粘滞性阻尼器在高速铁路长联大跨连续梁中的应用
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摘要
以杭州钱江铁路新桥主桥(45+65+14×80+65+45)m预应力混凝土连续箱梁为工程背景,利用有限元软件Midas/civil建立有限元模型。采用非线性时程分析方法计算设置粘滞性阻尼器前后墩底反力和墩顶位移的变化,从而评价粘滞性阻尼器对提升桥梁抗震性能的作用。结果表明:粘滞性阻尼器的合理设置可以减小制动墩内力,提升高速铁路长联大跨连续梁的抗震性能。
A dynamic finite element model was built using the finite element software Midas/civil with the new Hangzhou Qianjiang Railway Bridge as the practical engineering example,which has a main bridge of(45+65+14×80+65+45) m prestressed concrete continuous girder.A non-linear dynamic time-history analysis method was used to calculate and compare the internal forces of the pier bottom and the displacements of the pier top before and after the setup of viscous dampers with the viscous dampers' impact on the seismic performance then evaluated.The results show that the force of the fixed pier can be significantly reduced via reasonable setup of viscous dampers,which leads to improvement of seismic performance of a long-spanned and long-unit continuous girder bridge on high speed railway.
A dynamic finite element model was built using the finite element software Midas/civil with the new Hangzhou Qianjiang Railway Bridge as the practical engineering example,which has a main bridge of(45+65+14×80+65+45) m prestressed concrete continuous girder.A non-linear dynamic time-history analysis method was used to calculate and compare the internal forces of the pier bottom and the displacements of the pier top before and after the setup of viscous dampers with the viscous dampers' impact on the seismic performance then evaluated.The results show that the force of the fixed pier can be significantly reduced via reasonable setup of viscous dampers,which leads to improvement of seismic performance of a long-spanned and long-unit continuous girder bridge on high speed railway.
引文
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[4]余钱华,夏培华,宋泽冈,等.大跨长联预应力混凝土连续梁桥地震响应[J].重庆交通大学学报,2009,28(01):1-4.YU Qianhua,XIA Peihua,SONG Zegang,et al.Seismicresponse of the large span prestressed concrete continuousgirder bridge[J].Journal of Chongqing JiaotongUniversity,2009,28(01):1-4.(in Chinese)
[5]方志,王飞,张志田,等.粘滞阻尼器参数对大跨度桥梁抗震性能影响研究[J].公路交通科技,2009,26(02):73-78.FNAG Zhi,WANG Fei,Zhang Zhitian,et al.Effects ofviscous damper parameters on anti-seismic performance oflong-span bridge[J].Journal of Highway andTransportation Research and Development,2009,26(02):73-78.(in Chinese)
[6]王志强,葛继平.粘滞阻尼器和LOCK-UP装置在连续梁桥抗震中应用[J].石家庄铁道学院学报,2006,19(01):5-9.WANG Zhiqiang,GE Jiping.Application of viscous damperand lock-up devices in the seismic design of continuous girderbridge[J].Journal of Shijiazhuang Railway Institute,2006,19(01):5-9.(in Chinese)
[7]秦顺全,瞿伟廉.天兴洲公铁两用斜拉桥主梁纵向地震、列车制动及行车移动荷载响应的混合控制[J].桥梁建设,2008,53(04):1-9.QIN Shunquan,QU Weilian.Hybrid control of longitudinalvibration responses in deck of Tianxingzhou rail-cum-roadcable-stayed bridge caused by earthquake,train braking andvehicle moving loads[J].Bridge Construction,2008,53(04):1-9.(in Chinese)
[8]彭文成.杭州钱江铁路新桥总体设计[J].桥梁建设,2011,53(04):53-56.PENG Wencheng.Overall design of new Hangzhou Qiantangriver railway bridge[J].Bridge Construction,2011,53(04):53-56.(in Chinese)
[9]吴波,李惠,陶全兴,等.安装粘滞阻尼器结构的抗震设计方法研究[J].地震工程与工程振动,2000,20(01):87-92.WU Bo,LI Hui,TAO Quanxing,et al.Seismic designmethod of buildings with viscous dampers[J].EarthquakeEngineering and Engineering Vibration,2000,20(01):87-92.(in Chinese)
[10]于建华,谢用九,魏泳涛.高等结构动力学[M].成都:四川大学出版社,2001.YU Jianhua,XIE Yongjiu,WEI Jiantao.AdvancedStructural Dynamics[M].Chengdu:Sichuan UniversityPress,2001.(in Chinese)
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