钢管混凝土系杆拱桥损伤吊索系统内力重分布研究
|
摘要
以某下承式钢管混凝土系杆拱桥为背景,建立该桥的三维有限元模型,采用有效横截面积减小率模拟吊索损伤,通过仿真计算分析单根吊索和多根吊索发生不同程度损伤时,吊索系统静拉力重分布规律。结果表明,损伤吊索系统的静拉力重分布只在损伤吊索与其两侧相邻吊索间进行,多根吊索损伤引起吊索系统静拉力重分布近似等效于各单根损伤吊索引起静拉力重分布的线性叠加。该结论对于系杆拱桥吊索系统力学分析与评估具有较大的工程实用价值。
Against the background of a concrete-filled steel tube through tied arch bridge,the three-dimensional finite element model for the type of the bridge is established and the damages to the hangers of the bridge are simulated by means of the reduction ratio of effective cross section area.Through the simulation and calculation,the law of the static tensile force redistribution of the hanger system at the time the damages of different degrees occur in a single hanger and multiple hangers is analyzed.The results of the analysis show that the tensile force redistribution of the damaged hanger system only takes place in the damaged hanger and the adjacent hangers at both sides.The tensile force redistribution due to damages to the multiple hangers is approximately equivalent to the linear superimposition of the tensile force redistribution caused by the damage to each single hanger.The conclusions generalized herewith are of important engineering application value to the mechanical analysis and assessment of the hanger systems of other tied arch bridges.
Against the background of a concrete-filled steel tube through tied arch bridge,the three-dimensional finite element model for the type of the bridge is established and the damages to the hangers of the bridge are simulated by means of the reduction ratio of effective cross section area.Through the simulation and calculation,the law of the static tensile force redistribution of the hanger system at the time the damages of different degrees occur in a single hanger and multiple hangers is analyzed.The results of the analysis show that the tensile force redistribution of the damaged hanger system only takes place in the damaged hanger and the adjacent hangers at both sides.The tensile force redistribution due to damages to the multiple hangers is approximately equivalent to the linear superimposition of the tensile force redistribution caused by the damage to each single hanger.The conclusions generalized herewith are of important engineering application value to the mechanical analysis and assessment of the hanger systems of other tied arch bridges.
引文
[1]蔡晶,吴智深,李兆霞.静力载荷作用下结构参数识别及状态评估的统计分析[J].工程力学,2004,21(6):76-83.
[2]陈孝珍.基于静态测量数据的桥梁结构损伤识别研究(博士学位论文)[D].武汉:华中科技大学,2005.
[3]Yam L H,Li Y Y,Wong W O.Sensitivity Studies ofParameters for Damage Detection of Dlate-like Struc-tures Using Static and Dynamic Approaches[J].Engi-neering Structures,2002,24(11):1 465-1 475.
[4]Wang X,Hu N,Fukunaga H,et al.Structural DamageIdentification Using Static Test Data and Changes inFrequencies[J].Engineering Structures,2001,23(6):610-621.
[5]杜思义,殷学纲,陈淮.基于频率二阶摄动的结构损伤识别方法[J].应用力学学报,2006,23(4):613-618.
[6]杜思义,殷学纲,陈淮.中(下)承式拱桥吊索静张力分析方法的改进[J].世界地震工程,2006,22(4):99-103.
[7]杜思义,殷学纲,张卫民,等.基于摄动有限元方法对梁结构损伤的识别[J].世界地震工程,2006,22(2):115-119.
[8]殷学纲,姚建军.中承式拱桥吊索损伤对吊索系静张力的影响[J].中国公路学报,2004,17(1):45-48.
[2]陈孝珍.基于静态测量数据的桥梁结构损伤识别研究(博士学位论文)[D].武汉:华中科技大学,2005.
[3]Yam L H,Li Y Y,Wong W O.Sensitivity Studies ofParameters for Damage Detection of Dlate-like Struc-tures Using Static and Dynamic Approaches[J].Engi-neering Structures,2002,24(11):1 465-1 475.
[4]Wang X,Hu N,Fukunaga H,et al.Structural DamageIdentification Using Static Test Data and Changes inFrequencies[J].Engineering Structures,2001,23(6):610-621.
[5]杜思义,殷学纲,陈淮.基于频率二阶摄动的结构损伤识别方法[J].应用力学学报,2006,23(4):613-618.
[6]杜思义,殷学纲,陈淮.中(下)承式拱桥吊索静张力分析方法的改进[J].世界地震工程,2006,22(4):99-103.
[7]杜思义,殷学纲,张卫民,等.基于摄动有限元方法对梁结构损伤的识别[J].世界地震工程,2006,22(2):115-119.
[8]殷学纲,姚建军.中承式拱桥吊索损伤对吊索系静张力的影响[J].中国公路学报,2004,17(1):45-48.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心