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曲线弯梁桥振动理论分析
引用本文:单德山,李乔.曲线弯梁桥振动理论分析[J].公路交通科技,2005,22(5):71-74.
作者姓名:单德山  李乔
作者单位:西南交通大学土木工程学院桥梁及结构工程系,四川,成都,610031
摘    要:利用广义坐标法和能量原理推导曲线梁桥的振动控制微分方程,解释曲线梁桥振动理论与直线梁振动理论的异同点,在推导质量矩阵的显式表达式过程中考虑截面扭转中心与截面形心的不一致。随后给出了曲线梁动力分析的有限元方法,并完成了相应电算程序的编制。最后通过实例分析并验证本文所提计算理论和计算方法的正确性。

关 键 词:曲线梁  动力特性  有限元  能量法
文章编号:1002-0268(2005)05-0071-04
修稿时间:2004年3月10日

Analysis of Dynamic Theory for Curved-Girder BriDges
SHAN De-shan,LI Qiao.Analysis of Dynamic Theory for Curved-Girder BriDges[J].Journal of Highway and Transportation Research and Development,2005,22(5):71-74.
Authors:SHAN De-shan  LI Qiao
Abstract:The dynamic behavior of the curved girder bridge was studied in this paper.The dynamic control equations of curved girder bridges were deduced by using the General Coordinate Method and Energy Theory;and the similarities and differences between the vibration of curved-girder bridges and straight girder bridges were obtained from their dynamic control equations.Then the explicit mass matrix of the curved girder bridge was deduced by using Hamilton Theory.During the deduction the non-coincidence of the section's torsional center and the gravity center are taken into account.Furthermore the dynamic finite element method of the curved girder bridges was developed.Based on the dynamic theory of curved girder bridges,the dynamic analysis software was compiled and the dynamic theory and computational method are verified by a real example curved-girder bridge.
Keywords:Curved-girder  Dynamic property  Finite element method  Energy theory  
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