地震作用下独塔斜拉桥合理约束体系
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摘要
为了确定在一致地震作用下独塔斜拉桥的合理抗震约束体系,本文首先对独塔斜拉桥在纵桥向和横桥向约束体系的传力机理进行了研究,然后以松花江大桥为研究对象,采用非线性时程分析方法,分析了墩、梁以及塔梁的纵向约束体系和横向约束体系对独塔斜拉桥地震反应的影响。分析表明,考虑支座滑动摩擦能显著减少独塔斜拉桥主梁和主塔的纵向位移,降低塔底的弯矩;由于独塔斜拉桥的主塔在横桥向对主梁的强大约束作用,边跨过渡墩和辅助墩的横向约束体系与主跨主梁的横向约束体系相互影响很小。
In order to find out the appropriate seismic constraint system for simple-tower cable-stayed bridges under consistent earthquake,principle of distributing the inertia forces longitudinally and tranverslly was analysed firstly.Then the seismic responses of simple-tower cable-stayed with different longitudinal constraint systems and lateral constraint systems between piers or tower and girder were calculated by taking the songhuajiang highway bridge as a studying object,and using the nonlinear time-history analysis method.The results indicate that,for simple-tower cable-stayed bridges,greatly reduce the longitudinal displacement of the girder and tower,and the moment at the bottom of the tower can be reduced greatly considering the sliding friction owing to large lateral constraint of tower to girder,lateral constraint systems of side-span piers have less influence on the girder of main-span,vice verse.
In order to find out the appropriate seismic constraint system for simple-tower cable-stayed bridges under consistent earthquake,principle of distributing the inertia forces longitudinally and tranverslly was analysed firstly.Then the seismic responses of simple-tower cable-stayed with different longitudinal constraint systems and lateral constraint systems between piers or tower and girder were calculated by taking the songhuajiang highway bridge as a studying object,and using the nonlinear time-history analysis method.The results indicate that,for simple-tower cable-stayed bridges,greatly reduce the longitudinal displacement of the girder and tower,and the moment at the bottom of the tower can be reduced greatly considering the sliding friction owing to large lateral constraint of tower to girder,lateral constraint systems of side-span piers have less influence on the girder of main-span,vice verse.
引文
[1]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,2007,20(2):63-67.
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[3]张文学,李建中,李怀峰.低重心斜拉桥地震响应特性研究[J].桥梁建设,2007(5):21-23.
[4]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,2006,34(7):860-863.
[5]蒋伟,李洞明,李杨.塔梁间纵向弹性约束对斜拉桥抗震性能的影响[J].现代交通技术,2007,4(5):50-52.
[6]倪燕平,赵会东,周世军.独塔斜拉桥动力分析[J].甘肃科技,2005,21(6):134-137.
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[8]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.
[9]闫冬,袁万城.多跨连接梁桥横桥向抗震的概念设计[J].同济大学学报,2003,31(11):1275-1279.
[10]项海帆,李瑞森,杨昌众.悬浮体系斜张桥的近似抗震计算[J].结构工程师,1986(1):64-69.
[11]Moon S J,Bergman L A,Voulgaris P G.Sliding modecontrol of cable-stayed bridge subjected to seismicexcitation[J].Journal of Engineering Mechanics,2003,129(1):71-78.
[12]Abdel-Ghaffar A M,Khalifa M A.Important of cablevibration in dynamics of cable-stayed bridges[J].Journal of Engineering Mechanics,1991,117(11):2571-2589.
[13]Kawashima K,Unjoh S,Tunomoto M.Estimation ofdamping ratio of cable-stayed bridges for seismicdesign[J].Journal of Structural Engineering,1993,119(4):1015-1031.
[14]Ren Weixin,Obata M.Elastic-plastic seismic behaviorof long span cable-stayed bridges[J].Journal ofBridge Engineering,1999,4(3):194-203.
[15]He W L,Agrawal A K,Mahmoud K.Control ofseismically excited cable-stayed bridge using resettingsemiactive stiffness dampers[J].Journal of BridgeEngineering,2001,6(6):376-384.
[16]Jung Hyungjo,Spencer B F,Lee Inwon.Control ofseismically excited cable-stayed bridge employingmagnetorheological fluid dampers[J].JournalofStructural Engineering,2003,129(7):873-883.
[17]Abdel-Ghaffar A M,Nazmy A S.3-D nonlinearseismic behavior of cable-stayed bridges[J].Journalof Structural Engineering,1991,117(11):3456-3476.
[18]Hose Y,Silva P,Seible F.Development of aperformance evaluation database for concrete bridgecomponents and systems under simulated seismicloads[J].Earthquake Spectra,2000,16(2):413-442.
[19]Chopra A K.Dynamics of Structures-Theory andapplications to Earthquake Engineering(SecondEdition)[M].Beijing:the Press of TSINGHUAUniversity,2005.
[20]施新欢,阮欣,许慧峰.大跨径无背索斜拉桥的动力特性分析[J].结构工程师,2006,22(5):54-57.
[21]魏红一,胡世德,范立础.对斜拉桥总体设计参数的讨论[J].结构工程师,2003(3):7-11.
[2]布占宇,谢旭.不同阻尼计算模式对斜拉桥地震响应分析的影响[J].中国铁道科学,2006,27(2):46-51.
[3]张文学,李建中,李怀峰.低重心斜拉桥地震响应特性研究[J].桥梁建设,2007(5):21-23.
[4]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,2006,34(7):860-863.
[5]蒋伟,李洞明,李杨.塔梁间纵向弹性约束对斜拉桥抗震性能的影响[J].现代交通技术,2007,4(5):50-52.
[6]倪燕平,赵会东,周世军.独塔斜拉桥动力分析[J].甘肃科技,2005,21(6):134-137.
[7]金增洪.缆索支撑桥梁[M].北京:人民交通出版社,2002.
[8]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.
[9]闫冬,袁万城.多跨连接梁桥横桥向抗震的概念设计[J].同济大学学报,2003,31(11):1275-1279.
[10]项海帆,李瑞森,杨昌众.悬浮体系斜张桥的近似抗震计算[J].结构工程师,1986(1):64-69.
[11]Moon S J,Bergman L A,Voulgaris P G.Sliding modecontrol of cable-stayed bridge subjected to seismicexcitation[J].Journal of Engineering Mechanics,2003,129(1):71-78.
[12]Abdel-Ghaffar A M,Khalifa M A.Important of cablevibration in dynamics of cable-stayed bridges[J].Journal of Engineering Mechanics,1991,117(11):2571-2589.
[13]Kawashima K,Unjoh S,Tunomoto M.Estimation ofdamping ratio of cable-stayed bridges for seismicdesign[J].Journal of Structural Engineering,1993,119(4):1015-1031.
[14]Ren Weixin,Obata M.Elastic-plastic seismic behaviorof long span cable-stayed bridges[J].Journal ofBridge Engineering,1999,4(3):194-203.
[15]He W L,Agrawal A K,Mahmoud K.Control ofseismically excited cable-stayed bridge using resettingsemiactive stiffness dampers[J].Journal of BridgeEngineering,2001,6(6):376-384.
[16]Jung Hyungjo,Spencer B F,Lee Inwon.Control ofseismically excited cable-stayed bridge employingmagnetorheological fluid dampers[J].JournalofStructural Engineering,2003,129(7):873-883.
[17]Abdel-Ghaffar A M,Nazmy A S.3-D nonlinearseismic behavior of cable-stayed bridges[J].Journalof Structural Engineering,1991,117(11):3456-3476.
[18]Hose Y,Silva P,Seible F.Development of aperformance evaluation database for concrete bridgecomponents and systems under simulated seismicloads[J].Earthquake Spectra,2000,16(2):413-442.
[19]Chopra A K.Dynamics of Structures-Theory andapplications to Earthquake Engineering(SecondEdition)[M].Beijing:the Press of TSINGHUAUniversity,2005.
[20]施新欢,阮欣,许慧峰.大跨径无背索斜拉桥的动力特性分析[J].结构工程师,2006,22(5):54-57.
[21]魏红一,胡世德,范立础.对斜拉桥总体设计参数的讨论[J].结构工程师,2003(3):7-11.
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