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本文论证了同时考虑弯曲变形与轴力变形计算拱桥弹性压缩内力方法与一般先算不计弹性压缩内力和再只考虑弹性压缩内力然后相加的方法之间的一致性。同时通过理论分析、比较和数例提出弹性压缩内力应以恒载弹性压缩弯矩为主要考虑对象,从而论证了《桥规》规定的合理性,并提出了可以变动的幅度。
This paper demonstrates the consistency between the method of calculating the elastic compression internal force of an arch bridge by considering both the bending deformation and the axial force deformation, and the method of calculating the internal force of elastic compression and then adding the elastic force to the compression force. At the same time, by theoretical analysis, comparison and numerical examples, it is proposed that the elastic compression internal moment should take the elastic compression moment as the main consideration, which proves the rationality of the “bridge gauge” regulation and puts forward the range that it can be changed.