工程与城市风环境北京市重点实验室,北京100044

出　　处：《天津大学学报（自然科学与工程技术版）》2022年第12期1275-1288,共14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：为了进一步提升钢板剪力墙结构的抗侧性能和抗震能力,提出了一种新型的波折钢板墙形式,即网格强化波折钢板剪力墙.次框架将单片波折墙板分割成若干块小的内嵌墙板,次框架与内嵌墙板协同工作,并与边缘框架形成一个整体抗侧力体系.基于有限元数值分析,建立内嵌墙板分别为单片平钢板、单片波折钢板、网格强化平钢板和网格强化波折钢板的4组不同形式的模型算例,对其在往复加载下的滞回性能进行分析.对比研究了各算例的应力发展、墙板面外变形、滞回曲线和等效阻尼比等结果,并选取关键截面提取边缘框架柱的轴力、剪力和附加弯矩等内力结果进行分析比较.随后,探讨了分块墙板数量、网格数量、各部件钢材强度的变化和肋板刚度比对结构滞回性能、应力发展情况和结构承载力的影响.研究发现,次框架的设置可使钢板剪力墙的滞回曲线更加饱满,改善了单片平墙板滞回曲线的“捏缩”现象和单片波折墙板承载力的退化现象,显著提升了墙板的抗侧性能及耗能能力.大震层间位移角下网格强化波折钢板剪力墙仅发生微弱的面外变形,大幅度改善了传统单片墙板面外变形大、舒适性低的缺点.由于次框架及分块墙板的作用,网格强化钢板墙边缘框架柱的剪力分布更为均匀,由“拉力带”作用产生的边缘框架柱附加弯矩也明显下降.此外,变化关键参数分析表明,减少分块墙板数量可改善波折钢板剪力墙的抗侧承载力退化现象,而次框架网格数减少则会加剧承载力退化问题;边缘框架和次框架采用更高强度钢材使墙板的承载能力和抗震性能得到明显的提高;肋板刚度比的增大能有效提高墙板的抗侧承载效率,设计中应满足最小刚度比要求.总体来看,网格强化波折钢板剪力墙形成了多道抗震防线,合理设计能实现内嵌钢板→次框架→边缘框架的屈服顺To further improve the lateral performance and seismic capacity of steel plate shear walls(SPSWs),a new type of grid-reinforced corrugated steel plate shear walls(CSPSWs)is proposed in this paper.The entire corrugated wall panel is divided into several small wall panels embedded within the subframe,while subframes work together with the embedded wall panel,forming an overall lateral resistance system with the boundary frame.Based on the finite element numerical analysis,four shear wall models,namely,conventional flat SPSW,conventional CSPSW,grid-reinforced flat SPSW,and grid-reinforced CSPSW,are established to analyze the hysteretic per formance under cyclic loading.Then,their stress development,out-of-plane deformation,hysteretic curves,and equivalent damping ratios are compared.Meanwhile,the internal forces of the boundary frame columns,namely,axial force,shear force,and bending moment,of the four models are compared.Lastly,the effects of key parame-ters,such as the number of embedded wall panels and grids and the material strength of different parts and rib stiff-ness ratio,on the hysteretic performance,stress development,and bearing capacity of the structure are discussed.The results show that the subframe improves the hysteretic performance,including the lateral strength,ductility,and energy dissipation of SPSWs,by reducing the pinch of the hysteretic curve of the conventional flat SPSW and the degradation of the lateral resistance of the conventional CSPSW.In addition,under the maximum story drift ratio,an insignificant out-of-plane deformation occurs in the grid-reinforced CSPSW,which improves the comfortability for common use.Moreover,due to the action of subframes and embedded wall panels,the shear distribution of the boundary frame columns of grid-reinforced SPSWs and CSPSWs is uniform,and the additional bending moment caused by the“tension field”is also significantly reduced.Decreasing the number of embedded wall panels and increasing the number of subframe grids can reduce the degradation of the l

关 键 词：网格强化 波折钢板剪力墙 抗侧性能 滞回性能 框架内力 

分 类 号：TU391[建筑科学—结构工程]