PC桁架连续刚构桥动力特性研究
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摘要
为评价预应力混凝土桁架连续刚构桥的动力性能,以湖北省归州大桥动力试验为背景,测试了结构的频率、振型、阻尼比和不同行车速度、不同路况下结构的冲击系数。建立了基于不同假定的3种空间有限元计算模型,计算了结构的振动频率和振型,与实桥动力试验结果进行了对比分析;研究了结构刚度、横向联系、桥墩高度、边界约束条件等参数对结构动力特性的影响。结果表明,横铺桥面板对提高结构横向刚度和扭转刚度有较大的贡献;结构的横向刚度和纵向刚度相对竖向刚度和扭转刚度较小;结构振动衰减正常,桥面平整度较好,具有良好的行车性能;结构整体刚度、桥墩高度及边界约束条件是影响结构横向和纵向振动的主要因素;横向联系是影响结构的局部扭转振动的主要因素。
For evaluation of the dynamic property of the prestressed concrete continuous rigid-frame bridge,dynamic loading tests were made on Guizhou Bridge in Hubei Province,the vibration frequencies,modes,damping ratios and impact coefficients with different driving speeds and surface roughnesses of bridge deck were tested.Three space finite element calculation models based on different kinds assumptions were built.The vibration frequencies and modes of the bridge were calculated,and the comparative analysis between the calculation result and the test result was carried out.Effects of structural parameters,such as structural rigidity,transverse connection,pier height and boundary condition,on structural dynamic property was studied.The result indicates that(1) cross-deck slab's rigidity can not be ignored owing to its more contribution to increase structural transverse and torsion rigidities;(2) structural transverse and longitudinal rigidities are relatively small than vertical and torsional rigidities;(3) structural vibration attenuation is normal,surface of bridge deck has a good flatness condition,and driving is comfortable;(4)structural rigidity,pier height and boundary condition are major factors to affect structure transverse and longitudinal vibration property,while traverse connection way has great effect on structural partial torsion vibration.
For evaluation of the dynamic property of the prestressed concrete continuous rigid-frame bridge,dynamic loading tests were made on Guizhou Bridge in Hubei Province,the vibration frequencies,modes,damping ratios and impact coefficients with different driving speeds and surface roughnesses of bridge deck were tested.Three space finite element calculation models based on different kinds assumptions were built.The vibration frequencies and modes of the bridge were calculated,and the comparative analysis between the calculation result and the test result was carried out.Effects of structural parameters,such as structural rigidity,transverse connection,pier height and boundary condition,on structural dynamic property was studied.The result indicates that(1) cross-deck slab's rigidity can not be ignored owing to its more contribution to increase structural transverse and torsion rigidities;(2) structural transverse and longitudinal rigidities are relatively small than vertical and torsional rigidities;(3) structural vibration attenuation is normal,surface of bridge deck has a good flatness condition,and driving is comfortable;(4)structural rigidity,pier height and boundary condition are major factors to affect structure transverse and longitudinal vibration property,while traverse connection way has great effect on structural partial torsion vibration.
引文
[1]邱峰.预应力混凝土斜拉桁架桥结构分析与设计研究[D].武汉:华中科技大学,2006.QIU Feng.Structure analysis and Design Research of PrestressedConcrete Chord-stayed Bridge[D].Wuhan:Huazhong Universi-ty of Science and Technology,2006.
[2]黄平明,王达,张永健.PC斜拉式桁架梁桥敏感参数分析[J].建筑科学与工程学报,2007,24(1):59-62.HUANG Pingming,WANG Da,ZHANG Yongjian.SensitivityParameters Analysis of PC Oblique-pulling Truss Bridge[J].Journal of Architecture and Civil Engineering,2007,24(1):59-62.
[3]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:自然科版,2006,26(6):39-43.WANG Da,HUANG Pingming,ZHANG Guangguo,et al.Dy-namic Characteristics of PC Cable Stayed Truss Bridge[J].Jour-nal of Chang’an University:Natural Science Edition,2006,26(6):39-43.
[4]张永健,黄平明,王达.节点刚域效应对斜拉式桁架桥的受力影响[J].长安大学学报:自然科版,2007,27(2):42-45.ZHANG Yongjian,HUANG Pingming,WANG Da.Influenceof Nodal Rigid Zone on Mechanics Characteristic of Oblique-pulling Truss Bridge[J].Journal of Chang’an University:Natural Science Edition,2007,27(2):42-45.
[5]金文成,周昌栋,邱峰,等.预应力混凝土斜拉桁架桥结构特点与结构型式[J].桥梁建设,2007(2):55-57.JIN Wencheng,ZHOU Changdong,QIU Feng,et al.Struc-tural Characteristics and Structural Types of Prestressed Con-crete Truss-Stayed Bridge[J].Bridge Construction,2007(2):55-57.
[6]金文成,邱峰.三峡库区秭归县卡子湾大桥设计与施工[J].世界桥梁,2006(4):20-23.JIN Wencheng,QIU Feng.Design and Construction of Kazi-wan Bridge,Zigui County in Three Gorges Reservoir Region[J].World Bridge,2006(4):20-23.
[7]宗周红,赖苍林,林友勤,等.大跨度预应力混凝土连续刚构桥的动力特性分析[J].地震工程与工程振动,2004,24(3):98-104.ZONG Zhouhong,LAI Canglin,LIN Youqin,et al.Analysisof Dynamic Characteristics of a Large-span Prestressed ConcreteContinuous Rigid Frame Bridge[J].Earthquake Engineeringand Engineering Vibration,2004,24(3):98-104.
[8]梁文中,颜全胜.珠江大桥动力特性测试与分析[J].广州建筑,2005(1):17-19.LIANG Wenzhong,YAN Quansheng.Ambient Vibration Mea-surements and Analysis of Dynamic Characteristics of Pearl Riv-er Bridge[J].Guangzhou Architecture,2005(1):17-19.
[9]彭大文,袁燕,江见虹.厦门海沧大桥西航道桥的动力特性[J].福州大学学报:自然科学版,1999,27(3):11-14.PENG Dawen,YUAN Yan,JIANG Jianhong.Dynamic Be-havior Analysis of Western Approach Bridge of Xiamen HaicangBridge[J].Journal of Fuzhou University:Natural ScienceEdtion,1999,27(3):11-14.
[10]宋雨,陈东霞.斜拉桥动力特性分析[J].厦门大学学报:自然科学版,2006,45(1):56-59.SONG Yu,CHEN Dongxia.Dynamic Property Analysis of Ca-ble-stayed Bridge[J].Journal of Xiamen University:Natu-ral Science Edition,2006,45(1):56-59.
[11]王泉清.G325九江大桥主桥斜拉桥模态试验分析[J].桥梁建设,2006(6):25-27.WANG Quanqing.Modal Test and Analysis of Cable-stayed Spansof Main Bridge of Jiujiang Bridge on National Road G325[J].Bridge Construction,2006(6):25-27.
[12]吴庆雄,陈宝春,高桥和雄,等.新西海桥的振动特性及舒适性评价研究[J].公路交通科技,2008,25(5):61-67.WU Qingxiong,CHEN Baochun,TAKAHASHI Kazuo,et al.Vehicle-bridge Dynamic Analysis and Riding Comfort Evaluation ofNew Saikai Bridge[J].Journal of Highway and TransportationResearch and Development,2008,25(5):61-67.
[13]王海城,施尚伟.桥梁冲击系数影响因素分析及偏差成因[J].重庆交通大学学报:自然科学版,2007,26(5):25-28.WANG Haicheng,SHI Shangwei.Analysis of Bridge ImpactCoefficient Influence Factor and the Deviation Formation[J].Journal of Chongqing Jiaotong University:Natural Science Edi-tion,2007,26(5):25-28.
[14]张新军,应磊东.超大跨度CFRP索斜拉桥的力学性能分析[J].公路交通科技,2008,25(10):74-78.ZHANG Xinjun,YING Leidong.Mechanical Properties of Su-per Long-span Cable-stayed Bridges Using CFRP Cables[J].Journal of Highway and Transportation Research and Develop-ment,2008,25(10):74-78.
[15]李岩,盛洪飞,陈彦江,等.强风环境下斜拉桥车桥系统动力响应分析研究[J].公路交通科技,2008,25(7):59-64.LI Yan,SHENG Hongfei.CHEN Yanjiang,et al.DynamicResponse Analysis of Vehicle-bridge System for Cable-stayedBridge in Strong Windy Environment[J].Journal of Highwayand Transportation Research and Development,2008,25(7):59-64.
[2]黄平明,王达,张永健.PC斜拉式桁架梁桥敏感参数分析[J].建筑科学与工程学报,2007,24(1):59-62.HUANG Pingming,WANG Da,ZHANG Yongjian.SensitivityParameters Analysis of PC Oblique-pulling Truss Bridge[J].Journal of Architecture and Civil Engineering,2007,24(1):59-62.
[3]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:自然科版,2006,26(6):39-43.WANG Da,HUANG Pingming,ZHANG Guangguo,et al.Dy-namic Characteristics of PC Cable Stayed Truss Bridge[J].Jour-nal of Chang’an University:Natural Science Edition,2006,26(6):39-43.
[4]张永健,黄平明,王达.节点刚域效应对斜拉式桁架桥的受力影响[J].长安大学学报:自然科版,2007,27(2):42-45.ZHANG Yongjian,HUANG Pingming,WANG Da.Influenceof Nodal Rigid Zone on Mechanics Characteristic of Oblique-pulling Truss Bridge[J].Journal of Chang’an University:Natural Science Edition,2007,27(2):42-45.
[5]金文成,周昌栋,邱峰,等.预应力混凝土斜拉桁架桥结构特点与结构型式[J].桥梁建设,2007(2):55-57.JIN Wencheng,ZHOU Changdong,QIU Feng,et al.Struc-tural Characteristics and Structural Types of Prestressed Con-crete Truss-Stayed Bridge[J].Bridge Construction,2007(2):55-57.
[6]金文成,邱峰.三峡库区秭归县卡子湾大桥设计与施工[J].世界桥梁,2006(4):20-23.JIN Wencheng,QIU Feng.Design and Construction of Kazi-wan Bridge,Zigui County in Three Gorges Reservoir Region[J].World Bridge,2006(4):20-23.
[7]宗周红,赖苍林,林友勤,等.大跨度预应力混凝土连续刚构桥的动力特性分析[J].地震工程与工程振动,2004,24(3):98-104.ZONG Zhouhong,LAI Canglin,LIN Youqin,et al.Analysisof Dynamic Characteristics of a Large-span Prestressed ConcreteContinuous Rigid Frame Bridge[J].Earthquake Engineeringand Engineering Vibration,2004,24(3):98-104.
[8]梁文中,颜全胜.珠江大桥动力特性测试与分析[J].广州建筑,2005(1):17-19.LIANG Wenzhong,YAN Quansheng.Ambient Vibration Mea-surements and Analysis of Dynamic Characteristics of Pearl Riv-er Bridge[J].Guangzhou Architecture,2005(1):17-19.
[9]彭大文,袁燕,江见虹.厦门海沧大桥西航道桥的动力特性[J].福州大学学报:自然科学版,1999,27(3):11-14.PENG Dawen,YUAN Yan,JIANG Jianhong.Dynamic Be-havior Analysis of Western Approach Bridge of Xiamen HaicangBridge[J].Journal of Fuzhou University:Natural ScienceEdtion,1999,27(3):11-14.
[10]宋雨,陈东霞.斜拉桥动力特性分析[J].厦门大学学报:自然科学版,2006,45(1):56-59.SONG Yu,CHEN Dongxia.Dynamic Property Analysis of Ca-ble-stayed Bridge[J].Journal of Xiamen University:Natu-ral Science Edition,2006,45(1):56-59.
[11]王泉清.G325九江大桥主桥斜拉桥模态试验分析[J].桥梁建设,2006(6):25-27.WANG Quanqing.Modal Test and Analysis of Cable-stayed Spansof Main Bridge of Jiujiang Bridge on National Road G325[J].Bridge Construction,2006(6):25-27.
[12]吴庆雄,陈宝春,高桥和雄,等.新西海桥的振动特性及舒适性评价研究[J].公路交通科技,2008,25(5):61-67.WU Qingxiong,CHEN Baochun,TAKAHASHI Kazuo,et al.Vehicle-bridge Dynamic Analysis and Riding Comfort Evaluation ofNew Saikai Bridge[J].Journal of Highway and TransportationResearch and Development,2008,25(5):61-67.
[13]王海城,施尚伟.桥梁冲击系数影响因素分析及偏差成因[J].重庆交通大学学报:自然科学版,2007,26(5):25-28.WANG Haicheng,SHI Shangwei.Analysis of Bridge ImpactCoefficient Influence Factor and the Deviation Formation[J].Journal of Chongqing Jiaotong University:Natural Science Edi-tion,2007,26(5):25-28.
[14]张新军,应磊东.超大跨度CFRP索斜拉桥的力学性能分析[J].公路交通科技,2008,25(10):74-78.ZHANG Xinjun,YING Leidong.Mechanical Properties of Su-per Long-span Cable-stayed Bridges Using CFRP Cables[J].Journal of Highway and Transportation Research and Develop-ment,2008,25(10):74-78.
[15]李岩,盛洪飞,陈彦江,等.强风环境下斜拉桥车桥系统动力响应分析研究[J].公路交通科技,2008,25(7):59-64.LI Yan,SHENG Hongfei.CHEN Yanjiang,et al.DynamicResponse Analysis of Vehicle-bridge System for Cable-stayedBridge in Strong Windy Environment[J].Journal of Highwayand Transportation Research and Development,2008,25(7):59-64.
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