上承式大跨度钢管混凝土拱桥地震反应分析
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摘要
为研究上承式大跨度钢管混凝土拱桥的地震反应性能,以大型有限元计算软件ANSYS为平台,分别以纵向+竖向和横向+竖向迁安波与EI Centro波作为输入地震波,对跨径为430 m的上承式钢管混凝土拱桥——支井河特大桥进行了地震反应分析。研究结果表明:前10阶振动以侧向振动为主,表明桥纵向刚度远大于侧向刚度;拱肋抗震设计最危险截面是拱脚截面,地震反应内力最大;横向+竖向地震动输入时拱肋轴力及弯矩略大于纵向+竖向地震动输入时,相差幅度不大,但横向+竖向地震动输入时弯矩My远大于纵向+竖向地震动输入;在横向+竖向地震动输入下最危险截面——拱脚处的地震反应轴力内侧拱肋大于外侧拱肋。
In order to study the seismic response of deck type long-span concrete filled steel tube(CFST) arch bridge,taking Qian′an seismic wave and EI Centro wave were taken as the input waves,Zhijinghe Great Bridge,which is the deck type CFST arch bridge with 430 m span,was analyzed with computation program ANSYS.The results show that(1) most vibrations in the first 10 orders are in the transverse direction of the bridge which indicates that stiffness in longitudinal direction is larger than that in transverse direction;(2) the section at arch springing is the most dangerous section which has the largest seismic response member forces;(3) although the axial force and moment Mz of arch rib with transverse and vertical input seismic waves are a little larger than those with longitudinal and vertical input seismic waves,the moment My with transverse and vertical input seismic waves are more larger than those with longitudinal and vertical input seismic waves;(4) the axial forces of inside arch rib at arch springing,which is the most dangerous section,are larger than those of outside arch rib with lateral and vertical input seismic waves.
In order to study the seismic response of deck type long-span concrete filled steel tube(CFST) arch bridge,taking Qian′an seismic wave and EI Centro wave were taken as the input waves,Zhijinghe Great Bridge,which is the deck type CFST arch bridge with 430 m span,was analyzed with computation program ANSYS.The results show that(1) most vibrations in the first 10 orders are in the transverse direction of the bridge which indicates that stiffness in longitudinal direction is larger than that in transverse direction;(2) the section at arch springing is the most dangerous section which has the largest seismic response member forces;(3) although the axial force and moment Mz of arch rib with transverse and vertical input seismic waves are a little larger than those with longitudinal and vertical input seismic waves,the moment My with transverse and vertical input seismic waves are more larger than those with longitudinal and vertical input seismic waves;(4) the axial forces of inside arch rib at arch springing,which is the most dangerous section,are larger than those of outside arch rib with lateral and vertical input seismic waves.
引文
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[8]周劲草,严志刚,盛洪飞.大跨度中承式钢管混凝土拱桥的面内动力特性分析[J].公路交通科技,2005,22(9):87-89.ZHOU Jincao,YAN Zhigang,SHENG Hongfei.Planar DynamicCharacteristics Analysis for Long-span Semi-Supported CFSTARCH Bridges[J].Journal of Highway and Transportation Re-search and Development,2005,22(9):87-89.
[9]李国毫.桥梁结构稳定与振动[M].北京:中国铁道出版社,1996:558-560.LI Guohao.Stabilization and Vibration of Bridge[M].Be-ijing:China Railway Publishing House,1996:558-560.
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[11]黄福云,陈宝春.钢管混凝土拱桥初应力问题[J].公路交通科技,2006,23(11):68-72.HUANG Fuyun,CHEN Baochun.Review of Initial Stress onConcrete Filled Steel Tubular Arch Bridge[J].Journal ofHighway and Transportation Research and Developme-nt,2006,23(11):68-72.
[12]马俊,盛洪飞,孙航.钢管混凝土拱肋滞回性能非线性有限元分析[J].公路交通科技,2006,23(8):84-88,92.MA Jun,SHENG Hongfei,SUN Hang.Nonlinear Finite Ele-ment Analysis of Hysteretic Behaviors for Concrete Filled SteelTube Arches[J].Journal of Highway and Transportation Re-search and Development,2006,23(8):84-88,92.
[2]郑史雄,周述华,丁桂保.大跨度钢管混凝土拱桥的地震反应性能[J].西南交通大学学报,1999,34(3):320-324.ZHENG Shixiong,ZHOU Shuhua,DING Guibao.The SeismicResponse Behavior of Long Span CFST Arch Bridge[J].Jou-rnal of Southwest Jiaotong University,1999,34(3):320-324.
[3]赵灿晖,周志祥.大跨度钢管混凝土拱桥非线性地震响应分析[J].重庆建筑大学学报,2006,28(2):47-51.ZHAO Canhui,ZHOU Zhixiang.Nonlinear Seismic ResponseAnalysis of Long-Span CFST Arch Bridge[J].Journal ofChongqing Jianzhu University,2006,28(2):47-51.
[4]苏虹,胡世德.钢管混凝土拱桥的地震响应分析方法[J].同济大学学报,2003,31(4):404-407.SU Hong,HU Shide.Methods of Seismic Response Analysis ofConcrete-filled-tube Arch Bridges[J].Journal of Tongji Uni-versity,2003,31(4):404-407.
[5]孙潮,吴庆雄,陈宝春.钢管混凝土拱桥车振性能分析[J].公路交通科技,2007,9(12):54-59.SUN Chao,WU Qingxiong,CHEN Baochun.Analysis on Dy-namic Behavior of Concrete Filled Steel Tubular Arch Bridgeunder Vehicle Moving Loads[J].Journal of Highway andTransportation Research and Development,2007,9(12):54-59.
[6]赵河清,徐亮,杨惠林,等.大跨度上承式钢管混凝土拱桥的稳定性分析[J].公路交通科技,2006,23(11):82-85.ZHAO HeOqing,XU Liang,YANG Huilin,et al.StabilityAnalysis of Long-span Deck-type CFST Arch Bridge[J].Jou-rnal of Highway and Transportation Research and Development,2006,23(11):82-85.
[7]李睿,叶燎原,陈瑛.城市特宽拱桥的空间静动力有限元分析[J].公路交通科技,2007,12(10):86-89,112.LI Rui,YE Liaoyuan,CHEN Ying.Static and Dynamic Spa-tial Analysis of Super-wide Arch Bridge Using Finite ElementMethod[J].Journal of Highway and Transportation Researchand Development,2007,12(10):86-89,112.
[8]周劲草,严志刚,盛洪飞.大跨度中承式钢管混凝土拱桥的面内动力特性分析[J].公路交通科技,2005,22(9):87-89.ZHOU Jincao,YAN Zhigang,SHENG Hongfei.Planar DynamicCharacteristics Analysis for Long-span Semi-Supported CFSTARCH Bridges[J].Journal of Highway and Transportation Re-search and Development,2005,22(9):87-89.
[9]李国毫.桥梁结构稳定与振动[M].北京:中国铁道出版社,1996:558-560.LI Guohao.Stabilization and Vibration of Bridge[M].Be-ijing:China Railway Publishing House,1996:558-560.
[10]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,2004:16-17.FAN Lichu,HU Shide,YE Aijun.The Earthquake ResistanceDesign of Long-Span Bridge[M].Beijing:China Communi-cations Press,2004:16-17.
[11]黄福云,陈宝春.钢管混凝土拱桥初应力问题[J].公路交通科技,2006,23(11):68-72.HUANG Fuyun,CHEN Baochun.Review of Initial Stress onConcrete Filled Steel Tubular Arch Bridge[J].Journal ofHighway and Transportation Research and Developme-nt,2006,23(11):68-72.
[12]马俊,盛洪飞,孙航.钢管混凝土拱肋滞回性能非线性有限元分析[J].公路交通科技,2006,23(8):84-88,92.MA Jun,SHENG Hongfei,SUN Hang.Nonlinear Finite Ele-ment Analysis of Hysteretic Behaviors for Concrete Filled SteelTube Arches[J].Journal of Highway and Transportation Re-search and Development,2006,23(8):84-88,92.
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