郭文华, 曾庆元. 多跨简支曲线轨道折线梁桥空间振动分析模型[J]. 工程力学, 2003, 20(2): 1-6.
引用本文: 郭文华, 曾庆元. 多跨简支曲线轨道折线梁桥空间振动分析模型[J]. 工程力学, 2003, 20(2): 1-6.
GUO Wen-hua, ZENG Qing-yuan. AN ANALYTICAL MODEL FOR SPATIAL VIBRATION ANALYSIS OF SIMPLY-SUPPORTED MULTI-SPAN FOLDED GIRDER BRIDGES WITH CURVE TRACK[J]. Engineering Mechanics, 2003, 20(2): 1-6.
Citation: GUO Wen-hua, ZENG Qing-yuan. AN ANALYTICAL MODEL FOR SPATIAL VIBRATION ANALYSIS OF SIMPLY-SUPPORTED MULTI-SPAN FOLDED GIRDER BRIDGES WITH CURVE TRACK[J]. Engineering Mechanics, 2003, 20(2): 1-6.

多跨简支曲线轨道折线梁桥空间振动分析模型

AN ANALYTICAL MODEL FOR SPATIAL VIBRATION ANALYSIS OF SIMPLY-SUPPORTED MULTI-SPAN FOLDED GIRDER BRIDGES WITH CURVE TRACK

  • 摘要: 提出了一种多跨简支曲线轨道折线梁桥的空间振动分析模型,采用20自由度的梁段单元,可方便考虑T型梁横向与竖向弯曲、自由扭转、约束扭转等变形,选取正交流动坐标,建立了曲线轨道折线梁桥的动力特性矩阵,特别适用于曲线轨道折线梁桥与列车的空间振动分析.在实例研究中,计算了提速列车通过32m曲线轨道折线梁桥时的空间振动响应,并检算该桥是否具有足够的刚度及良好的运营平稳性,可供有关部门参考.

     

    Abstract: This paper presents an analytical model for spatial vibration analysis of the folded girder bridges with curve track. A beam segment element with 20 degrees of freedom is adopted to consider the flexural deformation, free torsion and restraint torsion of T-shaped beams. The orthogonal deformation coordinate system is selected to formulate the dynamic characteristic matrix of the folded girder bridges with curve track. The proposed model of the bridge is very suitable for spatial vibration analysis of both girder bridges with curve track and trains. In an given example the spatial vibration responses are calculated when the speed-increased train runs over the girder bridges of 32 meter span with curve track to test if the bridges have sufficient rigidity and the operation stability is fine.

     

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