一、引言豪式屋架虽系最古老的桁架形式之一,但由于其构造简单,制造方便,故在一些中小跨度的工业与民用结构中,仍多用之。桁架结构的杆件数目较多,其内力的求解,无论是用解析法或是图解法,均较繁琐,为弥补这一缺点,在很多结构静力计算手册中常附有计算表格备查。遗憾的是,在目前通用的手册中,所列的数据均较零散弧立,所提供的通式亦缺乏规律性,而且引用了一系列的换算符号,不便于理解,记忆困难;至于其篇幅之长——每种跨度(不同节间数)、每种坡度、每种荷载情况(上承或下承),均需单独配备 I. INTRODUCTION Wholly roof truss is one of the oldest truss forms, but due to its simple structure and easy manufacture, it is still used in some medium and small-span industrial and civil structures. Truss structure of the rod a large number of its internal force solution, whether analytical or graphical method, are more cumbersome, to make up for this shortcoming, in many structural static calculation manual often attached to the calculation form for reference. Regrettably, in the current manual, the data listed are more scattered and fragmented. The general formulas provided are also lack of regularity. Moreover, a series of conversion symbols are used, which are inconvenient to understand and have difficulty in memory. As for the length of the manual, The length of each span (different number of internals), each slope, each load (up or down), are required to be equipped with