摘要
在圆环摩擦弹簧(ring friction spring,RFS)的基础上,提出了一种新型三层圆环摩擦弹簧(three-layer ring friction spring,TRFS)。首先,介绍其基本构造形式,分析其工作机理,推导其滞回行为的理论公式。其次,采用ABAQUS软件建立多组弹簧精细化有限元分析模型,并与理论计算结果进行对比,验证模型的准确性。进而分析不同参数对弹簧的滞回行为和截面应力分布状态的影响。结果表明,TRFS的滞回行为表现为“三角形”滞回模型,其加卸载阶段刚度和耗能能力受内外环倾角和摩擦系数的影响较大,而截面应力分布状态则主要受到内外环倾角的影响,且与相同规格的RFS相比,在产生相同轴向往复位移前提下,TRFS具备更大的承载能力、自复位能力及绝对耗能,内部空间的利用率更高。最后,还提出了一种内置三层圆环摩擦弹簧的自复位阻尼器,可将其应用于建筑结构抗震领域。
A novel three-layer ring friction spring(TRFS)was proposed based on the ring friction spring(RFS).Firstly,the geometry and working principle as well as theoretical formula of TRFS were subsequently described.Secondly,the elaborated finite element(FE)model of a class of TRFS was established via ABAQUS software,and the accuracy of the model was verified by comparing with the analytical method,in order to further illustrate the stress distribution and design parameter effect of the rings.The results show that the hysteresis behavior of TRFS is a triangle hysteresis model,and its stiffness and energy dissipation capacity are greatly affected by the inclination angle of the inner and outer rings and the friction coefficient of the contact surface,while the stress distribution of the section is mainly affected by the inclination angle of the inner and outer rings.Compared to the same specifications RFS,the advantages of TRFS are higher bearing capacity,self-centering capacity and greater absolute energy dissipation as well as higher utilization of internal space under the same axial reciprocating displacement.Finally,a self-centering damper with TRFS was proposed,which can be used in seismic resistance of building structures.
作者
陈浩宇
赵桂峰
马玉宏
孔思华
CHEN Hao-yu;ZHAO Gui-feng;MA Yu-hong;KONG Si-hua(Earthquake Engineering Research&Test Center,Guangzhou University,Guangzhou 510006,China;Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology,Key Laboratory of Earthquake Resistance,Earthquake Mitigation and Structural Safety,Ministry of Education,Guangzhou 510006,China;School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)
出处
《科学技术与工程》
北大核心
2023年第2期707-715,共9页
Science Technology and Engineering
基金
国家重点研发计划(2019YFE0112500)
国家自然科学基金(52078150,51878196)
广州大学基础创新项目(2021GDJCM44)。
关键词
三层圆环摩擦弹簧
数值模拟
滞回行为
截面应力状态
three-layer ring friction spring
numerical simulation
hysteresis behavior
section stress