蒲山系杆拱桥吊杆张拉力的空间计算分析
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摘要
以蒲山大桥为工程实例,采用有限元软件MIDAS/Civil建立了该下承式钢管混凝土拱桥的空间有限元计算模型,考虑拱桥吊杆在空间上的相互影响,给出了根据吊杆的张拉顺序利用逆序法计算拱桥吊杆第1次张拉时的初始张拉力,用影响矩阵法计算拱桥吊杆第2次、第3次张拉时的张拉力计算方法,得出了拱桥吊杆的初始张拉力按此结果进行吊杆张拉施工,吊杆内力整体上符合设计要求,所得结果可用于指导该拱桥吊杆的张拉施工,并可为同类桥梁的施工提供参考。
The finite element program MIDAS/Civil was used to establish the spatial finite element calculating models of the Pushan CFST(concrete filled steel tube) through arch bridge respectively.Interactive effect of suspenders of the arch bridge in space was considered.According to the stretching sequence of suspenders,the negative sequence method was introduced to calculate initial tensile force while stretching suspenders of the bridge for the first time.And the effect matrix method was introduced to the process of calculating initial tensile force for the second and the third times,initial tensile force of suspenders of the arch bridge was figured out.The tension construction of suspenders was done in according to the calculating results,the internal force of suspenders was done in accord with the design requirements.The calculating results can be used to guide construction of suspender stretching in this arch bridge.The method presented is feasible,and can offer reference to the construction of similar bridges.
The finite element program MIDAS/Civil was used to establish the spatial finite element calculating models of the Pushan CFST(concrete filled steel tube) through arch bridge respectively.Interactive effect of suspenders of the arch bridge in space was considered.According to the stretching sequence of suspenders,the negative sequence method was introduced to calculate initial tensile force while stretching suspenders of the bridge for the first time.And the effect matrix method was introduced to the process of calculating initial tensile force for the second and the third times,initial tensile force of suspenders of the arch bridge was figured out.The tension construction of suspenders was done in according to the calculating results,the internal force of suspenders was done in accord with the design requirements.The calculating results can be used to guide construction of suspender stretching in this arch bridge.The method presented is feasible,and can offer reference to the construction of similar bridges.
引文
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[8]刘亚平.钢筋混凝土系杆拱桥吊杆张拉计算及控制的研究[J].中国港湾建设,2002,(4):5-8.LIU Ya-ping.Calculation and control of tensions in sus-penders for reinforced concrete tied-arch bridge[J].ChinaHarbor Engineering Construction,2002,(4):5-8.
[9]张维国,贾乃波,刘祥高,等.再谈系杆拱桥吊杆初始张拉力的计算方法[J].水利水电科技进展,2002,22(3):26-28.ZHANG Wei-guo,JIA Nai-bo,LIU Xiang-gao,et al.Anoth-er discussion on computational method for analysis of rod ini-tial tension of tie bar arch bridge[J].Advances in Scienceand Technology of Water Resources,2002,22(3):26-28.
[10]陈宝春.钢管混凝土拱桥[M].北京:人民交通出版社,2007:482-484.CHEN Bao-chun.Concrete filled steel arch bridges[M].Beijing:China Communications Press,2007:482-484.
[2]虞建成,邵容光.确定P.C系杆拱桥吊杆初始张拉力方法及施工控制[J].公路,1998(9):23-26.YU Jian-cheng,SHAO Rong-guang.Determine P.C Prelimi-nary tension and construction control of tied arch’s suspensionrod[J].Highway,1998(9):23-26.
[3]虞建成,邵容光,王小林.系杆拱桥吊杆初始张拉力及施工控制[J].东南大学学报,1998,28(3):112-116.YU Jian-cheng,SHAO Rong-guang,WANG Xiao-lin.Pre-liminary tension and construction control of tied arch’s sus-pension rod[J].Journal of Southeast University,1998,28(3):112-116.
[4]杜思义,殷学纲,陈淮.中(下)承式拱桥吊杆静张力分析方法的改进[J].世界地震工程,2006,22(4):99-103.DU Si-yi,YIN Xue-gang,CHEN Huai.Static stress analysison suspenders of half-through or through arch bridges basedon improved FEM[J].World Earthquake Engineering,2006,22(4):99-103.
[5]彭宣茂.系杆拱桥吊杆初始张拉力的计算方法[J].水利水电科技进展,2000,20(6):32-33.PENG Xuan-mao.Computational method for analysis of rodinitial tension of bowstring arch bridges[J].Advances in Sci-ence and Technology of Water Resources,2000,20(6):32-33.
[6]贺栓海.桥梁结构理论与计算方法[M].北京:人民交通出版社,2003.HE Shuan-hai.The theory of bridges′structure and themethod of computation[M].Beijing:China CommunicationsPress,2003.
[7]肖汝诚,项海帆.斜拉桥索力优化及其工程应用[J].计算力学学报,1998,15(1):118-126.XIAO Ru-cheng,XIANG Hai-fan.Optimization method ofcable prestresses of cable-stayed bridge and its engineeringapplication[J].Chinese Journal of Computation Mechanics,1998,15(1):118-126.
[8]刘亚平.钢筋混凝土系杆拱桥吊杆张拉计算及控制的研究[J].中国港湾建设,2002,(4):5-8.LIU Ya-ping.Calculation and control of tensions in sus-penders for reinforced concrete tied-arch bridge[J].ChinaHarbor Engineering Construction,2002,(4):5-8.
[9]张维国,贾乃波,刘祥高,等.再谈系杆拱桥吊杆初始张拉力的计算方法[J].水利水电科技进展,2002,22(3):26-28.ZHANG Wei-guo,JIA Nai-bo,LIU Xiang-gao,et al.Anoth-er discussion on computational method for analysis of rod ini-tial tension of tie bar arch bridge[J].Advances in Scienceand Technology of Water Resources,2002,22(3):26-28.
[10]陈宝春.钢管混凝土拱桥[M].北京:人民交通出版社,2007:482-484.CHEN Bao-chun.Concrete filled steel arch bridges[M].Beijing:China Communications Press,2007:482-484.
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