中空暗缝RC剪力墙板拟静力试验及数值模拟分析  

Quasi-static Test and Numerical Simulation of RC Shear Panel with Concealed Hollow Slits

作　　者：李飞[1] 孙国华[1] 杨文侠[2] Li Fei;Sun Guohua;Yang Wenxia(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,Jiangsu,China;Jiangsu Huning Steel Mechanism Co.,Ltd,Yixing 214231,Jiangsu,China)

机构地区：[1]苏州科技大学,土木工程学院,江苏苏州215011 [2]江苏沪宁钢机股份有限公司,江苏宜兴214231

出　　处：《震灾防御技术》2021年第4期680-690,共11页Technology for Earthquake Disaster Prevention

基　　金：国家自然科学基金(51108292);江苏省高等学校自然科学研究重大项目(17KJA560003);江苏省“六大人才高峰”项目(JZ-035);中国地震局地震工程与工程振动重点实验室重点专项(2020EEEVL0416)。

摘　　要：为明晰中空暗缝RC剪力墙抗剪机理和滞回性能,进行1榀1∶3缩尺单层、单跨中空暗缝RC剪力墙板拟静力试验,得到了试件破坏模式、滞回曲线、骨架曲线、刚度退化、强度退化、延性和耗能能力。通过数值模拟分析了混凝土强度、中空暗缝厚度、缝间墙配筋率对剪力墙板水平抗剪承载力的影响。研究结果表明:试件滞回曲线呈捏缩状,耗能能力一般,但具有较好的剪切变形能力;试件最终呈中空暗缝剪碎、缝间墙两端形成弯曲塑性铰的破坏模式;随着混凝土强度的提高和中空暗缝厚度的减小,试件水平抗剪承载力呈增加趋势;缝间墙配筋率对试件水平抗剪承载力及损伤状态的影响较小。In order to clarify the shear mechanism and hysteretic behavior of RC shear wall with concealed hollow slits,one one-bay,one-story,RC shear wall specimen at one-third scale was tested under cyclic loading.The failure mode,hysteretic curve,skeleton curve,stiffness degradation,ductility and energy dissipation capacity of the specimen were obtained.The effect of concrete strength,concealed hollow slit thickness,and reinforcement ratio of slit wall on its lateral strength was investigated through numerical simulation.Results show that the specimen behaved the pinched hysteretic curve and minor energy dissipation,but moderate shear deformability.The specimen behaved the two-stage failure mode,i.e.,the concrete crushing of concealed hollow slits at the first stage,and the development of flexural plastic hinges at both ends of slit walls during the second stage.With the increase in concrete strength and the decrease in concealed hollow slits thickness,the lateral strength of the specimens increased.The reinforcement ratio produced the slight effect on the lateral strength and damage states.

关 键 词：中空暗缝 RC剪力墙板 承载力 拟静力试验 数值模拟 

分 类 号：TU398.2[建筑科学—结构工程]