水平载荷作用下双梁桥架内力分析

双梁桥式起重机桥架在水平平面为一框架结构,由于其超静定次数较高,作精确分析比较困难,而采用近似方法又会产生较大的误差,不宜用于工程设计。目前在作桥架设计时尚缺乏准确的实用公式。本文以框架结构为计算模型,对偏斜侧向载荷,集中载荷和均布载荷作用下的水平框架进行了内力分析,提出了精确的计算公式。

Internal Force Analysis of Double Girder Overhead Crane Bridge under the Action of Horizontal Loads

The bridge of double girder overhead crane is a frame structure in horizontal plane. Bccause this frame structure is highly statically indeterminatcone, it is difficult to analyse accurately the internal forces of the struct ure and the errcr of the results by approximate method is high. Up to now thereare not accurate fcrmulas available for this structure. In this paper the authors take the frame structurc as as,aralysis model and aralyse the internal forces of the structurc under hcrizontal lateral loads caused by deflected moving of the cranc, hcrizontal concentrated and uniformly distributed loads. The accurate formulas are given.