这次参加《钢结构设计手册》的编写过程中,遇到钢屋架上弦局部弯矩的取值问题,我们做了一点理论分析工作,提出了建议取值,现将分析结果说明如下: 前言随着建材工业轻质材料的生产,轻质而又有一定强度的屋面防水材料广泛采用,国内外应用轻型钢结构屋架也日益增多。由于屋面瓦材轻,规格尺寸不大,如石棉水泥波形瓦,钢丝网水泥波形瓦,玻璃钢及瓦楞形铁波形瓦等屋面,使屋架多采用拎体系,其拎距一般在 During the preparation of the “Steel Structure Design Manual”, we encountered the problem of the value of the local bending moment of the steel truss roof winding. We did some theoretical analysis and put forward the proposed value. Now the analysis results are explained as follows: With the production of lightweight materials for the building materials industry, light waterproof roofing materials with a certain degree of strength are widely used, and light steel roof trusses are increasingly used at home and abroad. Due to the lightness of the roofing tiles and the small size, such as the asbestos-cement tile, the corrugated wire mesh tile, the glass fiber reinforced plastic and corrugated iron tile, etc.