波形钢板剪力墙内嵌钢板与墙趾可更换阻尼器刚度匹配关系研究

RESEARCH ON STIFFNESS MATCHING RELATIONSHIP BETWEEN EMBEDDED STEEL PLATE AND REPLACEABLE TOE DAMPER IN CORRUGATED STEEL PLATE SHEAR WALL

为了研究内嵌钢板与墙趾可更换阻尼器的刚度匹配关系对波形钢板剪力墙抗震性能的影响,设计了1个带阻尼器的钢板剪力墙试件,针对更换阻尼器前后的试件进行了两次拟静力加载。试验结果表明:阻尼器腹板厚度过大使内嵌钢板先于阻尼器腹板发生变形,导致剪力墙试件耗能能力不能充分发挥;降低阻尼器腹板厚度,可以提高剪力墙的耗能能力,但其承载力下降。证明内嵌钢板与阻尼器的刚度匹配关系对剪力墙的承载能力、耗能能力和延性等抗震性能有关键影响。为了探究两者的合理匹配关系,通过ABAQUS有限元软件建立32个模型进行数值模拟,通过改变阻尼器腹板厚度、内嵌钢板的波纹肋方向和钢板厚度来改变阻尼器与内嵌钢板的匹配刚度,对比数值分析结果和试验结果得出:有限元分析结果和试验结果吻合度较高,波纹肋沿水平方向使试件承载力下降较大;波纹肋沿竖直方向,内嵌钢板厚度和阻尼器腹板厚度分别为5,6 mm时,试件承载力较高、延性较好,抗震性能较好。

In order to study the influence of the stiffness matching relationship between the embedded steel plate and the replaceable toe damper of the steel plate shear wall on its seismic performance,a steel plate shear wall specimen with damper was designed,and the quasi-static load test of the specimen before and after the replacement of the damper was conducted twice.The test results showed that the thickness of the damper web was too large,which caused the embedded steel plate to deform before the damper web,which led to the insufficient energy consumption of the specimen.The thickness of the damper web was reduced,which could improve the energy consumption of the shear wall,but the bearing capacity decreased.It could be proved that the stiffness matching relationship between the embedded steel plate and the damper has a critical impact on the seismic performance of the shear wall,such as bearing capacity,energy consumption and ductility.In order to clarify the reasonable matching relationship,32 models were established by ABAQUS finite element software for numerical simulation.The stiffness of the damper and the embedded steel plate were changed by changing the thickness of the damper web,the direction of the corrugated rib of the embedded steel plate and the thickness of the steel plate,comparing numerical analysis results and test results showed that the finite element analysis results were in good agreement with the test results,the corrugated ribs in the horizontal direction reduced the bearing capacity of the specimens,when the corrugated ribs were in the vertical direction,the thickness of the embedded steel plate and the damper web was 5 mm and 6 mm respectively,the bearing capacity,the ductility and the seismic behavior of the specimen were better.