带PEC柱钢板剪力墙抗侧刚度的分析

Study of the lateral stiffness of steel plate shear wall with PEC columns

为了解决带部分外包混凝土柱钢板剪力墙的边缘框架与钢板剪力墙之间的刚度匹配问题,本文对边缘框架和钢板剪力墙抗侧刚度进行理论计算,采用叠加的方法给出了带部分外包混凝土柱钢板剪力墙结构在单向荷载作用下各阶段的抗侧刚度。通过Abaqus软件建立8组不同钢板厚度的有限元模型,分析了不同钢板厚度对整个结构抗侧刚度的影响,并设计了一榀1/3缩尺的带部分外包混凝土柱钢板剪力墙试件,对其进行单向加载试验,将试验结果、理论计算和有限元模拟得到的抗侧刚度进行对比。结果表明:通过对结构抗侧刚度理论计算值、有限元模拟值和试验值的对比,3个值的误差均在10%以内,验证了理论推导的公式的正确性;得出内嵌钢板的高厚比在350~560内,带部分外包混凝土柱框架的约束可以充分发挥钢板剪力墙的抗侧性能。

To deal with the stiffness relationship between the edge frame and the steel plate shear wall structure with partially encased concrete columns,the lateral stiffness of the edge frame and steel plate shear wall is calculated theoretically.The lateral stiffness of the steel plate shear wall structure with partially encased concrete columns in each stage is obtained using the superposition principle.Eight finite element models with different thicknesses of steel plate are established by the Abaqus software,and the influence of the thickness of steel plate on the lateral stiffness of the entire structure is analyzed.An experiment on a 1∶3 scale model of the steel plate shear wall structure with partially encased concrete columns is conducted under monotonic load.The results indicate that the errors of the three values are all less than 10%compared with the value of lateral stiffness obtained from the theoretical calculation,finite element simulation,and experiment,which verifies the correctness of the theoretical formula.Therefore,the restraint of the PEC column frame can enhance the lateral performance of the steel plate shear wall when the height-to-thickness ratio of the embedded steel plate is in the range of 350~560.