基于粘滞阻尼器的大跨斜拉桥抗震分析  

Seismic Analysis of Long-span Cable-stayed Bridges Based on Viscous Damper

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

机构地区：[1]大连职业技术学院,辽宁大连116035

出　　处：《黑龙江交通科技》2024年第11期81-84,90,共5页Communications Science and Technology Heilongjiang

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：为了对大跨斜拉桥的纵向抗震体系进行优化研究,采用非线性动力时程方法,建立了大跨斜拉桥有限元模型,研究了多种结构体系在地震作用下的动态响应,并对阻尼器参数进行敏感性分析和优化设计。研究结果表明:本项目采用半漂浮体系能够满足抗震要求,粘滞阻尼器的设置可以显著减小结构地震作用响应,当阻尼系数取6000 kN·s/m,速度指数为0.4时,可以取得满足设计要求的减震效果。In order to optimize the longitudinal seismic system of long-span cable-stayed bridges,a nonlinear dynamic time history method was used to establish a finite element model of the long-span cable-stayed bridge.The dynamic response of various structural systems under earthquake action was studied,and sensitivity analysis and optimization design of damper parameters were carried out.The research results indicate that the semi floating system used in this project can meet the seismic requirements,and the setting of viscous dampers can significantly reduce the seismic response of structures.When the damping coefficient is set to 6000 kN·s/m and the velocity index is 0.4,the seismic reduction effect that meets the design requirements can be achieved.

关 键 词：斜拉桥 纵向抗震 地震响应 粘滞阻尼器 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]