大跨度公铁两用斜拉桥阻尼器参数研究
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摘要
以我国正在建设的某大跨度公铁两用斜拉桥为背景,分析研究了在地震荷载和列车制动力作用下,塔梁之间采用阻尼装置的结构动力响应.计算结果表明,塔梁之间采用液压阻尼装置,能较好地解决温度、列车制动力和地震荷载作用下大跨度公铁两用斜拉桥的受力问题,而选取合理的阻尼参数可以有效控制梁体的纵向位移.
Based on a rail-cum-road cable-stayed bridge under construction in China,an analysis is made of the dynamic response of the bridge with hydraulic pressure damping device between tower and beam subjected to seismic load and train braking force.The results show that mechanical problem of rail-cum-road cable-stayed bridge is settled by damping device between tower and beam subjected to temperature load,seismic load and train braking force.And the longitudinal displacement of beam is effectively controlled by proper damping parameters.
Based on a rail-cum-road cable-stayed bridge under construction in China,an analysis is made of the dynamic response of the bridge with hydraulic pressure damping device between tower and beam subjected to seismic load and train braking force.The results show that mechanical problem of rail-cum-road cable-stayed bridge is settled by damping device between tower and beam subjected to temperature load,seismic load and train braking force.And the longitudinal displacement of beam is effectively controlled by proper damping parameters.
引文
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[2]叶爱君,胡世德,范立础.斜拉桥抗震结构体系研究[J].桥梁建设,2002(4):1.YE Aijun,HUShide,FAN Lichu.Research on aseismatic struc-tural systemof cable-stayed bridge[J].Bridge Construction,2002(4):1.
[3]叶爱君,胡世德,范立础.超大跨度斜拉桥的地震位移控制[J].土木工程学报,2004,37(12):38.YE Aijun,HU Shide,FAN Lichu.Seismic displacement controlfor super-long-span cable-stayed bridges[J].China Civil Engi-neering Journal,2004,37(12):38.
[4]Main J A,Jones N P J.Evaluation of viscous dampers for stay-cable vibration mitigation[J].Journal of Bridge Engineering,2001,6(6):385.
[5]李乔.芜湖长江大桥关键技术研究———斜拉桥动力特性及反应谱分析[R].成都:西南交通大学土木工程学院,1997.LI Qiao.Study on key technique of Wuhu Yangtze River—dynamic characteristic and response spectrumanalysis[R].Cheng-du:School of Civil Engineering,Southwest Jiaotong University,1997.
[6]Clough R,Penzien J.Dynamics of structures[M].New York:McGraw-Hill Inc,1993.
[7]Taylor D P.Damper retrofit of the London millenniumfootbridge—a case study in biodynamic design[R].New York:UB-MCEER-EERI Seminar,2003.
[8]Wilson E L.Three di mensional static and dynamic analysis ofstructures:A physical approach with emphasis on earthquakeengineering[M].California:Computers and Structures Inc,2002.
[9]王锐锋,李宏年.铁路桥梁列车制动力荷载研究[J].北方交通大学学报,2003,27(1):63.WANG Ruifeng,LI Hongnian.Study of train braking force onrailroad bridge[J].Journal Of Northern Jiaotong University,2003,27(1):63.
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