短肢剪力墙新型多垂直杆单元模型研究  

Study on a New Type of Multi-vertical Truss Element Modelof Short-limb Shear Wall

作　　者：张品乐[1] 王金玉琳 张智吉 贾毅 陶忠[1] ZHANG Pinle;WANG Jinyulin;ZHANG Zhiji;JIA Yi;TAO Zhong(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500

出　　处：《北京工业大学学报》2022年第11期1159-1167,共9页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(52168069,51568028,52068037)。

摘　　要：通过结合多垂直杆的轴向刚度和剪切刚度来考虑多垂直杆中正应力对剪切刚度的影响,引入剪力滞后翘曲位移函数和材料动态损伤累积指标,建立能够考虑剪力滞后和材料连续损伤累积效应影响的短肢剪力墙非线性分析单元模型.同时进行6组L形截面高强箍筋约束钢筋混凝土(reinforced concrete,RC)短肢剪力墙拟静力试验研究,并对其滞回性能进行非线性数值模拟分析.结果表明:无翼缘腹板端部密配较细直径的高强箍筋能够有效抑制纵筋屈曲和翼缘腹板端部混凝土受压产生的横向变形,从而显著提高短肢剪力墙的耗能能力和延性.最后采用建立的非线性分析单元模型对所有试件进行非线性数值模拟分析,并与试验荷载-位移曲线结果进行比对,从而验证了非线性单元模型具有较高的模拟精度.The multi-vertical truss element model considering the influence of normal stress to shear stiffness,was achieved by the combination of axial stiffness with shear stiffness.The new multi-vertical truss shear wall member mode was established,which considered shear-lag and cumulative damage effect.Six quasi-static tests of reinforced concrete(RC)short-limb shear wall restrained by high-strength stirrups were carried out,and the mechanical response and hysteretic behavior was discussed and simulated.The buckling of longitudinal reinforcements was effectively inhibited when the RC short-limb shear wall was strengthened by the high-strength stirrups with small diameter.Meanwhile,the transverse deformation of concrete located in the web boundary side was avoided.The horizontal distribution reinforcements improved the shear capacity of RC short-limb shear wall.The energy dissipation capacity and ductility of RC short-limb shear wall was significantly enhanced by the high-strength stirrups.Finally,the HSL500-1 and HSL800-2 members were analyzed by adopting the nonlinear analysis element model of RC short-limb shear wall,and the high simulation accuracy of the proposed model was confirmed by comparing between the test date and the simulations.

关 键 词：L形截面短肢剪力墙 剪力滞后 损伤累积指标 多垂直杆单元模型 拟静力试验 非线性分析 

分 类 号：TU375[建筑科学—结构工程]