中承式异形钢管混凝土拱桥动力特性分析
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摘要
运用通用有限元软件ANSYS对某中承式异形钢管混凝土拱桥进行了动力特性的数值模拟分析,给出了自振频率和振型描述,并对自振特性的影响因素进行了研究。结果表明:主拱肋、竖吊杆、斜撑有助于增强拱桥的竖向刚度;副拱肋对拱桥面外振动影响较大,其外倾角影响结构整体刚度;横撑、斜撑的设置有助于提高拱肋的横向刚度,增强抗风的稳定性;二期恒载集度对竖弯振动影响较大;边界条件对拱桥的动力特性有显著影响。研究结果可以为同类桥粱的抗震设计提供参考。
Using the general finite element software ANSYS,the numerical simulation analysis was performed on a half-through special-shaped concrete-filled steel tubular(CFST) arch bridge to obtain dynamic characteristics.The self-vibration frequencies and vibration mode descriptions were given,and the influence factors on the self-vibration characteristics were also carried out.The results show that main arch rib,vertical boom and braces help to enhance the vertical stiffness of the arch bridge.Vice arch rib has a greater impact on the out-of-plane vibration and camber angle affect the overall stiffness of the structure.Transverse support and braces will improve the lateral stiffness of the arch ribs,and enhance the stability of wind resistance.The boundary conditions have great impacts on dynamic characteristics and degree of second dead load on the vertical vibration.The study results can provide a reference for the seismic design of similar bridges.
Using the general finite element software ANSYS,the numerical simulation analysis was performed on a half-through special-shaped concrete-filled steel tubular(CFST) arch bridge to obtain dynamic characteristics.The self-vibration frequencies and vibration mode descriptions were given,and the influence factors on the self-vibration characteristics were also carried out.The results show that main arch rib,vertical boom and braces help to enhance the vertical stiffness of the arch bridge.Vice arch rib has a greater impact on the out-of-plane vibration and camber angle affect the overall stiffness of the structure.Transverse support and braces will improve the lateral stiffness of the arch ribs,and enhance the stability of wind resistance.The boundary conditions have great impacts on dynamic characteristics and degree of second dead load on the vertical vibration.The study results can provide a reference for the seismic design of similar bridges.
引文
[1]陈宝春.钢管混凝土拱桥设计与施工[M].北京:人民交通出版社,1999.CHEN Bao-chun.Design and Construction of Con-crete-filled Steel Tubular Arch Bridges[M].Beijing:China Communications Press,1999.
[2]陈水盛,陈宝春.钢管混凝土拱桥动力特性分析[J].公路,2001(2):10-14.CHEN Shui-sheng,CHEN Bao-chun.Analysis of Dy-namic Characteristics of Concrete Filled Steel TubularArch Bridge[J].Highway,2001(2):10-14.
[3]ZHAO J,DE WOLF J T.Sensitivity Study for Vibra-tion Parameters Used in Damage Detection[J].Jour-nal of Structural Engineering,1999,25(4):410-416.
[4]HASSIOTIS S,JEONG G D.Identification of Stiff-ness Reduction Using Natural Frequencies[J].Journalof Engineering Mechanics,1995,121(10):1106-1113.
[5]REN W X,ZHAO T,HARIK I E.Experimental andAnalytical Modal Analysis of a Steel Arch Bridge[J].Journal of Structural Engineering,2004,130(7):1022-1031.
[6]冯仲仁,李彩霞,吴刚刚.下承式钢管混凝土拱桥自振特性的有限元分析[J].武汉理工大学学报,2005,27(7):50-53.FENG Zhong-ren,LI Cai-xia,WU Gang-gang.FiniteElement Analysis on Through Concrete-filled Steel-tubular Arch Bridges Self-vibration Characteristics[J].Journal of Wuhan University of Technology,2005,27(7):50-53.
[7]高大峰,刘伯栋,张静娟.中承式钢筋混凝土拱桥自振特性分析[J].西北地震学报,2009,31(1):75-79.GAO Da-feng,LIU Bo-dong,ZHANG Jing-juan.Analysis on Self-vibration Characteristics of Half-through Reinforced Concrete Arch Bridge[J].North-western Seismological Journal,2009,31(1):75-79.
[8]WANG H,ZHOU K G,LI A Q,et al.ParameterEffects on the Dynamic Characteristics of a Super-long-span Triple-tower Suspension Bridge[J].Journalof Zhejiang University:Science A,2010,11(5):305-316.
[9]谢静.基于现场实测的大跨斜拉桥抖振响应时域分析[D].南京:东南大学,2010.XIE Jing.Time Domain Study on Buffeting Responseof Long-span Cable-stayed Bridge Based on FieldMeasurement[D].Nanjing:Southeast University,2010.
[10]姜海波,赵人达.带边界条件损伤简支梁振动模态分析[J].振动与冲击,2004,23(2):72-74,77.JIANG Hai-bo,ZHAO Ren-da.Vibration Mode Anal-ysis of Simply Supported Beam with Damage Bounda-ry Condition[J].Journal of Vibration and Shock,2004,23(2):72-74,77.
[11]项海帆,刘光栋.拱结构的稳定与振动[M].北京:人民交通出版社,1991.XIANG Hai-fan,LIU Guang-dong.Arch StructureStability and Vibration[M].Beijing:China Communi-cations Press,1991.
[12]CECS 28:90,钢管混凝土结构设计与施工规程[S].CECS 28:90,Specification for Design and Construc-tion of Concrete-filled Steel Tubular Structures[S].
[13]杨大余,于金良,张凯.锚喷混凝土加固双曲拱桥植筋工艺参数研究[J].筑路机械与施工机械化,2011,28(6):67-69.YANG Da-yu,YU Jin-liang,ZHANG Kai.Study onParameters of Planting Steel Bars for Reinforcementof Double-curvature Arch Bridge by Spurting Con-crete[J].Road Machinery&Construction Mechaniza-tion,2011,28(6):67-69.
[14]侯林平,常国强,王丰华.在役双曲拱桥的加固方法[J].筑路机械与施工机械化,2010,27(11):65-67.HOU Lin-ping,CHANG Guo-qiang,WANG Feng-hua.Reinforcement Measures for In-service Double-curved Arch Bridge[J].Road Machinery&Construc-tion Mechanization,2010,27(11):65-67.
[15]周勇军,彭晓彬,赵煜,等.简支梁桥顺桥向地震动分析[J].交通运输工程学报,2007,7(6):86-89.ZHOU Yong-jun,PENG Xiao-bin,ZHAO Yu,et al.Analysis of Longitudinal Seismic Vibration for Sim-ply-supported Beam Bridge[J].Journal of Traffic andTransportation Engineering,2007,7(6):86-89.
[16]吴庆雄,陈宝春.钢管混凝土拱桥桥面平整度评价[J].交通运输工程学报,2010,10(4):23-28.WU Qing-xiong,CHEN Bao-chun.Deck RoughnessEvaluation of Concrete-filled Steel Tubular ArchBridge[J].Journal of Traffic and Transportation En-gineering,2010,10(4):23-28.
[17]韦建刚,陈宝春.钢管混凝土拱桥拱肋刚度设计取值分析[J].交通运输工程学报,2008,8(2):34-39.WEI Jian-gang,CHEN Bao-chun.Analysis on Rib Ri-gidity of Concrete Filled Steel Tubular Arch Bridge[J].Journal of Traffic and Transportation Engineer-ing,2008,8(2):34-39.
[2]陈水盛,陈宝春.钢管混凝土拱桥动力特性分析[J].公路,2001(2):10-14.CHEN Shui-sheng,CHEN Bao-chun.Analysis of Dy-namic Characteristics of Concrete Filled Steel TubularArch Bridge[J].Highway,2001(2):10-14.
[3]ZHAO J,DE WOLF J T.Sensitivity Study for Vibra-tion Parameters Used in Damage Detection[J].Jour-nal of Structural Engineering,1999,25(4):410-416.
[4]HASSIOTIS S,JEONG G D.Identification of Stiff-ness Reduction Using Natural Frequencies[J].Journalof Engineering Mechanics,1995,121(10):1106-1113.
[5]REN W X,ZHAO T,HARIK I E.Experimental andAnalytical Modal Analysis of a Steel Arch Bridge[J].Journal of Structural Engineering,2004,130(7):1022-1031.
[6]冯仲仁,李彩霞,吴刚刚.下承式钢管混凝土拱桥自振特性的有限元分析[J].武汉理工大学学报,2005,27(7):50-53.FENG Zhong-ren,LI Cai-xia,WU Gang-gang.FiniteElement Analysis on Through Concrete-filled Steel-tubular Arch Bridges Self-vibration Characteristics[J].Journal of Wuhan University of Technology,2005,27(7):50-53.
[7]高大峰,刘伯栋,张静娟.中承式钢筋混凝土拱桥自振特性分析[J].西北地震学报,2009,31(1):75-79.GAO Da-feng,LIU Bo-dong,ZHANG Jing-juan.Analysis on Self-vibration Characteristics of Half-through Reinforced Concrete Arch Bridge[J].North-western Seismological Journal,2009,31(1):75-79.
[8]WANG H,ZHOU K G,LI A Q,et al.ParameterEffects on the Dynamic Characteristics of a Super-long-span Triple-tower Suspension Bridge[J].Journalof Zhejiang University:Science A,2010,11(5):305-316.
[9]谢静.基于现场实测的大跨斜拉桥抖振响应时域分析[D].南京:东南大学,2010.XIE Jing.Time Domain Study on Buffeting Responseof Long-span Cable-stayed Bridge Based on FieldMeasurement[D].Nanjing:Southeast University,2010.
[10]姜海波,赵人达.带边界条件损伤简支梁振动模态分析[J].振动与冲击,2004,23(2):72-74,77.JIANG Hai-bo,ZHAO Ren-da.Vibration Mode Anal-ysis of Simply Supported Beam with Damage Bounda-ry Condition[J].Journal of Vibration and Shock,2004,23(2):72-74,77.
[11]项海帆,刘光栋.拱结构的稳定与振动[M].北京:人民交通出版社,1991.XIANG Hai-fan,LIU Guang-dong.Arch StructureStability and Vibration[M].Beijing:China Communi-cations Press,1991.
[12]CECS 28:90,钢管混凝土结构设计与施工规程[S].CECS 28:90,Specification for Design and Construc-tion of Concrete-filled Steel Tubular Structures[S].
[13]杨大余,于金良,张凯.锚喷混凝土加固双曲拱桥植筋工艺参数研究[J].筑路机械与施工机械化,2011,28(6):67-69.YANG Da-yu,YU Jin-liang,ZHANG Kai.Study onParameters of Planting Steel Bars for Reinforcementof Double-curvature Arch Bridge by Spurting Con-crete[J].Road Machinery&Construction Mechaniza-tion,2011,28(6):67-69.
[14]侯林平,常国强,王丰华.在役双曲拱桥的加固方法[J].筑路机械与施工机械化,2010,27(11):65-67.HOU Lin-ping,CHANG Guo-qiang,WANG Feng-hua.Reinforcement Measures for In-service Double-curved Arch Bridge[J].Road Machinery&Construc-tion Mechanization,2010,27(11):65-67.
[15]周勇军,彭晓彬,赵煜,等.简支梁桥顺桥向地震动分析[J].交通运输工程学报,2007,7(6):86-89.ZHOU Yong-jun,PENG Xiao-bin,ZHAO Yu,et al.Analysis of Longitudinal Seismic Vibration for Sim-ply-supported Beam Bridge[J].Journal of Traffic andTransportation Engineering,2007,7(6):86-89.
[16]吴庆雄,陈宝春.钢管混凝土拱桥桥面平整度评价[J].交通运输工程学报,2010,10(4):23-28.WU Qing-xiong,CHEN Bao-chun.Deck RoughnessEvaluation of Concrete-filled Steel Tubular ArchBridge[J].Journal of Traffic and Transportation En-gineering,2010,10(4):23-28.
[17]韦建刚,陈宝春.钢管混凝土拱桥拱肋刚度设计取值分析[J].交通运输工程学报,2008,8(2):34-39.WEI Jian-gang,CHEN Bao-chun.Analysis on Rib Ri-gidity of Concrete Filled Steel Tubular Arch Bridge[J].Journal of Traffic and Transportation Engineer-ing,2008,8(2):34-39.
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