考虑周围子结构对中间柱型黏滞阻尼器减震效率影响研究  

Effects of ambient substructure on the damping efficiency of intermediate-post type viscous damper

作　　者：李祖玮 潘文[2] 兰香 Li Zu-wei;Pan Wen;Lan Xiang(Jiangsu Goodbang Vibration Control Technology Co.Ltd,Wuxi 214400,China;Kunming University of Science and Technology,Kunming 650500,China;College of Architecture and Civil Engineering,Kunming University,Kunming 650214,China)

机构地区：[1]江苏工邦振控科技有限公司,江苏无锡214400 [2]昆明理工大学建筑工程学院,云南昆明650500 [3]昆明学院建筑工程学院,云南昆明650214

出　　处：《工程抗震与加固改造》2023年第1期54-61,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(51168024)。

摘　　要：为研究周围子结构对中间柱型黏滞阻尼器效率的影响规律,将阻尼器位移分解为5个组成部分,即结构层剪切变形、柱轴向变形、梁柱节点转动、悬臂墙自身变形及阻尼力反作用下局部梁段变形引起的位移。根据阻尼器的位移分解,从理论上分析了柱跨内位置λ和周围子结构梁柱线刚度比ρ对黏滞阻尼器减震效率的影响,并以附加阻尼比ζ作为减震效率的评价指标,通过大量数值模拟探究出λ、ρ及阻尼系数c对ζ的影响规律,提出中间柱型黏滞阻尼减震结构效率优化步骤。结果表明:柱宜尽量靠近跨中,跨中时效率是跨边的2倍左右;周围子结构梁柱线刚度比和阻尼系数在适度范围内增加,亦可使阻尼器耗能效率提高。In order to study the effects of ambient substructure on the damping efficiency of intermediate-post type viscous damper,the damper is divided into five parts including deformation-induced displacement caused by inter-story shear deformation,column axial deformation,column-beam joint rotation,cantilever wall deformation,and damping reacting force.As per the displacement division of the damper,effects of the positionλwithin the span of column and the stiffness ratioρof the beam column line of the ambient substructure on the damping efficiency are theoretically analyzed,and the additional damping ratioζis used as the evaluation index for the damping efficiency.The effects ofλ,ρ,and the damping coefficient c onζare expounded through the numerical simulation,and processes were proposed to optimize the damping efficiency of the intermediate-post type viscous damper.The results show that the column should be as close as possible to the midspan,and the damping efficiency at the midspan is two times than that at the side of the span.The stiffness ratio of beam column line of the ambient substructure and the damping coefficient both increase in a certain range,which can improve the efficiency in energy dissipation of the damper.

关 键 词：子结构 柱跨内位置 子结构梁柱线刚度比 阻尼系数 附加阻尼比 

分 类 号：TU317.1[建筑科学—结构工程]