碟簧-钢绞线组合自复位防屈曲支撑滞回性能分析  

Analysis of the Hysteretic Performance of Disc Spring-tendonSelf-Centering Buckling-Restrained Brace

作　　者：李文鹏 鲁军凯 LI Wenpeng;LU Junkai(Northeast Forestry University,Harbin,Heilongjiang 150040,China)

机构地区：[1]东北林业大学,黑龙江哈尔滨150040

出　　处：《黑龙江交通科技》2024年第10期75-80,84,共7页Communications Science and Technology Heilongjiang

摘　　要：防屈曲支撑因其良好的耗能能力而被广泛应用于支撑框架结构中,但其震后往往存在较大的残余变形,从而影响结构的可修复性。为减少装有防屈曲支撑结构的残余变形,在防屈曲支撑的基础上并联以组合碟簧和钢绞线为复位元件的自复位系统来为支撑提供恢复力,提出一种较为经济的新型自复位防屈曲支撑。介绍了新型自复位防屈曲支撑的构造及恢复力模型,通过数值模拟研究复位比率及内芯尺寸对滞回性能的影响。结果表明:当复位比率<1时,随着复位比率增大66.67%,支撑的残余变形减小1 505.86%,但其等效粘滞阻尼比降低19.21%;当复位比率相同时,随着内芯尺寸增大90%,支撑的总滞回能量增大538.09%。Buckling-Restrained Braces are widely used in bracedframe structure due to their excellent energy dissipation capabilities.However,they often exhibit unacceptable residual deformations after earthquakes,which can affect the repairability of the structure.To reduce the residual deformation in structures equipped with Buckling-Restrained Braces,this study proposes an economical novel self-centering buckling-restrained brace by paralleling a self-centering system with combination disc springs and tendons as self-centering elements based on Buckling-Restrained Braces to provide the restoring force.The structure and restoring force model of the nocel self-centering buckling-restrained brace are presented.Numerical simulation is then used to investigate the effects of the self-centering ratio and inner core size on the hysteretic performance.The results indicate that when the self-centering ratio is less than 1,an increase in the self-centering ratio by 66.67%leads to a reduction of 1505.86%in the residual deformation of the brace,but its equivalent viscous damping ratio decreases by 19.21%.Additionally,under the same self-centering ratio,an augmentation of the inner core size by 90%results in an enhancement of 538.09%in the total hysteretic energy of the brace.

关 键 词：自复位防屈曲支撑 恢复力模型 数值模拟 残余变形 耗能能力 

分 类 号：TU352.11[建筑科学—结构工程]