局部削弱弧形钢板阻尼器减震性能研究

Damping Performance Study of Local Dent Arc Plate Damper

本文提出一种用于木结构榫卯节点的局部削弱弧形钢板阻尼器。设计15个局部削弱弧形钢板阻尼器,采用ABAQUS软件对其进行有限元分析,研究钢板弧形半径、钢板厚度、钢板宽度和削弱系数对阻尼器性能的影响规律。将一个优选出的阻尼器安装在某典型木结构中,研究其对木结构的减震效果。研究结果表明:局部削弱弧形钢板阻尼器耗能位置明确,耗能效果明显,滞回曲线饱满,塑性变形良好;随着阻尼器钢板厚度、钢板宽度和削弱系数的增大,阻尼器耗能量增大;随着阻尼器钢板弧形半径增大,阻尼器耗能量减小;安装阻尼器后,木结构的层间位移角和楼层剪力均有所减少,阻尼器在木结构中起到一定减震效果。给出局部削弱弧形钢板阻尼器各项参数的取值范围。

A local dent arc plate damper（ LDAPD） which is suitable for mortise-tenon joints in wood structure is presented. Design scheme and working principle of such damper are introduced. 15 LDAPD with slightly different parameters are analyzed with finite element software ABAQUS,in order to know the influence of parameters of LDAPD such as theradius of arc,thickness,width and weakening coefficient of the steel plate. The results show the defined place of energy dissipation of LDAPD,obvious energy absorption,full hysteretic curves,good performance of plastic deformation. The damper energy increases with the thickness,width and weakening coefficient of the steel plate of LDAPD,and decreases with the radius of arc of LDAPD. The interstory displacement and story shear of wood structure both decrease slightly after applying dampers,so damper can display its shock-absorbing effect. The appropriate parameters ranges are suggested.