黏滞阻尼器在大跨斜拉桥减震设计中的应用  

Application of viscous dampers to seismic mitigation design of long-span cable-stayed bridges

作　　者：尚晋 SHANG Jin(Dalian Vocational and Technical College,Dalian 116035,Liaoning,China)

机构地区：[1]大连职业技术学院,辽宁大连116035

出　　处：《工程建设》2025年第4期50-55,共6页Engineering Construction

基　　金：大连职业技术学院(大连开放大学)校级科研课题(ZK2024YB07)。

摘　　要：为揭示黏滞阻尼器对大跨斜拉桥减震效果的影响规律,需对黏滞阻尼器进行参数分析及优化设计。文章以某斜拉桥项目为工程背景,建立空间动力模型,基于非线性动力时程分析方法,对设置了阻尼器后的大跨斜拉桥结构动力响应进行计算和分析。结果表明:通过选择合适的阻尼器参数和布置位置,可有效降低结构主梁和塔顶纵向位移,同时改善墩底受力,解决大跨度斜拉桥的抗震问题;综合考虑阻尼器制作和安装等因素,该桥阻尼系数取6000 kN·s/m,速度指数取0.4时可以取得较好的减震效果;综合不同位置的阻尼器布置方案下结构地震响应分析结果,提出了该桥阻尼器布置的最优方案。In order to reveal the influence law of viscous dampers on the seismic reduction effect of long-span cable-stayed bridges,parameter analysis and optimization design of viscous dampers are carried out.Taking a certain cable-stayed bridge project as the engineering background,a spatial dynamic model is established.Based on the nonlinear dynamic time history analysis method,the dynamic response of the long-span cable-stayed bridge with dampers is calculated and analyzed.The results show that by selecting appropriate damper parameters and placement positions,the longitudinal displacement of the main beam and tower top of the structure can be effectively reduced,while improving the stress on the pier bottom and solving the seismic problem of long-span cable-stayed bridges;Taking into account factors such as the production and installation of dampers,a damping coefficient of 6000 kN·s/m and a velocity index of 0.4 can achieve good seismic reduction effect for the bridge;Based on the seismic response analysis results of the structure under different damper layout schemes,the optimal damper layout scheme for the bridge is proposed.

关 键 词：斜拉桥 减震设计 参数分析 黏滞阻尼器 地震响应 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U442.5[交通运输工程—道路与铁道工程]