摘要
该文提出了一种新型增效转动摩擦阻尼器(ERFD),由杠杆原理放大其转动角度,进而提高其耗能能力,适用于梁柱节点。为验证ERFD工作机理的可行性,采用ABAQUS软件建立其有限元数值模型,以相同摩擦工况的扇形摩擦阻尼器(SFD)和未放大的转动摩擦阻尼器(RFD)作为对照模型进行力学性能分析,进而探究ERFD耗能增效机制。研究结果表明:ERFD的承载力、刚度和耗能均得到明显提高,较于SFD分别增大了17.63%、12.54%、14.53%;其他三个改变摩擦片布置方式的试件的刚度和耗能比ERFD分别减少29.38%、58.67%、70.76%和29.55%、58.96%、70.58%;ERFD的承载能力和耗能能力相较于RFD放大了92.38%、85.49%。这说明ERFD耗能能力良好,且三个点均布置摩擦面的整体力学性能较好,且增效效果显著。
In this study,a novel enhanced rotational friction damper(ERFD)is proposed,which is applied to beam-column joints by increasing its rotation angle and thereby increases its energy dissipation capacity.To verify the feasibility of the working mechanism,the finite element model is established in ABAQUS software,and the sectorial friction damper(SFD)and the common rotational friction damper(RFD)with same friction condition are used as comparison models,so as to explore the energy dissipation mechanism of ERFD.The results show that the bearing capacity,stiffness and energy consumption of ERFD are significantly improved,increased by 17.63%,12.54%and 14.53%compared with SFD,respectively.The stiffness and energy consumption of other three specimens with different friction surface arrangement are reduced by 29.38%,58.67%,70.76%,and 29.55%,58.96%,70.58%,respectively.The bearing capacity and energy consumption capacity are enlarged by 92.38%and 85.49%compared with RFD.It shows that ERFD has good energy dissipation capacity,and the overall mechanical properties of the friction surfaces arranged at all three points are the best,and the enhancement effect is remarkable.
作者
林子健
张超
于天昊
刘婧宜
巫卓楷
LIN Zi-jian;ZHANG Chao;YU Tian-hao;LIU Jing-yi;WU Zhuo-kai(College of Civil Engineering,Guangzhou University,Guangzhou 510006,China)
出处
《工程力学》
EI
CSCD
北大核心
2024年第S01期171-178,共8页
Engineering Mechanics
基金
国家重点研发计划项目(2022YFC3803000)。
关键词
增效机制
转动摩擦阻尼器
梁柱节点
力学性能
工作机理
enhanced mechanism
rotational friction damper
beam-column joint
mechanical properties
working mechanism
