单面外包混凝土组合钢板剪力墙的混凝土板厚需求  

Concrete Panel Thickness Requirement for Composite Steel Plate Shear Wall with One-Sided Concrete Encasement

作　　者：朱万俊 顾强[1] ZHU Wanjun;GU Qiang(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China)

机构地区：[1]苏州科技大学土木工程学院

出　　处：《建筑钢结构进展》2019年第6期32-40,共9页Progress in Steel Building Structures

基　　金：国家自然科学基金(51678382)

摘　　要：外包混凝土组合钢板剪力墙抗剪承载力高、抗侧刚度大、耗能能力强,是一种有效的高层结构抗侧力构件。该构件利用钢筋混凝土板对钢板提供的侧向约束,使得钢墙板屈曲晚于剪切屈服。延性设计要求钢板进入剪切屈服后要有一定的变形耗能能力,混凝土板需达到一定的厚度才能保证钢板发生弹塑性屈曲。因此混凝土板厚需求是组合钢板剪力墙设计中的一个关键问题,但前人对于这方面的研究并不是很多。考虑栓钉间距、混凝土板厚度、钢板厚度、混凝土强度等级、墙板高宽比的变化对单面外包混凝土组合钢板剪力墙进行了弹塑性分析。基于有限元计算结果,提出了单面外包混凝土组合钢板剪力墙在层间侧移角小于0.4%时钢板不发生屈曲的混凝土板厚需求计算公式。Composite steel plate shear wall(C-SPW)is an effective lateral load resisting component used in high-rise buildings due to its large shear bearing capacity,lateral stiffness and energy dissipation capacity.Reinforced concrete panel provides effective lateral restraint to prevent the premature buckling of steel plate.In the ductility design of C-SPW,steel plate should have certain plastic deformation and energy dissipation capacity after it yields in shear.The thickness of concrete panel should reach a certain value to make the elasto-plastic buckling of steel plate happen.Few researchers pay attention to the study of concrete panel thickness requirement,which is important for the design of C-SPW.In this paper,the inelastic analysis of C-SPW with one-sided concrete encasement is conducted concerning the effects of headed stud spacing,concrete panel thickness,steel plate thickness,concrete strength and panel aspect ratio.Based on finite element analysis,a formula for concrete panel thickness requirement in the design of C-SPW with one-sided concrete encasement is proposed to make sure the C-SPW will not buckle until its drift reaches 0.4%.

关 键 词：组合钢板剪力墙 混凝土板厚度 延性设计 弹塑性屈曲 有限元分析 

分 类 号：TU398[建筑科学—结构工程]