地震行波输入下大跨度斜拉桥耗能减震措施

英文篇名：Energy-dissipated Seismic Mitigation for Long-span Cable-stayed Bridge under Traveling Wave Input
中文刊名：中国市政工程
英文刊名：China Municipal Engineering
作者：隆德重 ; 宋国富 ; 刘萍
英文作者：LONG De-zhong1 ; SONG Guo-fu2 ; LIU Ping3 (1. Nanning Reconnaissance and Design Institute ; Guangxi Pearl River Committee ; Nanning 530007 ; China ; 2. Shandong Keda Engineering Design and Consultation Co. Ltd. ; Ji'nan 250101 ; China ; 3. Guangxi Hydraulic and Electric Polytechnic ; Nanning 530023 ; China)
中文关键词：斜拉桥 ; 粘滞阻尼器 ; 减震效果 ; 行波效应
英文关键词：cable-stayed bridge ; viscous damper ; vibration-suppressed effect ; traveling wave effect
出版日期：2008-08-25
机构：广西珠委南宁勘测设计院;山东科达工程设计咨询有限公司;广西水利电力职业技术学院;
年：2008
期：04
出版单位：中国市政工程

摘要

地震作用下漂浮体系斜拉桥的纵向位移较大,需采取抗震减震措施。以一座大跨度斜拉桥为实例,建立三维有限元模型,计算分析了地震行波输入下粘滞阻尼器对飘浮体系斜拉桥的减震效果。结果表明,地震行波效应会减小斜拉桥桥塔的地震反应而增大主梁的地震反应,粘滞阻尼器被动控制对斜拉桥位移的减震效果非常显著,且行波效应对其减震效果无明显不利影响。
Great longitudinal displacement will occur to the floating cable-stayed bridge under seismic impact and measures must be taken to mitigate it. For a long-span cable-stayed bridge, the vibration-suppressed effect of viscous dampers is calculated and analyzed with its three dimensional finite element model under seismic traveling wave input. The results indicate that seismic traveling wave effect can lower the seismic response of the pylon and increase the seismic response of the girder. The vibration-suppressed effect of passive control with viscous dampers is obvious on the displacement of the cable-stayed bridge. Traveling wave effect makes little unfavorable impact on the vibration-suppressed effect.

引文

[1]范立础.桥梁抗震[M].上海:同济大学出版社,1997.
    [2]叶爱君,范立础.附加阻尼器对超大跨度斜拉桥的减震效果[J].同济大学学报(自然科学版),2006,34(7):859-863.
    [3]亓兴军,李小军.大跨飘浮体系斜拉桥减震控制研究[J].振动与冲击,2007,26(3):79-82.
    [4]胡聿贤.地震工程学[M].北京:地震出版社,1988.