新型自复位变摩擦阻尼器力学性能研究  

Investigation on Mechanical Behavior of New-type Self-recovering Variable Friction Damper

作　　者：任文杰[1,2] 牛杰[1,2] 何小林[1,2] 

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]河北省土木工程技术研究中心,天津300401

出　　处：《工程抗震与加固改造》2017年第2期136-142,135,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(50978081);住建部科学技术计划项目(2014-K4-037)

摘　　要：研制了一种新型自复位变摩擦阻尼器。该阻尼器由圆柱螺旋压缩弹簧和耗能摩擦单元串联而成,通过铣削钢板实现变摩擦力,并控制圆柱螺旋压缩弹簧的预压力大于摩擦单元的最大输出力,实现自复位功能。本文对该阻尼器进行了拉压循环力学试验,并分别研究了扭矩、位移幅值和加载频率对其滞回曲线和力学参数(单位循环耗能、割线刚度、和等效阻尼比)的影响。利用ABAQUS有限元分析软件建立了实体单元模型,并对其进行了数值模拟。数值模拟结果与试验结果吻合较好,证明了试验结果的正确性。A new type of self-recovery variable friction damper is proposed spring and an energy dissipation friction element, the variable friction is This damper is composed of a cylindrical spiral compression achieved by milling plate, and the self-recovery function of damper is realized by controlling the pre-pressure force of the cylinder spiral spring which is greater than the maximum output force of the friction element. In this paper, the tension compression cyclic mechanics experiments are carried out on this damper. The effects of torque, displacement amplitude and loading frequency on the hysteretic curves and the mechanical parameters （ energy dissipation per cycle,secant stiffness and equivalent damping ratio） are analyazed. The solid element model of the damper is established by using the ABAQUS software, and the numerical simulations are conducted. The results of numerical simulation are in good agreement with the experimental results, which proves the correctness of this model.

关 键 词：自复位变摩擦阻尼器 力学试验 实体单元模型 数值模拟 

分 类 号：TU352.11[建筑科学—结构工程]