高速列车作用下大跨度钢网架结构动力响应分析
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摘要
武广客运专线武汉火车站的站房采用了上部大跨度复杂钢结构与下部桥梁共同组成的"桥建合一"的新型结构形式,结构动力性能和稳定分析难度大。基于移动荷载列作用下简支梁动力响应计算的基本理论,采用ANSYS软件建立移动荷载列-桥梁的数值计算模型,得到桥梁支座处反力时程曲线及富氏谱,然后以此支座反力作为上部大跨度钢结构的输入荷载,计算上部大跨度钢结构的动力响应,确定结构的薄弱部位,根据结构的组成,分别给出结构各部分的最大等效应力云图及时程曲线。计算结果可为进一步分析结构的疲劳寿命提供基础,提出的研究思路可为国内今后"桥建合一"结构形式的动力响应分析提供参考。
The special passenger railway from Wuhan to Guangzhou is the longest special passenger railway in China,and also with the features of the highest technical standards and the largest investment scales.The Wuhan Railway Station adopted the structure form of combination of bridge and building,which is difficult to analyze its dynamic behavior and structural stability.Numerical calculation model for moving loads and bridge was established by the software ANSYS based on the basic theory of dynamic response of simple supported beam.The time history of bearing reactions and its Fourier spectrum were obtained.Then,dynamic responses of upper large-span latticed steel structure were calculated under the bearing reactions.The maximum equivalent Mises stresses contour and their time histories were presented according to different component of upper steel structure and weak parts were determined.The calculation results can provide foundation for fatigue analysis of weld nodes.And,the research approach can provide reference for similar structure dynamic analysis in future.
The special passenger railway from Wuhan to Guangzhou is the longest special passenger railway in China,and also with the features of the highest technical standards and the largest investment scales.The Wuhan Railway Station adopted the structure form of combination of bridge and building,which is difficult to analyze its dynamic behavior and structural stability.Numerical calculation model for moving loads and bridge was established by the software ANSYS based on the basic theory of dynamic response of simple supported beam.The time history of bearing reactions and its Fourier spectrum were obtained.Then,dynamic responses of upper large-span latticed steel structure were calculated under the bearing reactions.The maximum equivalent Mises stresses contour and their time histories were presented according to different component of upper steel structure and weak parts were determined.The calculation results can provide foundation for fatigue analysis of weld nodes.And,the research approach can provide reference for similar structure dynamic analysis in future.
引文
[1]王国波.站桥合一大跨度钢结构车致振动效应研究[R].武汉:武汉理工大学博士后出站报告,2009.
[2]YANG Y B,YAU J D,HSU L C.Vibration of simplebeams due to trains moving at high speeds[J].Engineering Structures,1997,19(11):936-944.
[3]YAU J D,YANG Y B,KUO S R.Impact response ofhigh speed rail bridges and riding comfort of rail cars[J].Engineering Structures,1999,21(21):836-844.
[4]夏禾,张楠,高日,等.铁路桥梁与高速列车的动力试验研究[J].工程力学,2007,24(9):166-172.
[5]张楠,夏禾.铁路桥梁在高速列车作用下的动力响应分析[J].工程力学,2005,22(3):144-151.
[6]沈锐利.高速铁路简支梁桥竖向振动响应研究[J].中国铁道科学,1996,17(3):24-34.
[7]冯青松,雷晓燕,练松良.不平顺条件下高速铁路轨道振动的解析研究[J].振动工程学报,2008,21(6):559-564.
[8]唐意,顾明,全涌.矩形截面超高层建筑风致脉动扭矩的数学模型[J].建筑结构学报,2009,30(5):198-204.
[9]赵鹏飞,郝成新,潘国华,等.南京站主站房地震模拟振动台试验研究[J].建筑结构学报,2005,26(1):71-76.
[10]苑宏宇,叶继红,沈世钊,等.单层球面网壳的最不利简单动荷载分析[J].建筑科学与工程学报,2007,24(2):13-18.
[11]赵鹏飞,潘国华,汤荣伟,等.武汉火车站复杂大型钢结构体系研究[J].建筑结构,2009,39(1):1-4.
[2]YANG Y B,YAU J D,HSU L C.Vibration of simplebeams due to trains moving at high speeds[J].Engineering Structures,1997,19(11):936-944.
[3]YAU J D,YANG Y B,KUO S R.Impact response ofhigh speed rail bridges and riding comfort of rail cars[J].Engineering Structures,1999,21(21):836-844.
[4]夏禾,张楠,高日,等.铁路桥梁与高速列车的动力试验研究[J].工程力学,2007,24(9):166-172.
[5]张楠,夏禾.铁路桥梁在高速列车作用下的动力响应分析[J].工程力学,2005,22(3):144-151.
[6]沈锐利.高速铁路简支梁桥竖向振动响应研究[J].中国铁道科学,1996,17(3):24-34.
[7]冯青松,雷晓燕,练松良.不平顺条件下高速铁路轨道振动的解析研究[J].振动工程学报,2008,21(6):559-564.
[8]唐意,顾明,全涌.矩形截面超高层建筑风致脉动扭矩的数学模型[J].建筑结构学报,2009,30(5):198-204.
[9]赵鹏飞,郝成新,潘国华,等.南京站主站房地震模拟振动台试验研究[J].建筑结构学报,2005,26(1):71-76.
[10]苑宏宇,叶继红,沈世钊,等.单层球面网壳的最不利简单动荷载分析[J].建筑科学与工程学报,2007,24(2):13-18.
[11]赵鹏飞,潘国华,汤荣伟,等.武汉火车站复杂大型钢结构体系研究[J].建筑结构,2009,39(1):1-4.
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