剪切钢板阻尼器刚度和耗能的参数研究

Parametric Study on the Stiffness and Energy Dissipation of the Shear Steel Panel Damper

对使用低屈服点钢腹板的剪切钢板阻尼器进行参数分析,研究包括腹板厚度、翼缘厚度、腹板整体尺寸和腹板高宽比等参数对阻尼器刚度和耗能的影响。为了准确模拟剪切钢板阻尼器在低周反复加载试验时的力学性能,采用Abaqus作为模拟平台,基于金属塑性材料和混合强化法则。分析结果表明:腹板厚度对阻尼器刚度的影响较大;翼缘厚度对刚度的影响较小;高宽比不变时,腹板整体尺寸对刚度的影响较小;腹板宽度不变时,腹板高度对刚度的影响较大。通过这些参数调节阻尼器刚度时,应使腹板柔细比处于合理范围内,以确保阻尼器具有良好的滞回性能。

parametric study was conducted onthe shear panel damper with low-yield point steel web. Theeffect of several parameters on stiffness and energy consumption were studied, including the web thickness,the flange thickness, the web overall size and the web aspect ratio. The finite element soflwareAbaqus wasused to simulatethe behaviors of dampers under low cyclic reversed loading. Classical metal plastieityandcombinedhardening were used in the material model. The results show that the web thickness has a greatimpact on the stiffness of the damper; the flange thickness has little impact on the stiffness of the damper; theweb overall size has little impact on the stiffness of the damper as the web aspect ratio is equal to a constant;The web height has a great impact on the stiffness of the damper as the web width is equal to a constant. Theflexible fine ratio should be within reasonable range to ensure the good hysteretic properties of the damper whenthe stiffness of the damper is adjusted by changing these parameters.