矩形钢管混凝土组合桁梁连续刚构桥实桥试验
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摘要
为了研究矩形钢管混凝土组合桁梁桥这种主梁由矩形钢管混凝土桁架和混凝土桥面板组成的新桥型的力学性能,以中国首座矩形钢管混凝土组合桁梁桥为对象开展了实桥试验。试验桥孔跨布置为24m+40m+24m,结构体系为连续刚构。试验采用400kN加载卡车3辆,共进行了3个荷载工况12个加载步的加载,对试验桥的整体力学性能、矩形钢管混凝土杆件力学性能以及桥面板有效宽度进行了研究。试验结果表明:在荷载效率为1.90~3.05的超载工况下各控制杆件的轴力-应变及荷载-位移实测数据线性关系显著,试验桥在加载过程中始终处于良好的弹性工作状态;实测受压钢管混凝土下弦杆钢管与管内混凝土荷载的分配符合二者的轴向抗压刚度比例关系;由于矩形钢管混凝土管壁内设置了纵向PBL加劲肋(开孔钢板加劲肋),其在开孔区域形成混凝土榫,大幅提高了矩形钢管混凝土杆件的抗拉刚度,使其可达受压杆件刚度的80%;两主桁之间桥面板实测有效宽度与既有文献研究结果符合良好,且剪力滞效应在节点处比节间处表现得更为明显。
The main girder of the rectangular concrete-filled steel tubular(CFST)composite truss bridge consists of a rectangular CFST truss and concrete deck.To investigate the mechanical behavior of this new bridge type,field tests were performed on the first rectangular CFST composite truss bridge in China.The span arrangement of the testing bridge was(24+40+24)m,and the structural type of bridge was a continuous rigid system.3 trucks of weight 400 kN were used as the loading vehicles,and 3 test conditions with 12 loading steps were deployed.The whole mechanical behavior of the bridge,the rectangular CFST members,and the effective width of concrete deck were investigated.The test results show that the tested data of the axial forcestrain for the controlled members and the load displacement had significant linear relationships under overloading conditions with the load efficiency ratio ranging from 1.90-3.05;the testing bridge remained well within the elastic stage during the entire loading process.The measured load distribution between the in-filled concrete and steel tube for the compressing CFST member in the lower chord is similar to the relationship of the axial compression stiffness ratio.The longitudinal perfobond leister stiffeners(PBL stiffeners)were arranged in the steel tube of the CFST members,subsequently the concrete tenon was formed at the perfobond area and this could greatly increase the axial tensile stiffness of the rectangular CFST member to 80% of the compression member's stiffness.The tested effective width of the concrete deck between the chords coincides well with the value presented in the existing literatures.The shear lag in the concrete slab is more obvious on the truss joint compared to that at the midsection of the segment.
The main girder of the rectangular concrete-filled steel tubular(CFST)composite truss bridge consists of a rectangular CFST truss and concrete deck.To investigate the mechanical behavior of this new bridge type,field tests were performed on the first rectangular CFST composite truss bridge in China.The span arrangement of the testing bridge was(24+40+24)m,and the structural type of bridge was a continuous rigid system.3 trucks of weight 400 kN were used as the loading vehicles,and 3 test conditions with 12 loading steps were deployed.The whole mechanical behavior of the bridge,the rectangular CFST members,and the effective width of concrete deck were investigated.The test results show that the tested data of the axial forcestrain for the controlled members and the load displacement had significant linear relationships under overloading conditions with the load efficiency ratio ranging from 1.90-3.05;the testing bridge remained well within the elastic stage during the entire loading process.The measured load distribution between the in-filled concrete and steel tube for the compressing CFST member in the lower chord is similar to the relationship of the axial compression stiffness ratio.The longitudinal perfobond leister stiffeners(PBL stiffeners)were arranged in the steel tube of the CFST members,subsequently the concrete tenon was formed at the perfobond area and this could greatly increase the axial tensile stiffness of the rectangular CFST member to 80% of the compression member's stiffness.The tested effective width of the concrete deck between the chords coincides well with the value presented in the existing literatures.The shear lag in the concrete slab is more obvious on the truss joint compared to that at the midsection of the segment.
引文
[1]刘永健.矩形钢管混凝土桁架节点极限承载力试验与设计方法研究[D].长沙:湖南大学,2003.LIU Yong-jian.Experiments on Ultimate Bearing Capacity and Research on Design Method of Joints of Concrete-filled Rectangular Steel Tube Truss[D].Changsha:Hunan University,2003.
[2]陈宝春,牟廷敏,陈宜言,等.我国钢-混凝土组合结构桥梁研究进展及工程应用[J].建筑结构学报,2013,34(增1):1-10.CHEN Bao-chun,MU Ting-min,CHEN Yi-yan,et al.State-of-the-art of Research and Engineering Application of Steel-concrete Composite Bridges in China[J].Journal of Building Structures,2013,34(S1):1-10.
[3]MATO F M,CORNEJO M O,SNCHEZ R A E.Viaduct over Ulla River in the Atlantic High Speed Railway Line:A Composite(Steel-concrete)Truss World Record[J].Hormigón y Acero,2015,277(66):1-25.
[4]刘永健,姜磊,张宁.钢管混凝土中钢管的纵向容许应力[J].建筑科学与工程学报,2015,32(6):1-7.LIU Yong-jian,JIANG Lei,ZHANG Ning.Longitudinal Allowable Stress of Steel Tube in Concretefilled Steel Tube[J].Journal of Architecture and Civil Engineering,2015,32(6):1-7.
[5]姜磊,刘永健,侯蓓蓓.钢管混凝土拱肋轴力-应变关系[J].中国公路学报,2016,29(11):90-98.JIANG Lei,LIU Yong-jian,HOU Bei-bei.Axial Force-strain Relationship of Concrete-filled Steel Tube Arch Rib[J].China Journal of Highway and Transport,2016,29(11):90-98.
[6]HAN L,YAO G.Influence of Concrete Compaction on the Strength of Concrete-filled Steel RHS Columns[J].Journal of Constructional Steel Research,2003,59(6):751-767.
[7]HAN L,HE S,LIAO F.Performance and Calculations of Concrete Filled Steel Tubes(CFST)Under Axial Tension[J].Journal of Constructional Steel Research,2011,67(11):1699-1709.
[8]刘永健,刘君平,张俊光.主管内填混凝土矩形和圆形钢管桁架受弯性能对比试验研究[J].建筑结构学报,2010,31(4):86-93.LIU Yong-jian,LIU Jun-ping,ZHANG Jun-guang.Experimental Research on RHS and CHS Truss with Concrete Filled Chord[J].Journal of Building Structures,2010,31(4):86-93
[9]刘永健,刘君平,杨根杰,等.主管内填充混凝土矩形钢管桁架受力性能试验研究[J].建筑结构学报,2009,30(6):107-112.LIU Yong-jian,LIU Jun-ping,YANG Gen-jie,et al.Experimental Research on Mechanical Behavior of RHS Trusses with Concrete-filled in Chord[J].Journal of Building Structures,2009,30(6):107-112.
[10]刘君平,刘永健.主管内填充混凝土对矩形钢管桁架抗弯刚度影响研究[J].建筑结构学报,2009(增2):202-207.LIU Jun-ping,LIU Yong-jian.Research on Influence of Chord Concrete-inside on Overall Stiffness of Rectangular Hollow Section Steel Tube Truss Girder[J].Journal of Building Structures,2009(S2):202-207.
[11]刘永健,李运喜,刘君平,等.受压弦管填充混凝土的矩形钢管桁架静力性能分析[J].建筑科学与工程学报,2008,25(4):65-72.LIU Yong-jian,LI Yun-xi,LIU Jun-ping,et al.Static Behavior Analysis of RHS Trusses with Concrete-filled Compression Chord Member[J].Journal of Architecture and Civil Engineering,2008,25(4):65-72.
[12]高诣民,刘永健,姜磊,等.PBL加劲型矩形钢管混凝土桁架受弯性能试验[J].建筑科学与工程学报,2017,34(5):171-180.GAO Yi-min,LIU Yong-jian,JIANG Lei,et al.Experimental Research on Flexural Behaviour of Rectangular Concrete Filled Steel Tubular Truss Stiffened with PBL[J].Journal of Architecture and Civil Engineering,2017,34(5):171-180.
[13]VARMA A H,RICLES J M,SAUSE R,et al.Seismic Behavior and Modeling of High-strength Composite Concrete-filled Steel Tube(CFT)Beam-columns[J].Journal of Constructional Steel Research,2002,58(5/6/7/8):725-758.
[14]HAN L,WU X,HE S,et al.Flexural Behaviour of Concrete Filled Steel Tubular(CFST)Chord to Hollow Tubular Brace Truss:Experiments[J].Journal of Constructional Steel Research,2015,109:137-151.
[15]陈宝春,黄文金.圆管截面桁梁极限承载力试验研究[J].建筑结构学报,2007,28(3):31-36.CHEN Bao-chun,HUANG Wen-jin.Experimental Research on Ultimate Load Carrying Capacity of Truss Girders Made with Circular Tubes[J].Journal of Building Structures,2007,28(3):31-36.
[16]黄文金,陈宝春.钢管混凝土桁梁受弯试验研究[J].建筑科学与工程学报,2006,23(1):29-33.HUANG Wen-jin,CHEN Bao-chun.Experimental Research on Concrete Filled Steel Tube Truss Girder Under Bending[J].Journal of Architecture and Civil Engineering,2006,23(1):29-33.
[17]黄文金,陈宝春.腹杆形式对钢管混凝土桁梁受力性能影响的研究[J].建筑结构学报,2009,30(1):55-61.HUANG Wen-jin,CHEN Bao-chun.Research on Influence of Web Member on Mechanical Behavior of CFST Truss Girders[J].Journal of Building Structures,2009,30(1):55-61.
[18]FENG R,CHEN Y,GAO S,et al.Numerical Investigation of Concrete-filled Multi-planar CHS Inverse-triangular Tubular Truss[J].Thin-walled Structures,2015,94:23-37.
[19]CHEN Y,FENG R,GAO S.Experimental Study of Concrete-filled Multiplanar Circular Hollow Section Tubular Trusses[J].Thin-walled Structures,2015,94:199-213.
[20]彭桂瀚,周武,范碧琨,等.钢管混凝土组合桁梁受力性能有限元分析[C]//中国土木工程学会桥梁及结构工程分会.第二十届全国桥梁学术会议论文集.北京:人民交通出版社,2012:373-379.PENG Gui-han,ZHOU Wu,FAN Bi-kun,et al.Finite Element Analysis of CFST Truss Girders[C]//Branch of Bridge and Structural Engineering,China Civil Engineering Society.Proceedings of 20th National Bridge Academic Conference.Beijing:China Communications Press,2012:373-379.
[21]HU B,WANG J.Experimental Investigation and Analysis on Flexural Behavior of CFSTTC Beams[J].Thin-walled Structures,2017,116:277-290.
[22]HOU C,HAN L,MU T,et al.Analytical Behavior of CFST Chord to CHS Brace Truss Under Flexural Loading[J].Journal of Constructional Steel Research,2017,134:66-79.
[23]刘彬,刘永健,周绪红,等.中等跨径装配式矩形钢管混凝土组合桁梁桥设计[J].交通运输工程学报,2017,17(4):20-31.LIU Bin,LIU Yong-jian,ZHOU Xu-hong,et al.Design of Medium Span Prefabricated RCFST Composite Truss Bridge[J].Journal of Traffic and Transportation Engineering,2017,17(4):20-31.
[24]LIU Y,XIONG Z,LUO Y,et al.Double-composite Rectangular Truss Bridge and Its Joint Analysis[J].Journal of Traffic and Transportation Engineering:English Edition,2015,2(4):249-257.
[25]LIU Y,XIONG Z,FENG Y,et al.Concrete-filled Rectangular Hollow Section X Joint with Perfobond Leister Rib Structural Performance Study:Ultimate and Fatigue Experimental Investigation[J].Steel and Composite Structures,2017,4(24):455-465.
[26]JTG/T J21-01—2015,公路桥梁荷载试验规程[S].JTG/T J21-01—2015,Load Test Methods for Highway Bridge[S].
[27]刘永健,张宁,张俊光.PBL加劲型矩形钢管混凝土的力学性能[J].建筑科学与工程学报,2012,29(4):13-17.LIU Yong-jian,ZHANG Ning,ZHANG Jun-guang.Mechanical Behavior of Concrete-filled Square Steel Tube Stiffened with PBL[J].Journal of Architecture and Civil Engineering,2012,29(4):13-17.
[28]周绪红,刘永健,姜磊,等.PBL加劲型矩形钢管混凝土结构力学性能研究综述[J].中国公路学报,2017,30(11):45-62.ZHOU Xu-hong,LIU Yong-jian,JIANG Lei,et al.Review on Mechanical Behavior Research of Concrete Filled Rectangular Hollow Section Tube Stiffened with PBL[J].China Journal of Highway and Transport,2017,30(11):45-62.
[29]罗亚林.矩形钢管混凝土组合桁梁桥设计方法研究[D].西安:长安大学,2015.LUO Ya-lin.Design Method Study of Composite Trussed Bridge with Concrete-filled Rectangular Steel Tube[D].Xi’an:Chang’an University,2015.
[2]陈宝春,牟廷敏,陈宜言,等.我国钢-混凝土组合结构桥梁研究进展及工程应用[J].建筑结构学报,2013,34(增1):1-10.CHEN Bao-chun,MU Ting-min,CHEN Yi-yan,et al.State-of-the-art of Research and Engineering Application of Steel-concrete Composite Bridges in China[J].Journal of Building Structures,2013,34(S1):1-10.
[3]MATO F M,CORNEJO M O,SNCHEZ R A E.Viaduct over Ulla River in the Atlantic High Speed Railway Line:A Composite(Steel-concrete)Truss World Record[J].Hormigón y Acero,2015,277(66):1-25.
[4]刘永健,姜磊,张宁.钢管混凝土中钢管的纵向容许应力[J].建筑科学与工程学报,2015,32(6):1-7.LIU Yong-jian,JIANG Lei,ZHANG Ning.Longitudinal Allowable Stress of Steel Tube in Concretefilled Steel Tube[J].Journal of Architecture and Civil Engineering,2015,32(6):1-7.
[5]姜磊,刘永健,侯蓓蓓.钢管混凝土拱肋轴力-应变关系[J].中国公路学报,2016,29(11):90-98.JIANG Lei,LIU Yong-jian,HOU Bei-bei.Axial Force-strain Relationship of Concrete-filled Steel Tube Arch Rib[J].China Journal of Highway and Transport,2016,29(11):90-98.
[6]HAN L,YAO G.Influence of Concrete Compaction on the Strength of Concrete-filled Steel RHS Columns[J].Journal of Constructional Steel Research,2003,59(6):751-767.
[7]HAN L,HE S,LIAO F.Performance and Calculations of Concrete Filled Steel Tubes(CFST)Under Axial Tension[J].Journal of Constructional Steel Research,2011,67(11):1699-1709.
[8]刘永健,刘君平,张俊光.主管内填混凝土矩形和圆形钢管桁架受弯性能对比试验研究[J].建筑结构学报,2010,31(4):86-93.LIU Yong-jian,LIU Jun-ping,ZHANG Jun-guang.Experimental Research on RHS and CHS Truss with Concrete Filled Chord[J].Journal of Building Structures,2010,31(4):86-93
[9]刘永健,刘君平,杨根杰,等.主管内填充混凝土矩形钢管桁架受力性能试验研究[J].建筑结构学报,2009,30(6):107-112.LIU Yong-jian,LIU Jun-ping,YANG Gen-jie,et al.Experimental Research on Mechanical Behavior of RHS Trusses with Concrete-filled in Chord[J].Journal of Building Structures,2009,30(6):107-112.
[10]刘君平,刘永健.主管内填充混凝土对矩形钢管桁架抗弯刚度影响研究[J].建筑结构学报,2009(增2):202-207.LIU Jun-ping,LIU Yong-jian.Research on Influence of Chord Concrete-inside on Overall Stiffness of Rectangular Hollow Section Steel Tube Truss Girder[J].Journal of Building Structures,2009(S2):202-207.
[11]刘永健,李运喜,刘君平,等.受压弦管填充混凝土的矩形钢管桁架静力性能分析[J].建筑科学与工程学报,2008,25(4):65-72.LIU Yong-jian,LI Yun-xi,LIU Jun-ping,et al.Static Behavior Analysis of RHS Trusses with Concrete-filled Compression Chord Member[J].Journal of Architecture and Civil Engineering,2008,25(4):65-72.
[12]高诣民,刘永健,姜磊,等.PBL加劲型矩形钢管混凝土桁架受弯性能试验[J].建筑科学与工程学报,2017,34(5):171-180.GAO Yi-min,LIU Yong-jian,JIANG Lei,et al.Experimental Research on Flexural Behaviour of Rectangular Concrete Filled Steel Tubular Truss Stiffened with PBL[J].Journal of Architecture and Civil Engineering,2017,34(5):171-180.
[13]VARMA A H,RICLES J M,SAUSE R,et al.Seismic Behavior and Modeling of High-strength Composite Concrete-filled Steel Tube(CFT)Beam-columns[J].Journal of Constructional Steel Research,2002,58(5/6/7/8):725-758.
[14]HAN L,WU X,HE S,et al.Flexural Behaviour of Concrete Filled Steel Tubular(CFST)Chord to Hollow Tubular Brace Truss:Experiments[J].Journal of Constructional Steel Research,2015,109:137-151.
[15]陈宝春,黄文金.圆管截面桁梁极限承载力试验研究[J].建筑结构学报,2007,28(3):31-36.CHEN Bao-chun,HUANG Wen-jin.Experimental Research on Ultimate Load Carrying Capacity of Truss Girders Made with Circular Tubes[J].Journal of Building Structures,2007,28(3):31-36.
[16]黄文金,陈宝春.钢管混凝土桁梁受弯试验研究[J].建筑科学与工程学报,2006,23(1):29-33.HUANG Wen-jin,CHEN Bao-chun.Experimental Research on Concrete Filled Steel Tube Truss Girder Under Bending[J].Journal of Architecture and Civil Engineering,2006,23(1):29-33.
[17]黄文金,陈宝春.腹杆形式对钢管混凝土桁梁受力性能影响的研究[J].建筑结构学报,2009,30(1):55-61.HUANG Wen-jin,CHEN Bao-chun.Research on Influence of Web Member on Mechanical Behavior of CFST Truss Girders[J].Journal of Building Structures,2009,30(1):55-61.
[18]FENG R,CHEN Y,GAO S,et al.Numerical Investigation of Concrete-filled Multi-planar CHS Inverse-triangular Tubular Truss[J].Thin-walled Structures,2015,94:23-37.
[19]CHEN Y,FENG R,GAO S.Experimental Study of Concrete-filled Multiplanar Circular Hollow Section Tubular Trusses[J].Thin-walled Structures,2015,94:199-213.
[20]彭桂瀚,周武,范碧琨,等.钢管混凝土组合桁梁受力性能有限元分析[C]//中国土木工程学会桥梁及结构工程分会.第二十届全国桥梁学术会议论文集.北京:人民交通出版社,2012:373-379.PENG Gui-han,ZHOU Wu,FAN Bi-kun,et al.Finite Element Analysis of CFST Truss Girders[C]//Branch of Bridge and Structural Engineering,China Civil Engineering Society.Proceedings of 20th National Bridge Academic Conference.Beijing:China Communications Press,2012:373-379.
[21]HU B,WANG J.Experimental Investigation and Analysis on Flexural Behavior of CFSTTC Beams[J].Thin-walled Structures,2017,116:277-290.
[22]HOU C,HAN L,MU T,et al.Analytical Behavior of CFST Chord to CHS Brace Truss Under Flexural Loading[J].Journal of Constructional Steel Research,2017,134:66-79.
[23]刘彬,刘永健,周绪红,等.中等跨径装配式矩形钢管混凝土组合桁梁桥设计[J].交通运输工程学报,2017,17(4):20-31.LIU Bin,LIU Yong-jian,ZHOU Xu-hong,et al.Design of Medium Span Prefabricated RCFST Composite Truss Bridge[J].Journal of Traffic and Transportation Engineering,2017,17(4):20-31.
[24]LIU Y,XIONG Z,LUO Y,et al.Double-composite Rectangular Truss Bridge and Its Joint Analysis[J].Journal of Traffic and Transportation Engineering:English Edition,2015,2(4):249-257.
[25]LIU Y,XIONG Z,FENG Y,et al.Concrete-filled Rectangular Hollow Section X Joint with Perfobond Leister Rib Structural Performance Study:Ultimate and Fatigue Experimental Investigation[J].Steel and Composite Structures,2017,4(24):455-465.
[26]JTG/T J21-01—2015,公路桥梁荷载试验规程[S].JTG/T J21-01—2015,Load Test Methods for Highway Bridge[S].
[27]刘永健,张宁,张俊光.PBL加劲型矩形钢管混凝土的力学性能[J].建筑科学与工程学报,2012,29(4):13-17.LIU Yong-jian,ZHANG Ning,ZHANG Jun-guang.Mechanical Behavior of Concrete-filled Square Steel Tube Stiffened with PBL[J].Journal of Architecture and Civil Engineering,2012,29(4):13-17.
[28]周绪红,刘永健,姜磊,等.PBL加劲型矩形钢管混凝土结构力学性能研究综述[J].中国公路学报,2017,30(11):45-62.ZHOU Xu-hong,LIU Yong-jian,JIANG Lei,et al.Review on Mechanical Behavior Research of Concrete Filled Rectangular Hollow Section Tube Stiffened with PBL[J].China Journal of Highway and Transport,2017,30(11):45-62.
[29]罗亚林.矩形钢管混凝土组合桁梁桥设计方法研究[D].西安:长安大学,2015.LUO Ya-lin.Design Method Study of Composite Trussed Bridge with Concrete-filled Rectangular Steel Tube[D].Xi’an:Chang’an University,2015.