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在火车—桥梁相互作用的早先的研究中,已经通过铰接桁架模型得到杆件轴力的冲击率,通过刚接桁架模型得到杆件轴力和弯矩的冲击率。本文的宗旨有三个方面;(a)研究能否通过横梁和纵梁端部的半刚性连接得到改进结果。(b)利用局部桥梁模型,研究冲击和承受疲劳的构件中内力和弯矩的大小。(c)利用局部桥梁模型来研究各种因素对冲击系数、各种构件的应力范围的影响以及桁架桥的连接的影响。简述了桥梁模型、车辆模型以及相应的运动方程,对各种桥梁模型得到的结果进行了比较。
In a previous study of train-bridge interaction, the impact rate of the shaft forces was obtained through a hinged-truss model, and the axial and bending moments of the rod were obtained from a rigid-truss model. The purpose of this article is threefold; (a) to investigate whether improved results are achieved through the semi-rigid connection of beams and the ends of stringers. (b) Using local bridge models, study the magnitude of internal forces and bending moments in impact and fatigue components. (c) The local bridge model is used to study the impact of various factors on the impact factor, the stress range of various components, and the effect of truss bridge connections. The bridge model, the vehicle model and the corresponding equations of motion are briefly introduced. The results obtained from various bridge models are compared.