不同桥梁数值模型车桥耦合对比分析
|
摘要
选取湖北省天门市境内一座跨径30m的简支T梁为试验对象,探讨车桥耦合振动的建模分析问题。首先,建立了三种不同有限元模型——梁格模型、壳-梁模型及实体模型。其次,结合现场试验,采用有限元模型修正方法,对以上三种有限元模型进行修正,同时基于有限元软件ANSYS中的参数化编程和瞬态分析功能,实现车桥耦合分析。最后,计算得到三种模型在移动荷载工况下的位移及应力时程,并与实测值对比。结果表明,实体模型的位移及应力时程与实测值吻合度最高,壳-梁模型次之,从而为车桥耦合数值分析提供了一种建模的思路。
Commercial general finite element software has been increasingly used in vehicle-bridge coupling analysis in recent years. This paper uses a simple supported T-beam with a span of 30 m as an engineering example. Firstly, three different finite element models are established: grillage, shell-beam, and solid. Second, combined with field tests, these three finite element models are modified using the finite element model updating method.Third, based on the parametric programming and transient analysis functions of ANSYS finite element software,vehicle-bridge coupling analysis is realized. Finally, the displacement and stress time histories of the three models under moving loads are calculated and compared with the measured values. The results show that the displacement and stress histories of the solid model most successfully agrees with the measured values, followed by the shell-beam model. Hence, this paper provides a method for the modeling and analysis of vehicle-bridge coupling.
Commercial general finite element software has been increasingly used in vehicle-bridge coupling analysis in recent years. This paper uses a simple supported T-beam with a span of 30 m as an engineering example. Firstly, three different finite element models are established: grillage, shell-beam, and solid. Second, combined with field tests, these three finite element models are modified using the finite element model updating method.Third, based on the parametric programming and transient analysis functions of ANSYS finite element software,vehicle-bridge coupling analysis is realized. Finally, the displacement and stress time histories of the three models under moving loads are calculated and compared with the measured values. The results show that the displacement and stress histories of the solid model most successfully agrees with the measured values, followed by the shell-beam model. Hence, this paper provides a method for the modeling and analysis of vehicle-bridge coupling.
引文
[1]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1992:301-323.
[2]宋一凡.公路桥梁动力学[M].北京:人民交通出版社,2000:74-94.
[3]邓露,段林利,何维,等.中国公路车-桥耦合振动车辆模型研究[J].中国公路学报,2018,31(7):92-100.
[4]韩万水,王涛,李永庆,等.基于模型修正梁格法的车桥耦合振动分析系统[J].中国公路学报,2011,24(5):47-55.
[5]李永庆.基于模型修正的梁格法车桥耦合振动程序开发和验证[D].长安大学,2010.
[6]Li Hongyi,Wekezer J,ASCEF,et al.Dynamic Response of a Highway Bridge Subjected to Moving Vehicles[J].Journal of Bridge Engineering,2008,13:439-448.
[7]Zou Qiling,Deng Lu,Guo Tieding,et al.Comparative Study of Different Numerical Models for Vehicle-Bridge InteractionAnalysis[J].International Journal of Structural Stability and Dynamics,2016,16(9):1636-1643.
[8]院素静.公路车-桥耦合典型车辆运动方程的建立及软件设计[D].西安:长安大学,2012.
[9]E·C·汉勃利.桥梁上部构造性能[M].郭文辉,译.北京:人民交通出版社,1982:72-79.
[10]夏樟华.基于静动力的桥梁结构有限元模型修正[D].福州:福州大学,2006.
[11]刘世忠,刘永健,程高,等.公路桥梁车桥耦合振动数值分析方法[J].郑州大学学报(工学版),2014,35(1):94-98.
[12]韩万水.重载交通动态过桥可视化仿真与安全评价[M].北京:人民交通出版社,2016:64-65.
[2]宋一凡.公路桥梁动力学[M].北京:人民交通出版社,2000:74-94.
[3]邓露,段林利,何维,等.中国公路车-桥耦合振动车辆模型研究[J].中国公路学报,2018,31(7):92-100.
[4]韩万水,王涛,李永庆,等.基于模型修正梁格法的车桥耦合振动分析系统[J].中国公路学报,2011,24(5):47-55.
[5]李永庆.基于模型修正的梁格法车桥耦合振动程序开发和验证[D].长安大学,2010.
[6]Li Hongyi,Wekezer J,ASCEF,et al.Dynamic Response of a Highway Bridge Subjected to Moving Vehicles[J].Journal of Bridge Engineering,2008,13:439-448.
[7]Zou Qiling,Deng Lu,Guo Tieding,et al.Comparative Study of Different Numerical Models for Vehicle-Bridge InteractionAnalysis[J].International Journal of Structural Stability and Dynamics,2016,16(9):1636-1643.
[8]院素静.公路车-桥耦合典型车辆运动方程的建立及软件设计[D].西安:长安大学,2012.
[9]E·C·汉勃利.桥梁上部构造性能[M].郭文辉,译.北京:人民交通出版社,1982:72-79.
[10]夏樟华.基于静动力的桥梁结构有限元模型修正[D].福州:福州大学,2006.
[11]刘世忠,刘永健,程高,等.公路桥梁车桥耦合振动数值分析方法[J].郑州大学学报(工学版),2014,35(1):94-98.
[12]韩万水.重载交通动态过桥可视化仿真与安全评价[M].北京:人民交通出版社,2016:64-65.