自复位复合阻尼器对斜拉桥的横向减震性能影响研究  

Influence of rotating friction composite damper on the lateral seismic performance of cable stayed bridge

作　　者：袁西贵 袁波[2] 张凯[3] Yuan Xi-gui;Yuan Bo;Zhang Kai(Urban Construction College,Chengdu Polytechnic,Chengdu 610218,China;Spatial Structure Research Center,Guizhou University,Guiyang 550000,China;Construction Engineering School,Sichuan Vocational and Technical College,Suining 629000,China)

机构地区：[1]成都职业技术学院城建学院,四川成都610218 [2]贵州大学空间结构研究中心,贵州贵阳550000 [3]四川职业技术学院建筑工程学院,四川遂宁629000

出　　处：《工程抗震与加固改造》2023年第4期76-82,75,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：四川省教育厅2017年度科研计划自然科学类重点项目(17ZA0140);校级科研项目(22CZYG019);国家自然科学基金项目(51168010);装配式建造技术科研创新团队(22KYTD02)。

摘　　要：为了提高桥梁结构安全性,本文提出采用摩擦阻尼器与SMA丝构成的复合阻尼器,并研究复合阻尼器对地震作用下的飘浮大跨斜拉桥震动控制效果。建立了SMA的线性化恢复力模型,并通过SAP2000中的MEL元、塑性WEN单元、HOOK单元的组合建立SMA和摩擦阻尼器的恢复力模型,并对其进行了数值分析,同时给出塔梁固接以及安装阻尼器的飘浮大跨斜拉桥在强震作用下的振动控制仿真分析结果。结果表明:本文给出的方法可以较好地模拟SMA双旗形以及摩擦阻尼器双线性等非线性恢复力特征。同时相对于塔梁固接体系来说,复合阻尼器可有效减小墩塔底部的弯矩,同时对主梁中间位移也能起到一定的控制作用。本文提出的复合阻尼器能够有效减小斜拉桥的地震响应,使其不但能够用于新建桥梁,还可以用于既有桥梁的加固改造中,其成果可为实际工程应用提供参考。In order to improve the safety of bridge structures,a composite damper composed of friction dampers and SMA wires is proposed in this paper.The linear restoring force model of SMA is established,and the restoring force model of SMA and friction damper is established through the combination of MEL element,plastic WEN element and Hook element in SAP2000,at the same time,the simulation results of vibration control of a large span of cable-stayed bridge under strong earthquake are given.The results show that the proposed method can simulate the nonlinear restoring force characteristics of SMA double flags and bilinear friction dampers.At the same time,compared with the tower-beam fixed system,the composite damper can reduce the bending moment at the bottom of the pier and control the middle displacement of the main beam.The composite damper proposed in this paper can effectively reduce the seismic response of cable-stayed bridges,which can be used not only in new bridges,but also in the reinforcement and reconstruction of existing bridges.

关 键 词：斜拉桥 横向减震 SMA 摩擦阻尼器 

分 类 号：TU398.1[建筑科学—结构工程]