横撑及桥面系对钢管混凝土拱桥动力响应的影响分析
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摘要
横撑和桥面系作为钢管混凝土拱桥的重要组成部分对结构整体动力响应会产生很大的影响。以茅草街大桥为例,建立了中承式钢管混凝土拱桥不同横撑和桥面系布置形式的有限元模型,采用三向地震波同时输入的形式,得到6种工况在相同地震波作用下的不同动力响应,提取出拱肋的弯矩和位移包络图,并对面内弯矩、面外弯矩、竖向位移、横桥向位移进行了比较和分析。结果表明,桥面系对拱肋的响应影响很大;拱肋与桥面系结合处位移、内力均较大,在设计中应予以关注;在保证横向刚度的前提下,横撑需进行优化布置,以使得拱桥动力响应更加合理安全。
As the important components of CFST arch bridges,the cross beams and bridge decks affect the bridges' dynamic response magnificently.Based on the Maocaojie Bridge,the FEM models of half-through CFST arch bridges with different arrangements of cross beams and bridge decks were built.The different seismic responses of six operating conditions were calculated with three dimensional earthquake waves input.The internal forces and displacement envelope diagrams of arch ribs were extracted,compared and analyzed in situations of in-plane moment,out-plane moment,vertical displacement and transverse displacement.The result shows that(1) the bridge decks affect the response of arch rib greatly;(2) the joint section between arch rib and bridge deck should be designed carefully because of its large displacement and internal force;(3) the cross beams should be optimized to safety the arch bridge dynamic response considering lateral rigidity.
As the important components of CFST arch bridges,the cross beams and bridge decks affect the bridges' dynamic response magnificently.Based on the Maocaojie Bridge,the FEM models of half-through CFST arch bridges with different arrangements of cross beams and bridge decks were built.The different seismic responses of six operating conditions were calculated with three dimensional earthquake waves input.The internal forces and displacement envelope diagrams of arch ribs were extracted,compared and analyzed in situations of in-plane moment,out-plane moment,vertical displacement and transverse displacement.The result shows that(1) the bridge decks affect the response of arch rib greatly;(2) the joint section between arch rib and bridge deck should be designed carefully because of its large displacement and internal force;(3) the cross beams should be optimized to safety the arch bridge dynamic response considering lateral rigidity.
引文
[1]陈宝春.钢管混凝土拱桥结构设计探讨[C]//第14届全国桥梁学术会议论文集.南京:2000:505-510.CHEN Baochun.Design Discussion of CFST Arch Structrues[C]//Proceedings of the 14th National Conference on BridgeStructure.Nanjing:2000:505-510.
[2]云迪,张素梅.横撑布置形式对某中承式CFST拱桥动力特性的影响[J].哈尔滨工业大学学报,2003,35(增刊):259-262.YUN Di,ZHANG Sumei.Influence of Transverse Braces Ar-rangement on Dynamic Characteristics of Half-through CFSTArch Bridge[J].Journal of Harbin Institute of Technology,2003,35(sup):259-262.
[3]文峰,李寿英,刘慕广,等.横撑布置方式对钢管混凝土拱桥动力特性的影响[J].国防交通工程与技术,2007(2):43-45.WEN Feng,LI Shouying,LIU Muguang,et a.lEffects of Trans-verse Brace Arrangements on the Dynamic Characteristics of CFSTArch Bridges[J].Traffic Engineering and Technology for Na-tional Defence,2007(2):43-45.
[4]赵跃宇,金波,劳文全.横撑对钢管混凝土拱桥力学性能的影响分析[J].湖南交通科技,2006,32(3):100-102.ZHAO Yueyu,JIN Bo,LAO Wenquan.Influence of TransverseBraces Arrangement on Mechanical Characteristics of CFST ArchBridge[J]Hunan Communication Science and Technology,2006,32(3):100-102.
[5]彭卫,张新军.大跨径钢管混凝土拱桥的稳定与振动[J].公路,2006(4):120-123.PENG Wei,ZHANG Xinjun.Stability and Vibration of Long SpanCFST Arch Bridges[J].Highway,2006(4):120-124.
[6]李玲瑶,陈政清,葛耀君.钢管混凝土拱桥拱肋横撑对动力和稳定性的影响[J].公路交通科技,2008,25(3):70-74.LI Lingyao,CHEN Zhengqing,GE Yaojun.Effects of ArchRib Crossbars on Dynamic and Stabilization Characteristics ofConcrete Filled Steel Tubular Arch Bridge[J].Journal ofHighway and Transportation Research and Development,2008,25(3):70-74.
[7]杨海平,赵灿辉,陈舣亦.肋间横撑对钢管混凝土拱桥稳定性的影响[J].公路交通技术,2005(2):89-91.YANG Haiping,ZHAO Canhui,CHEN Yiyi.Effect of Trans-verse Brace on Stability of Concrete-filled Steel Tube ArchBridges[J].Technology of Highway and Transport,2005(2):89-91.
[8]周水兴,胡免缢,周先颖.桥道系结构形式对中承式钢管混凝土拱桥受力影响分析[J].公路交通科技,2005,22(4):57-60.ZHOU Shuixing,HUMianyi,ZHOU Xianying.Mechanics Analy-sis of Half-through CFST Arch Bridges with Different Bridge DeckTypes[J].Journal of Highway and Transportation Research andDevelopment,2005,22(4):57-60.
[9]胡免缢,周水兴,周先颖.大跨中承式钢管混凝土拱桥桥道系合理位置分析[J].公路交通科技,2005,22(6):82-84.HU Mianyi,ZHOU Shuixing,ZHOU Xianying.Analysis of theBest Bridge Deck’s Relative Position for Long-span Half-through CFST Arch Bridge[J].Journal of Highway andTransportation Research and Development,2005,22(6):82-84.
[10]周水兴,陈山林.桥道系对钢管混凝土拱桥吊杆受力影响的研究[J].桥梁建设,2007(2):28-31.ZHOU Shuixing,CHEN Shanlin.Study of Influences of FloorSystems on Structural Behavior of Suspenders of Concrete-FilledSteel Tube Arch Bridges[J].Bridge Construction,2007(2):28-31.
[11]王连华,赵跃宇,易壮鹏.系杆对钢管混凝土拱桥抗震性能的影响[J].地震工程与工程振动,2007,27(1):59-65.WANG Lianhua,ZHAO Yueyu,YI Zhuangpeng.Effects of Tie-bars on Seismic Behavior of CFST Arch Bridges[J].Journal ofEarthquake Engineering and Engineering Vibration,2007,27(1):59-65.
[12]曹晓岩,孙明哲,付金科.钢管混凝土中承拱桥吊杆横梁受力性能分析[J].世界地震工程,2004,20(2):73-76.CAO Xiaoyan,SUN Mingzhe,FU Jinke.Load Bearing Capac-ity Test of Suspension Member Transversal Girder of CFST Half-through Arch Bridge[J].World Information On EarthquakeEngineering,2004,20(2):73-76.
[2]云迪,张素梅.横撑布置形式对某中承式CFST拱桥动力特性的影响[J].哈尔滨工业大学学报,2003,35(增刊):259-262.YUN Di,ZHANG Sumei.Influence of Transverse Braces Ar-rangement on Dynamic Characteristics of Half-through CFSTArch Bridge[J].Journal of Harbin Institute of Technology,2003,35(sup):259-262.
[3]文峰,李寿英,刘慕广,等.横撑布置方式对钢管混凝土拱桥动力特性的影响[J].国防交通工程与技术,2007(2):43-45.WEN Feng,LI Shouying,LIU Muguang,et a.lEffects of Trans-verse Brace Arrangements on the Dynamic Characteristics of CFSTArch Bridges[J].Traffic Engineering and Technology for Na-tional Defence,2007(2):43-45.
[4]赵跃宇,金波,劳文全.横撑对钢管混凝土拱桥力学性能的影响分析[J].湖南交通科技,2006,32(3):100-102.ZHAO Yueyu,JIN Bo,LAO Wenquan.Influence of TransverseBraces Arrangement on Mechanical Characteristics of CFST ArchBridge[J]Hunan Communication Science and Technology,2006,32(3):100-102.
[5]彭卫,张新军.大跨径钢管混凝土拱桥的稳定与振动[J].公路,2006(4):120-123.PENG Wei,ZHANG Xinjun.Stability and Vibration of Long SpanCFST Arch Bridges[J].Highway,2006(4):120-124.
[6]李玲瑶,陈政清,葛耀君.钢管混凝土拱桥拱肋横撑对动力和稳定性的影响[J].公路交通科技,2008,25(3):70-74.LI Lingyao,CHEN Zhengqing,GE Yaojun.Effects of ArchRib Crossbars on Dynamic and Stabilization Characteristics ofConcrete Filled Steel Tubular Arch Bridge[J].Journal ofHighway and Transportation Research and Development,2008,25(3):70-74.
[7]杨海平,赵灿辉,陈舣亦.肋间横撑对钢管混凝土拱桥稳定性的影响[J].公路交通技术,2005(2):89-91.YANG Haiping,ZHAO Canhui,CHEN Yiyi.Effect of Trans-verse Brace on Stability of Concrete-filled Steel Tube ArchBridges[J].Technology of Highway and Transport,2005(2):89-91.
[8]周水兴,胡免缢,周先颖.桥道系结构形式对中承式钢管混凝土拱桥受力影响分析[J].公路交通科技,2005,22(4):57-60.ZHOU Shuixing,HUMianyi,ZHOU Xianying.Mechanics Analy-sis of Half-through CFST Arch Bridges with Different Bridge DeckTypes[J].Journal of Highway and Transportation Research andDevelopment,2005,22(4):57-60.
[9]胡免缢,周水兴,周先颖.大跨中承式钢管混凝土拱桥桥道系合理位置分析[J].公路交通科技,2005,22(6):82-84.HU Mianyi,ZHOU Shuixing,ZHOU Xianying.Analysis of theBest Bridge Deck’s Relative Position for Long-span Half-through CFST Arch Bridge[J].Journal of Highway andTransportation Research and Development,2005,22(6):82-84.
[10]周水兴,陈山林.桥道系对钢管混凝土拱桥吊杆受力影响的研究[J].桥梁建设,2007(2):28-31.ZHOU Shuixing,CHEN Shanlin.Study of Influences of FloorSystems on Structural Behavior of Suspenders of Concrete-FilledSteel Tube Arch Bridges[J].Bridge Construction,2007(2):28-31.
[11]王连华,赵跃宇,易壮鹏.系杆对钢管混凝土拱桥抗震性能的影响[J].地震工程与工程振动,2007,27(1):59-65.WANG Lianhua,ZHAO Yueyu,YI Zhuangpeng.Effects of Tie-bars on Seismic Behavior of CFST Arch Bridges[J].Journal ofEarthquake Engineering and Engineering Vibration,2007,27(1):59-65.
[12]曹晓岩,孙明哲,付金科.钢管混凝土中承拱桥吊杆横梁受力性能分析[J].世界地震工程,2004,20(2):73-76.CAO Xiaoyan,SUN Mingzhe,FU Jinke.Load Bearing Capac-ity Test of Suspension Member Transversal Girder of CFST Half-through Arch Bridge[J].World Information On EarthquakeEngineering,2004,20(2):73-76.
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