论文部分内容阅读
《建筑结构》1981年第5期李作骏同志的“普通及预应力钢筋混凝土薄腹梁,屋架的起拱问题”一文,指出当前一些标准图集及设计手册中,在“建筑起拱”上的错误作法和图面标注上的混乱。目前不少施工图仅在屋架几何尺寸图上标出示意性的起拱值,但全部杆件轴线长度却不考虑起拱。仍标注了结构计算简图的尺寸,施工时难以照图施工。笔者认为该文提出了屋架设计图上长期存在而又未被重视的一个问题。本文介绍屋架起拱的一般作法与计算。设计者在绘制屋架施工图中实现起拱,是屋架设计工作中的一环。以满足屋架跨中要求的“建筑起挟”值为前提,循着简化设计与制作的原则,可选择合理的起拱方案。以不考虑起拱的屋架结构计算简图作依据,仅调整其中局部几根杆件的轴线长
“Architecture”, Issue 5 of 1981, Comrade Li Zuojun’s “Ordinary and Prestressed Reinforced Concrete Thin-Bed-Girders, Arching Problems of Roof Trusses” article, pointed out that in some current standard atlases and design manuals, arches “The wrong practice and confusion on the surface of the map. At present, many construction drawings only indicate the schematic value of the arching on the truss geometry, but the length of the axis of all the members does not consider arching. The dimensions of the structural calculation sketch are still marked, and it is difficult to construct according to the drawings. The author believes that this paper proposes a long-standing problem that has not been taken seriously. This article describes the general practices and calculations for roof arching. The architects realize the arching in the drawing of the truss construction drawing, which is a part of the roof truss design work. In order to meet the ”building requirements" value required for the cross-cutting of roof framing, follow the principles of simplified design and production, and a reasonable arching alternative can be chosen. Based on the calculation of the sketch of the truss structure without considering the arch, only the axis length of some of the bars is adjusted.