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预应力混凝土箱梁桥施工过程中底板崩裂破坏机理分析

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Keywords: 桥梁工程,预应力混凝土箱梁,仿真分析,施工过程,破坏,材料非线性

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Abstract:

?针对悬臂施工预应力混凝土箱梁合龙过程中底板崩裂问题,对其破坏机理和防治措施进行了研究。以某预应力混凝土连续箱梁桥为例,对其施工过程进行模拟,通过考虑材料非线性对底板开裂的过程进行仿真分析,并对底板崩裂的机理进行分析,在此基础上根据规范提出防治措施供设计应用。结果表明:由于合龙束孔道的影响,孔肋为受力最不利区域,在径向力作用下,孔肋的斜裂缝和撕裂裂缝是导致箱梁破坏的主要原因;在今后箱梁设计中,底板横向除应满足抗剪承载力外,孔肋尚需满足最小孔道间距的要求。

References

[1]  CHATELAIN J,GODART B,DUCHENE J L.Detection,Diagnosis, and Monitoring of Cracked Prestressed Concrete Bridges[C]//NOWAD A S.Proceedings of the NATO Advanced Research Workshop on Bridge Evaluation,Repair and Rehabilitation.Dordrecht:Kluwer Academic Publishers,1990:145-159.
[2]  黎增丰,涂常卫,钟伟坚,等.潭州大桥箱梁底板砼开裂事故处理[J].中南公路工程,1997,22(4):35-39,40.
[3]  何 海.变高度预应力混凝土箱梁桥底板纵向裂缝成因分析及防治[J].中南公路工程,2001,26(3):61-62.
[4]  魏乐永,沈旭东,肖汝诚,等.预应力混凝土连续箱梁底板崩裂破坏的机理及其对策[J].结构工程师,2007,23(2):53-57.
[5]  彭元诚.连续刚构箱梁底板崩裂原因分析与对策[J].桥梁建设,2008(3):67-70,78.
[6]  浙江大学,浙江省公路管理局.预应力混凝土连续箱梁底板开裂原因分析及防治研究报告[R].杭州:浙江大学,2009.
[7]  邵旭东,程翔云,李立峰.桥梁设计与计算[M].北京:人民交通出版社,2007.
[8]  HOGNESTAD E,HONSON N W,MCHENRY D.Concrete Stress Distribution in Ultimate Strength Design[J].ACI Journal Proceedings,1955,52(12):455-480.
[9]  JTG D62—2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].
[10]  徐有邻,程志军,杨建军,等.混凝土筒芯楼板受剪承载力试验研究[C]//同济大学.全国现浇混凝土空心楼盖结构技术交流会论文集.上海:中国工程建设标准化协会混凝土结构专业委员会,2005:106-112.
[11]  PODOLNY W J.The Cause of Cracking in Post Tensioned Concrete Box Girder Bridges and Retrofit Procedures[J].PCI Journal,1985,30(2):82-139.
[12]  MOON D Y,SIM J,OH H.Practical Crack Control During the Construction of Precast Segmental Box Girder Bridges[J].Computers & Structures,2005,83(31/32):2584-2593.
[13]  LI Zeng-feng,TU Chang-wei,ZHONG Wei-jian,et al.The Management of Cracking at the Bottom Slab of Tanzhou Bridge[J].Central South Highway Engineering,1997,22(4):35-39,40.
[14]  HE Hai.Longitudinal Crack Cause Analysis and Prevention Measures of Box Girder Bridge with Varying Depths[J].Central South Highway Engineering,2001,26(3):61-62.
[15]  WEI Le-yong,SHEN Xu-dong,XIAO Ru-cheng,et al.Mechanism and Prevention Countermeasures of Cracking for Bottom Slab in a Continuous Prestressed Concrete Box Girder[J].Structural Engineers,2007,23(2):53-57.
[16]  PENG Yuan-cheng.Cause Analysis and Countermeasures for Bursting Cracks in Box Girder Bottom Slabs of Continuous Rigid-frame Bridges[J].Bridge Construction,2008(3):67-70,78.
[17]  Zhejiang University,Highway Administration of Zhejiang Province.Cracking Mechanism and Prevention Methods for Bottom Slab Crack of Prestressed Concrete Box Bridge[R].Hangzhou:Zhejiang University,2009.
[18]  SHAO Xu-dong,CHENG Xiang-yun,LI Li-feng.Bridge Design & Computation[M].Beijing:China Communications Press,2007.
[19]  AL-MANASEER A A,PHILLIPS D V.Numerical Study of Some Post-cracking Material Parameters Affecting Nonlinear Solutions in RC Deep Beams[J].Canadian Journal of Civil Engineering,1987,14(5):655-666.
[20]  JTG D62—2004,Code for Design of Highway Re-inforced Concrete and Prestressed Concrete Bridges and Culverts[S].
[21]  XU You-lin,CHENG Zhi-jun,YANG Jian-jun,et al.Experimental Study on Shear Capacity of Concrete Circular Hollow Floor[C]//Tongji University.National Symposium on Cast-in-place Hollow Concrete Floor System.Shanghai:Professional Committee of Concrete Structure of China Engineering Construction Standardized Association,2005:106-112.

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