大跨度连续梁拱组合体系桥梁减震设计
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摘要
分析了大跨度连续梁拱组合体系桥梁的地震易损部位特点,提出了有利于该类桥梁抗震设计的合理塑性铰出现顺序。简要介绍了桥梁地震位移响应的控制机理,以及两类具体的位移控制装置:弹性连接装置和粘滞阻尼器,并对两种位移控制装置进行了参数敏感性分析。最后以一实桥为例,介绍了大跨度连续梁拱组合体系桥梁的减震设计。研究表明,弹性连接装置和粘滞阻尼器均能有效地控制结构的地震位移响应,但如果考虑到经济性和耐久性因素,弹性连接装置稍有优势。
The vulnerable characteristic of long-span continuous beam-arch combination bridges is analyzed,and a reasonable order of plastic hinge is proposed.The control mechanism of seismic displacement response and two displacement control devices,elastic link devices and viscous damper,are briefly introduced.Then parameter sensitivity analysis of the two devices is carried out with response spectrum method.Finally,the seismic design of a bridge is introduced as an example.The results show that both the elastic link devices and the viscous damper with rational parameters may reduce the seismic displacement significantly,but the elastic link device is better if economy and durability factors are considered.
The vulnerable characteristic of long-span continuous beam-arch combination bridges is analyzed,and a reasonable order of plastic hinge is proposed.The control mechanism of seismic displacement response and two displacement control devices,elastic link devices and viscous damper,are briefly introduced.Then parameter sensitivity analysis of the two devices is carried out with response spectrum method.Finally,the seismic design of a bridge is introduced as an example.The results show that both the elastic link devices and the viscous damper with rational parameters may reduce the seismic displacement significantly,but the elastic link device is better if economy and durability factors are considered.
引文
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[2]陈昀明,杨亚林,陈宝春.钢管混凝土拱梁组合桥桥型分析[J].公路,2006(12):38～41Chen Yun-ming,Yang Ya-lin,Chen Bao-chun.Analysisof arch-girder combination bridges with concrete-filledsteel pipe[J].Highway,2006(12):38～41
[3]李国平.连续拱梁组合桥的性能与特点[J].桥梁建设,1999(1):10～13Li Guo-ping.Performance and characteristic of continuouscomposite arch bridge[J].Bridge Construction,1999(1):10～13
[4]交通部中国公路交通史编审委员会.中国公路史(第一册)[M].北京:人民交通出版社,1990Compilation and Review Committee for Chinese Highway&Transportation History of Ministry of Communications.History of Chinese highway(Volume I)[M].Beijing:China Communications Press,1990.
[5]罗世东.铁路桥梁大跨度组合桥式结构的应用研究[J].铁道标准设计,2005(11):1～4Luo Shi-dong.Applied study of long span combinationrailway bridges[J].Railway Standard Design,2005(11):1～4.
[6]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001Fan Li-chu,Zhuo Wei-dong.Seismic Ductility Design ofBridges[M].Beijin:China Communications Press,2001
[7]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,2005,37(12):38～43Ye Ai-jun,Hu Shi-de,Fan Li-chu.Seismic displacementcontrol for super-long-span cable-stayed bridges[J].China Civil Engineering Journal,2005,37(12):38～43
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