桥墩形式对连续刚构桥动力特性的影响
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摘要
以西禹高速公路杏沟连续刚构桥为研究对象,采用ANSYS有限元程序,并考虑边跨支座处的弹性约束作用,建立了该连续刚构桥动力计算的整体空间有限元计算模型,探讨了连续刚构桥采用钢筋混凝土四柱式桥墩、双薄壁空心墩、单薄壁空心墩及独柱实心墩时的动力性能。计算结果表明:4类桥梁自振频率依次增大,四柱式桥墩和双薄壁空心墩的桥梁振动以桥墩弯曲为主,单薄壁空心墩和独柱实心墩的桥梁振动以桥面弯曲为主;在不同地震波作用下,由于地震波的卓越周期以及结构自振特性等不尽相同,4类结构的动力反应也不尽相同。
Regarded Xinggou Continuous Rigid Frame Bridge on Xiyu Expressway as research object,in consideration of the effect of elastic restraint in side span bearing,the finite element program ANSYS was used to establish the overall spatial finite element calculating model of the bridge.Dynamic characteristics of the continuous rigid frame bridge with reinforced concrete tetrastyle bridge pier,the double thin wall hollow pillar,the frail wall hollow pillar and the alone column solid pillar were discussed.The calculation results indicate that four kinds of bridge self-vibration frequencies increase in turn.The expressions of bridge vibrations of the reinforced concrete tetrastyle bridge pier and the double thin wall hollow pillar are bridge pier curving primarily.The expressions of bridge vibrations of the frail wall hollow pillar and the alone column solid pillar are bridge floor curving primarily.Because predominant period of the seismic wave as well as the structure self-vibration characteristic are different,four kinds of structural dynamic responses are also different under different seismic wave actions.
Regarded Xinggou Continuous Rigid Frame Bridge on Xiyu Expressway as research object,in consideration of the effect of elastic restraint in side span bearing,the finite element program ANSYS was used to establish the overall spatial finite element calculating model of the bridge.Dynamic characteristics of the continuous rigid frame bridge with reinforced concrete tetrastyle bridge pier,the double thin wall hollow pillar,the frail wall hollow pillar and the alone column solid pillar were discussed.The calculation results indicate that four kinds of bridge self-vibration frequencies increase in turn.The expressions of bridge vibrations of the reinforced concrete tetrastyle bridge pier and the double thin wall hollow pillar are bridge pier curving primarily.The expressions of bridge vibrations of the frail wall hollow pillar and the alone column solid pillar are bridge floor curving primarily.Because predominant period of the seismic wave as well as the structure self-vibration characteristic are different,four kinds of structural dynamic responses are also different under different seismic wave actions.
引文
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[16]吴文清,陈小刚,李波,等.预应力混凝土连续箱梁施工质量评价指标调查[J].建筑科学与工程学报,2009,26(3):42-48.WU Wen-qing,CHEN Xiao-gang,LI Bo,et al.Inves-tigation of Construction Quality Evaluating Indices inPC Continuous Box-girder[J].Journal of Architectureand Civil Engineering,2009,26(3):42-48.
[17]蒋丽忠,曾丽娟,孙林林.钢-混凝土连续组合梁腹板局部屈曲分析[J].建筑科学与工程学报,2009,26(3):27-31.JIANG Li-zhong,ZENG Li-juan,SUN Lin-lin.LocalBuckling Analysis of Web of Continuous Steel-con-crete Composite Beam[J].Journal of Architecture andCivil Engineering,2009,26(3):27-31.
[18]邹科官,王浩,梁书亭.中央扣对三塔悬索桥动力特性的影响[J].建筑科学与工程学报,2009,26(4):49-53.ZOU Ke-guan,WANG Hao,LIANG Shu-ting.Influ-ences of Central Buckles on Dynamic Behaviors ofTriple-tower Suspension Bridge[J].Journal of Archi-tecture and Civil Engineering,2009,26(4):49-53.
[19]刘永健,刘剑,朱铭,等.双层桥面三桁刚性悬索加劲钢桁梁桥全桥静动力模型设计[J].建筑科学与工程学报,2008,25(1):84-87,95.LIU Yong-jian,LIU Jian,ZHU Ming,et al.Static andDynamic Model Design of Total Bridge of Double-deck and Three Main Trusses Steel Bridge with RigidCable[J].Journal of Architecture and Civil Engineer-ing,2008,25(1):84-87,95.
[20]李德建,彭彦.既有简支铰接空心板梁桥结构状况动力评估[J].建筑科学与工程学报,2009,26(4):24-29.LI De-jian,PENG Yan.Dynamic Assessment AboutExisting Simply-supported Hinge Joint Celluar SlabBridges[J].Journal of Architecture and Civil En-gineering,2009,26(4):24-29.
[2]范立础.预应力混凝土桥梁[M].北京:人民交通出版社,1988.FAN Li-chu.Prestressed Concrete Bridge[M].Bei-jing:China Communications Press,1988.
[3]陈淮,朱倩,李静斌,等.结构参数变化对斜靠式拱桥动力特性的影响[J].中国公路学报,2009,22(1):47-52.CHEN Huai,ZHU Qian,LI Jing-bin,et al.Influenceof Structural Parameter Variation on Dynamic Char-acteristic of Leaning-type Arch Bridge[J].China Jour-nal of Highway and Transport,2009,22(1):47-52.
[4]王波,张海龙,武修雄,等.基于大质量法的高墩大跨连续刚构桥地震时程反应分析[J].桥梁建设,2006(5):17-20.WANG Bo,ZHANG Hai-long,WU Xiu-xiong,et al.Analysis of Seismic Time-history Response of High-rise Pier and Long Span Continuous Rigid-frameBridge Based on Great Mass Method[J].Bridge Con-struction,2006(5):17-20.
[5]谢肖礼,王波,张伟峰,等.罕遇地震作用下高墩连续刚构桥双重非线性抗震分析[J].工程力学,2009,26(4):113-118.XIE Xiao-li,WANG Bo,ZHANG Wei-feng,et al.Double Nonlinear Aseismic Analysis of High-rise Pierand Rigid Frame Bridges Under Rear Earthquake[J].Engineering Mechanics,2009,26(4):113-118.
[6]何钦象,田小红,宋丹.高墩大跨径连续刚构桥抗震性能评估[J].振动与冲击,2009,28(1):68-71.HE Qin-xiang,TIAN Xiao-hong,SONG Dan.Aseis-matic Performance Evaluation of a Long-span Contin-uous Rigid Frame Bridge with Tall Piers[J].Journalof Vibration and Shock,2009,28(1):68-71.
[7]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,2002.LI Guo-hao.Stability and Vibration of Bridge Struc-ture[M].Beijing:China Railway Publishing House,2002.
[8]王达,黄平明,张光国,等.PC斜拉式桁架梁桥动力特性[J].长安大学学报:自然科学版,2006,26(6):39-43.WANG Da,HUANG Ping-ming,ZHANG Guang-guo,et al.Dynamic Characteristics of PC Cable StayedTruss Bridge[J].Journal of Chang an University:Natural Science Edition,2006,26(6):39-43.
[9]石雄伟,刘海鹏,周勇军,等.双薄壁墩间距对连续刚构桥地震响应的影响[J].交通运输工程学报,2010,10(3):35-40.SHI Xiong-wei,LIU Hai-peng,ZHOU Yong-jun,et al.Effect of Double-thin-wall Distance on SeismicResponse of Continuous Rigid Frame Bridge[J].Jour-nal of Traffic and Transportation Engineering,2010,10(3):35-40.
[10]邰扣霞,丁大钧.中国桥梁建设新飞跃[J].建筑科学与工程学报,2006,23(2):30-40.TAI Kou-xia,DING Da-jun.New Leaps in Construc-tion of Bridges in China[J].Journal of Architectureand Civil Engineering,2006,23(2):30-40.
[11]WU J J.Dynamic Analysis of an Inclined Beam Due toMoving Loads[J].Journal of Sound and Vibration,2005,288(1/2):107-131.
[12]MANEETES H,LINZELL D G.Cross-frame andLateral Bracing Influence on Curved Steel Bridge FreeVibration Response[J].Journal of ConstructionalSteel Research,2003,59(9):1101-1117.
[13]刘健新,李加武.中国西部地区桥梁风工程研究[J].建筑科学与工程学报,2005,22(4):32-39.LIU Jian-xin,LI Jia-wu.Study of Wind Project ofBridge in Western Area of China[J].Journal of Archi-tecture and Civil Engineering,2005,22(4):32-39.
[14]胡大琳,黄小国,赵国辉,等.考虑结构-水相互作用的连续刚构桥水平地震反应分析[J].建筑科学与工程学报,2008,25(2):79-84.HU Da-lin,HUANG Xiao-guo,ZHAO Guo-hui,et al.Horizontal Seismic Response Analysis of ContinuousRigid Frame Bridges Considering Structure-waterInteraction[J].Journal of Architecture and Civil En-gineering,2008,25(2):79-84.
[15]黄小国,胡大琳,张后举.行波效应对大跨度连续刚构桥地震反应的影响[J].长安大学学报:自然科学版,2008,28(1):72-76.HUANG Xiao-guo,HU Da-lin,ZHANG Hou-ju.Effects of Traveling Wave to Seismic Response ofLong Span Rigid-framed Bridge[J].Journal ofChang an University:Natural Science Edition,2008,28(1):72-76.
[16]吴文清,陈小刚,李波,等.预应力混凝土连续箱梁施工质量评价指标调查[J].建筑科学与工程学报,2009,26(3):42-48.WU Wen-qing,CHEN Xiao-gang,LI Bo,et al.Inves-tigation of Construction Quality Evaluating Indices inPC Continuous Box-girder[J].Journal of Architectureand Civil Engineering,2009,26(3):42-48.
[17]蒋丽忠,曾丽娟,孙林林.钢-混凝土连续组合梁腹板局部屈曲分析[J].建筑科学与工程学报,2009,26(3):27-31.JIANG Li-zhong,ZENG Li-juan,SUN Lin-lin.LocalBuckling Analysis of Web of Continuous Steel-con-crete Composite Beam[J].Journal of Architecture andCivil Engineering,2009,26(3):27-31.
[18]邹科官,王浩,梁书亭.中央扣对三塔悬索桥动力特性的影响[J].建筑科学与工程学报,2009,26(4):49-53.ZOU Ke-guan,WANG Hao,LIANG Shu-ting.Influ-ences of Central Buckles on Dynamic Behaviors ofTriple-tower Suspension Bridge[J].Journal of Archi-tecture and Civil Engineering,2009,26(4):49-53.
[19]刘永健,刘剑,朱铭,等.双层桥面三桁刚性悬索加劲钢桁梁桥全桥静动力模型设计[J].建筑科学与工程学报,2008,25(1):84-87,95.LIU Yong-jian,LIU Jian,ZHU Ming,et al.Static andDynamic Model Design of Total Bridge of Double-deck and Three Main Trusses Steel Bridge with RigidCable[J].Journal of Architecture and Civil Engineer-ing,2008,25(1):84-87,95.
[20]李德建,彭彦.既有简支铰接空心板梁桥结构状况动力评估[J].建筑科学与工程学报,2009,26(4):24-29.LI De-jian,PENG Yan.Dynamic Assessment AboutExisting Simply-supported Hinge Joint Celluar SlabBridges[J].Journal of Architecture and Civil En-gineering,2009,26(4):24-29.
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