弦支穹顶结构阻尼器替换撑杆振动控制研究  

Performance and method of vibration control of a suspendome using dampers to replace struts

作　　者：马金凤 刘铭劼 MA Jinfeng;LIU Mingjie(School of Civil Engineering,Tianjin University,Tianjin 300350,China;Key Laboratory of Coast Structure Safety,Tianjin University,Tianjin 300350,China;Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学建筑工程学院,天津300350 [2]天津大学滨海土木工程结构与安全教育部重点实验室,天津300350 [3]天津大学中国地震局地震工程综合模拟与城乡抗震韧性重点实验室,天津300350

出　　处：《振动与冲击》2024年第18期173-185,共13页Journal of Vibration and Shock

基　　金：国家自然科学基金(U1939208);天津市科技计划项目(23ZYYYJC00010)。

摘　　要：针对弦支穹顶结构在地震作用下的动力响应问题,提出采用黏弹性阻尼器替换弦支穹顶结构撑杆的振动控制方法,基于结构力学原理推导了弦支穹顶结构上弦节点静力位移公式,提出了黏弹性阻尼器参数刚度系数K、阻尼系数C的理论公式,借助有限元软件针对结构跨度、结构矢跨比、阻尼器参数、替换杆件类型、替换撑杆位置进行参数化分析。结果表明,替换阻尼器参数选用理论计算值的减振效果优于对照组,验证了阻尼器参数理论公式适用于弦支穹顶结构振动控制,最优替换杆件类型为结构的竖向撑杆,最优减振率可达72.46%。In view of the high dynamic response of a suspendome under earthquake,a vibration control method using viscoelastic dampers to replace the struts of the suspendome was proposed.Based on the principle of structural mechanics,the static displacement at the top chord node of the suspendome was derived.The theoretical formulas for the stiffness coefficient K and damping coefficient C of the viscoelastic dampers were proposed.A parameterized analysis was conducted using finite element software on the factors of structural span,structural rise span ratio,damper parameters,replacement rod types,and replacement strut positions.The results show that the vibration reduction effect of the damper parameters with the theoretical calculated values is better than that of the control group.The results verify the applicability of the damper parameter theoretical formula to vibration control of the suspendome.The optimal member type to be replaced for the suspendome is vertical strut,with an optimal vibration reduction rate of 72.46%.

关 键 词：弦支穹顶 振动控制 黏弹性阻尼器 阻尼器参数 理论分析 

分 类 号：TU393.3[建筑科学—结构工程]