分层剪切式铅阻尼器耗能性能研究  

Study on Energy Dissipation Performance of Layered-Shear Lead Damper

作　　者：杜传知 邱廷琦 骆明成 夏玉龙 DU Chuanzhi;QIU Tingqi;LUO Mingcheng;XIA Yulong(Chengdu Xinzhu Road&Bridge Machinery Co.,Ltd.,Chengdu Sichuan 611430,China)

机构地区：[1]成都市新筑路桥机械股份有限公司,成都611430

出　　处：《公路交通技术》2021年第1期42-47,共6页Technology of Highway and Transport

基　　金：十三五国家重点研发计划项目(2017YFC0806000)。

摘　　要：为解决现有铅阻尼器耗能能力较低、滞回循环少的问题,设计了分层剪切式铅阻尼器,并对其进行了剪切试验研究和模拟分析。试验结果表明,该阻尼器有较好的耗能性能,极限位移大,能够较好满足工程需求;结合模拟分析,该阻尼器铅芯会在首层和底层首先发生屈服,然后逐渐变形流动,当上层变形达到外部卡环限值,卡环会将剪力依次传导至下层,形成分层剪切的效果;在小位移时,经典的力学模型能够得到较为准确的仿真结果,而较大位移时,需采用多物理场模型进行模拟,得到更精确的结果。To solve the problems of low energy consumption and less hysteretic cycle of the existing lead damper,a layered-shear lead damper is designed,and its shear test research and simulation analysis are carried out.The test results show that the damper has better energy dissipation performance and large limit displacement,which can better meet the engineering requirements.Combined with the simulation analysis,the lead core of the damper will first occur yield in the top and the bottom,and then deform and flow gradually and comprehensively.When the upper deformation reaches the limit value between the external and inside snap ring,shearing force will be transferred to the lower layer.In small displacement,the classical mechanical model can get more accurate simulation results,while in large displacement,the model needs to use more accurate multi-physical field model for simulation.

关 键 词：减震结构 分层剪切 铅阻尼器 耗能 试验 仿真 

分 类 号：U443.8[建筑科学—桥梁与隧道工程]