GFRP-钢组合梁桥的荷载试验
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摘要
对国内首座GFRP-钢组合梁桥进行荷载试验,并将荷载试验的实测结果与理论计算结果进行了分析比较。对GFRP桥面板的局部变形进行测量,并与有限元计算值进行对比,分析了在车轮荷载作用下桥面板结构的变形情况与沥青混凝土铺装层的应变状态。结果表明各主梁变形实测值和理论值接近,由车轮荷载引起的铺装层表面拉应力小于沥青混凝土的抗拉极限强度,结构处于安全受力状态。分析结果可为GFRP-钢组合梁桥的设计和应用提供参考依据。
The load test on the first GFRP-steel composite girder bridge in China was implemented,the test result was compared with theoretical values.The local deformation of GFRP bridge deck was also measured,and the values were compared with the finite element calculations,then the deformation of bridge deck and the strain of asphalt concrete pavement under wheel loads were studied.The results show that the measured deformation of steel beams is close to the theoretical value,the tensile stress in the deck pavement caused by wheel load is less than the ultimate tensile strength of the asphalt concrete pavement,and the structure is in safe state.The analytical results could provide a reference for design and application of GFRP-steel composite girder bridges.
The load test on the first GFRP-steel composite girder bridge in China was implemented,the test result was compared with theoretical values.The local deformation of GFRP bridge deck was also measured,and the values were compared with the finite element calculations,then the deformation of bridge deck and the strain of asphalt concrete pavement under wheel loads were studied.The results show that the measured deformation of steel beams is close to the theoretical value,the tensile stress in the deck pavement caused by wheel load is less than the ultimate tensile strength of the asphalt concrete pavement,and the structure is in safe state.The analytical results could provide a reference for design and application of GFRP-steel composite girder bridges.
引文
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[2]ZHOU Aixi,COLEMAN J T,LESKO J J,et al.Structural Analysis of FRP Bridge Deck System fromAdhesively Bonded Pultrusions[C]//Proceedings of theInternational Conference on FRP Composites in CivilEngineering.Hong Kong:Elsevier Science Ltd,2001:1413-1420.
[3]BAKIS C E.Fiber-reinforced Polymer Composites forConstruction-state-of-the-Art Review[J].Journalof Composites for Construction,2002,6(2):73-87.
[4]万水,胡红,周荣星.FRP桥面板结构特点与实例[J].南京理工大学学报,2005,29(1):17-21.WAN Shui,HU Hong,ZHOU Rongxing.StructuralCharacteristics of FRP Bridge Decks and Its ApplicationInstance in Bridge Engineering[J].Journal of NanjingUniversity of Science and Technology,2005,29(1):17-21.
[5]宗周红,任伟新,郑振飞.既有桥梁承载能力评估方法[J].地震工程与工程振动,2005,25(5):147-152.ZONG Zhouhong,REN Weixin,ZHENG Zhenfei.Load-carrying Capacity Assessment Methods of Existing Bridges[J].Earthquake Engineering and Engineering Vibration,2005,25(5):147-152.
[6]张磊,张占军,黄卫,等.基于车轮-桥面接触耦合特性的铺装层受力分析方法[J].中国公路学报,2009,22(4):50-56.ZHANG Lei,ZHANG Zhanjun,HUANG Wei,et al.Mechanics Analysis Method for Deck Pavement Based onTire-deck Contact Coupling Characteristic[J].ChinaJournal of Highway and Transport,2009,22(4):50-56.
[7]钱振东,罗剑,敬淼淼.沥青混凝土钢桥面铺装方案受力分析[J].中国公路学报,2005,18(2):61-64.QIAN Zhendong,LUO Jian,JING Miaomiao.MechanicalAnalysis of Asphalt Concrete Paving Projects onSteel Bridge Deck[J].China Journal of Highway andTransport,2005,18(2):61-64.
[8]徐伟,李智,张肖宁.子模型法在大跨径斜拉桥桥面结构分析中的应用[J].土木工程学报,2004,37(6):30-34.XU Wei,LI Zhi,ZHANG Xiaoning.Application ofSubmodeling Method for Analysis for Deck Structure ofDiagonal Cable-stayed Bridge with Long Span[J].ChinaCivil Engineering Journal,2004,37(6):30-34.
[9]项海帆.高等桥梁结构理论[M].北京:人民交通出版社,2000.XIANG Haifan.Advanced Theory of Bridge Structure[M].Beijing:China Communications Press,2000.
[10]朱坤宁,万水,刘玉擎.FRP桥面板静载试验研究及分析[J].工程力学,2010,27(S1):240-244.ZHU Kunning,WAN Shui,LIU Yuqing.Analysis andExperimental Study on Statically Loaded FRP Bridge Deck[J].Engineering Mechanics,2010,27(S1):240-244.
[11]张剑,叶见曙,艾军,等.PC多梁式梁的横向受力非线性分析[J].哈尔滨工业大学学报,2010,42(12):1967-1971.ZHANG Jian,YE Jianshu,AI Jun,et al.NonlinearAnalysis on Mechanical Performance of PC Multi-girderStructures under Lateral Loading[J].Journal of HarbinInstitute of Technology,2010,42(12):1967-1971.
[12]朱坤宁,万水.复合材料桥面板截面参数分析与设计研究[J].玻璃钢/复合材料,2011(3):3-7.ZHU Kunning,WAN Shui.Analysis and Research onSection Parameter of FRP Bridge Panel[J].FiberReinforced Plastics/Composites,2011(3):3-7.
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