规则连续梁桥质量转动缠绕索装置减震效果及影响参数研究  

Isolation effect and influence parameters of mass rotating wrap rope device for regular continuous girder bridge

作　　者：刘延芳 张文学[1] 杜修力[1] 鲍卫刚 LIU Yan-fang;ZHANG Wen-xue;DU Xiu-li;BAO Wei-gang(College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China;China Communications Construction Company Limited,Beijing 100088,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]中国交通建设股份有限公司,北京100088

出　　处：《振动工程学报》2024年第11期1818-1825,共8页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(51778022)。

摘　　要：为解决连续梁桥纵向地震惯性力仅由固定墩承受的抗震设计难题,充分发挥与固定墩相同截面的活动墩的抗震潜能,基于缠绕索原理,研发了利用附加质量惯性力的质量转动缠绕索装置,从而实现固定墩与活动墩协同受力和限制梁端相对位移的目的。在阐述装置工作原理及构造特点的基础上,提出了装置的恢复力模型,并通过对一座三跨规则连续梁桥建立全桥有限元模型,研究了连续梁桥质量转动缠绕索装置的减震效果,系统分析了附加质量、摩擦系数和初始松弛系数取值对装置减震性能的影响。结果表明,质量转动缠绕索装置对于减小固定墩地震响应,提升活动墩参与连续梁桥纵向整体协同受力的效果较为明显,值得注意的是,不同地震波作用下减震装置参数对结构地震响应的影响略有不同。In order to solve the problem of seismic design of continuous beam bridge in which the longitudinal seismic inertia force is only carried by the fixed pier,the seismic potential of the movable pier is fully exerted with the same section as the fixed pier.Based on the principle of wrap rope,the mass rotation wrap rope device excited by additional mass inertia force is developed to realize the cooperative force of fixed pier and movable pier and limit the relative displacement of beam end.Based on the working principle and structural characteristics of the device,the restoring force model of the device is proposed,and through a 3-span regular continuous beam bridge,the finite element model of the whole bridge is established.The effects of additional mass,friction coefficient and initial relaxation coefficient on the vibration reduction performance of continuous beam bridge are systematically analyzed.The results show that the effect of mass rotation wrap rope device on reducing the seismic response of fixed pier and lifting the movable pier to participate in the longitudinal whole cooperative force of continuous beam bridge is obvious.The influence of parameters of different seismic wave input characteristics is slightly different,but reasonable design parameters of the device will produce a more obvious effect of shock absorption.

关 键 词：连续梁桥 质量转动缠绕索装置 减震效果 附加质量 摩擦系数 初始松弛系数 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U442.55[交通运输工程—道路与铁道工程]