斜拉桥过渡墩处合理横桥向约束体系研究
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摘要
研究目的:横桥向地震作用下,斜拉桥的过渡墩是抗震设计的薄弱环节,有必要研究斜拉桥过渡墩处合理的横桥向约束体系。以厦漳跨海大桥南汊主桥为工程背景,从提高过渡墩横桥向抗震性能的角度出发,研究3种横桥向约束体系(墩梁主从、墩梁自由、墩顶设置限位挡块)对斜拉桥横桥向抗震性能的影响。研究结论:采用墩梁主从体系会放大过渡墩及其基础的地震响应;采用墩梁自由体系虽然可以减小过渡墩及其基础的地震响应,但会造成墩梁横桥向相对位移过大;采用限位挡块体系可以有效减小过渡墩的地震响应,合理的挡块初始间隙可以通过参数分析得到。
Research purposes:Under the effect of transverse earthquake,the transitional pier of cable-stayed bridge is one of the weakest links in seismic design,so it is necessary to study the reasonable transverse constraint system for the transitional pier.Taking the Nancha main bridge of Xiamen-Zhangzhou Sea-crossing Bridge as an example,the studies are done on the effect of three transverse constraint systems ( fixed system,free system,and block system) on transverse seismic performance of cable-stayed bridge in view of promoting the transverse seismic performance of cable-stayed bridge.Research conclusions:The seismic responses of transitional pier and its foundation are amplified when the fixed system is used.Although the seismic responses of transitional pier and its foundation can be reduced when the free system is used,but the relative transverse displacement between transitional pier and girder is over big.The seismic responses of transitional pier and its foundation can be effectively decreased when the block system is used,and reasonable initial gap of the block can be obtained through analyses of parameters.
Research purposes:Under the effect of transverse earthquake,the transitional pier of cable-stayed bridge is one of the weakest links in seismic design,so it is necessary to study the reasonable transverse constraint system for the transitional pier.Taking the Nancha main bridge of Xiamen-Zhangzhou Sea-crossing Bridge as an example,the studies are done on the effect of three transverse constraint systems ( fixed system,free system,and block system) on transverse seismic performance of cable-stayed bridge in view of promoting the transverse seismic performance of cable-stayed bridge.Research conclusions:The seismic responses of transitional pier and its foundation are amplified when the fixed system is used.Although the seismic responses of transitional pier and its foundation can be reduced when the free system is used,but the relative transverse displacement between transitional pier and girder is over big.The seismic responses of transitional pier and its foundation can be effectively decreased when the block system is used,and reasonable initial gap of the block can be obtained through analyses of parameters.
引文
[1]董胜利,亓兴军.大跨斜拉桥减震控制分析[J].铁道工程学报,2007(7):47-51.Dong Shengli,Qi Xingjun.Seismic Response Control Analysis of Long-span Cable-stayed Bridge[J].Journal of Railway Engineering Society,2007(7):47-51.
[2]徐秀丽,刘伟庆,李龙安,等.斜拉桥结构减震设计优化研究[J].地震工程与工程振动,2006(2):119-124.Xu Xiuli,Liu Weiqing,Li Longan,etc.Optimized Earthquake Reduction Design of Cable-stayed Bridges[J].Earthquake Engineering and Engineering Vibration,2006(2):119-124.
[3]叶爱君,范立础.超大跨度斜拉桥的横向约束体系[J].中国公路学报,2007(2):63-67.Ye Aijun,Fan Lichu.Lateral Constraint Systems for Super-long-span Cable-stayed Bridge[J].China Journal of Highway and Transport,2007(2):63-67.
[4]杨玉民,袁万城,范立础.大跨斜拉桥横向地震反应及其分形特征[J].同济大学学报,2001(1):15-19.Yang Yumin,Yuan Wancheng,Fan Lichu.TransverseSeismic Response of Long-span Cable-stayed Bridges and Their Fractal Characteristic[J].Journal of Tongji University,2001(1):15-19.
[5]刘伟庆,徐秀丽,吴晓兰,等.大跨度斜拉桥结构横向消能减震设计方法[J].振动工程学报,2006(3):426-432.Liu Weiqing,Xu Xiuli,Wu Xiaolan,etc.Design Method of Energy-dissipated Earthquake-reduction along Transverse of Long-span Cable-stayed Bridges[J].Journal of Vibration Engineering,2006(3):426-432.
[6]Yan Bin,Feng Yuncheng,Mu Zong-jun.Research on Seismic Performance for Overlapping Beam of Cable-stayed Bridge Scheme of Xia-Zhang Sea-crossing Bridge[C].Proceeding if Shanghai International Conference on Technology of Architecture and Structure,2009:367-373.
[7]余建星,王新岐.挡块对斜拉桥抗震性能的影响[J].地震工程与工程振动,2002(4):114-119.Yu Jianxing,Wang Xinqi.Influence of Block on Anti-seismic Behavior of Cable-stayed Bridge[J].Earthquake Engineering and Engineering Vibration,2002(4):114-119.
[8]JTG/TB02—01—2008,公路桥梁抗震设计细则[S].JTG/T B02—01—2008,Guidelines for Seismic Design of Highway Bridges[S].
[9]JTG D63—2007,公路桥涵地基与基础设计规范[S].JTG D63—2007,Code for Design of Ground Base and Foundation of Highway Bridges and Culverts[S].
[10]王志强,范立础.防落梁装置对隔震桥梁动力特性的影响[C]//第十四届桥梁学术会议论文集.上海:同济大学出版社,2000:811-815.Wang Zhiqiang,Fan Lichu.Effects of Collapse-proof Device on Dynamic Characteristics of seismic-isolated Bridges[C]//The14th Session of the Conference Proceedings on Bridge.Shanghai:Tongji University Press,2000:811-815.
[2]徐秀丽,刘伟庆,李龙安,等.斜拉桥结构减震设计优化研究[J].地震工程与工程振动,2006(2):119-124.Xu Xiuli,Liu Weiqing,Li Longan,etc.Optimized Earthquake Reduction Design of Cable-stayed Bridges[J].Earthquake Engineering and Engineering Vibration,2006(2):119-124.
[3]叶爱君,范立础.超大跨度斜拉桥的横向约束体系[J].中国公路学报,2007(2):63-67.Ye Aijun,Fan Lichu.Lateral Constraint Systems for Super-long-span Cable-stayed Bridge[J].China Journal of Highway and Transport,2007(2):63-67.
[4]杨玉民,袁万城,范立础.大跨斜拉桥横向地震反应及其分形特征[J].同济大学学报,2001(1):15-19.Yang Yumin,Yuan Wancheng,Fan Lichu.TransverseSeismic Response of Long-span Cable-stayed Bridges and Their Fractal Characteristic[J].Journal of Tongji University,2001(1):15-19.
[5]刘伟庆,徐秀丽,吴晓兰,等.大跨度斜拉桥结构横向消能减震设计方法[J].振动工程学报,2006(3):426-432.Liu Weiqing,Xu Xiuli,Wu Xiaolan,etc.Design Method of Energy-dissipated Earthquake-reduction along Transverse of Long-span Cable-stayed Bridges[J].Journal of Vibration Engineering,2006(3):426-432.
[6]Yan Bin,Feng Yuncheng,Mu Zong-jun.Research on Seismic Performance for Overlapping Beam of Cable-stayed Bridge Scheme of Xia-Zhang Sea-crossing Bridge[C].Proceeding if Shanghai International Conference on Technology of Architecture and Structure,2009:367-373.
[7]余建星,王新岐.挡块对斜拉桥抗震性能的影响[J].地震工程与工程振动,2002(4):114-119.Yu Jianxing,Wang Xinqi.Influence of Block on Anti-seismic Behavior of Cable-stayed Bridge[J].Earthquake Engineering and Engineering Vibration,2002(4):114-119.
[8]JTG/TB02—01—2008,公路桥梁抗震设计细则[S].JTG/T B02—01—2008,Guidelines for Seismic Design of Highway Bridges[S].
[9]JTG D63—2007,公路桥涵地基与基础设计规范[S].JTG D63—2007,Code for Design of Ground Base and Foundation of Highway Bridges and Culverts[S].
[10]王志强,范立础.防落梁装置对隔震桥梁动力特性的影响[C]//第十四届桥梁学术会议论文集.上海:同济大学出版社,2000:811-815.Wang Zhiqiang,Fan Lichu.Effects of Collapse-proof Device on Dynamic Characteristics of seismic-isolated Bridges[C]//The14th Session of the Conference Proceedings on Bridge.Shanghai:Tongji University Press,2000:811-815.
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