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桥跨结构物在承受列车纵向水平力时,事实上是一个静不定体系。作用于轨面上的列车纵向水平力,由轨道、桥台和桥墩共同承受。但在简支梁桥墩台设计中,一般均不考虑桥跨结构物的整体作用,而采用静定的办法决定桥墩台纵向水平力。国内外的试验证明,这种计算办法往往与实际不符。本文简要地介绍两种按全桥整体受力计算桥墩台纵向水平力的方法,并应用理论计算方法和实测资料进行对比计算。结果表明,理论计算方法在量值和规律方面都能与实测资料相吻合。最后对此问题研究方向提出了几点建议。
Bridge span structure in the horizontal train to withstand horizontal force, in fact, is a static system. Longitudinal horizontal force acting on the rail surface train, by the track, abutment and pier together to bear. However, in the design of simply supported beam pier, the overall effect of the bridge span structure is generally not taken into consideration, and the horizontal force of the bridge pier is determined by the statically determinate method. Experiments at home and abroad have proved that this method of calculation often does not correspond to reality. This paper briefly introduces two methods to calculate the horizontal force of bridge piers according to the total force of the whole bridge, and compares them with the theoretical calculation method and measured data. The results show that the theoretical calculation method can be consistent with the measured data both in magnitude and in the law. Finally, some suggestions on the research direction of this problem are put forward.