起重机主梁上拱度及预拱曲线

The camber of crave main girder and its pre-cambering curve

本文论述起重机主梁的上拱度及预拱曲线的基本原理,介绍了国内外起重机技术标准中规定的上拱度值。对主梁腹板下料提出了几种不同形式的预拱曲线,并说明了各种不同形式预拱曲线特点及各种不同起重机主梁腹板下料拱度曲线的选择。

This paper discusses the question of crane main girder camber and the pre-cambering curve, introducing camber values stipulated in related crane standards in China and abroad. Some different pre-eambering curves used in web cutting are presented and their features analysed, with further description of their use for different types of crane.