黏滞阻尼器参数对连续梁桥地震响应影响分析  

Analysis on Influence of Viscous Damper Parameter on Seismic Response of Continuous Beam Bridge

作　　者：刘朝福 刘维娟 周慧慧 LIU Chaofu;LIU Weijuan;ZHOU Huihui

机构地区：[1]云南省交通规划设计研究院有限公司,云南昆明650224 [2]云南新创新交通建设股份有限公司,云南昆明650000

出　　处：《城市道桥与防洪》2023年第1期79-82,108,I0010,共6页Urban Roads Bridges & Flood Control

摘　　要：为改善连续梁桥在地震作用下的安全性与可靠性,充分发挥减隔震技术在桥梁抗震中的应用,以云南省内某高速公路连续梁桥为背景,运用有限元软件Midas Civil分别建立桥梁有无黏滞阻尼器下的有限元模型,运用非线性动力时程分析法对梁端位移、墩底剪力及墩底弯矩进行计算分析,研究黏滞阻尼器参数在地震响应下对连续梁桥的影响。同时对阻尼系数进行优化,得出最优阻尼系数的黏滞阻尼器。计算结果表明,在阻尼系数一定时,墩底弯矩、剪力随着阻尼系数的变化呈一定规律变化,并选出最优阻尼系数C=4000,阻尼指数α=0.4的黏滞阻尼器。To improve the reliability and safety of the continuous beam bridge under the earthquake action,it is to give full play to the seismic isolation technology in seismic application of bridge.Taking a continuous beam bridge of an expressway in Yunnan as the background,the finite element model of the bridge with the viscous dampers or without viscous dampers is established by the finite element software Midas Civil.The nonlinear dynamic time history analysis method is used to calculate and analyze the beam end displacement,the shear at pier bottom and the bending moment at pier bottom.The influence of viscous damper parameters on the continuous beam bridge under the seismic response is studied.At the same time,the damping coefficients are optimized to achieve the best damping coefficient of viscous damper.The calculation results show that the bending moment and shear at the pier bottom show the change of regularity when the damping coefficient is constant.The best damping coefficient C=4 000 and the damping index =0.4 viscous damper are selected.

关 键 词：地震响应 黏滞阻尼器 连续梁桥 非线性动力时程分析 

分 类 号：U441[建筑科学—桥梁与隧道工程]