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本文根据桥吊主梁在外载荷及自重作用下产生下挠和焊接引起的变形推导了主梁上拱曲线方程,它较现今使用的二次抛物线或正弦曲线的上拱曲线更为合理,更符合实际。
In this paper, according to the deformation induced by lower flexure and welding under the effect of external load and weight of the bridge girder, the curve equation of the arch of the main girder is deduced. It is more reasonable and more reasonable than the curve of the upper arch of the second parabola or sinusoid used today. actual.