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前言 过去进行预紧螺栓联接强度计算不能避免试算,现提出一种简捷算法,可供设计者直接计算后查表求得结果,大大提高了设计工作效率。 本文蒙南京工学院杨可桢副教授指教,董哲同志校阅,特此致谢。 在较大载荷下的联接用螺栓一般都是公称直径大于6毫米的普通粗牙螺纹。(下文中长度单位均为毫米)。这种螺纹的危险截面面积A_s,目前按图1所示的最小截面形状,用如下公式计算:
Preface In the past, the prestressing bolt joint strength calculation can not avoid the trial calculation. A simple algorithm is proposed for the designer to directly calculate the look-up table to obtain the result and greatly improve the design work efficiency. In this paper, Nanjing Institute of Technology associate professor Yang Kezhen advice, Comrade Dong Zhe reviewed, hereby acknowledge. Bolts for bolting under heavier loads are generally normal coarse thread with a nominal diameter greater than 6 mm. (The unit of length below is millimeter). The dangerous cross-sectional area of this thread, A_s, is now calculated as the minimum cross-sectional shape shown in Figure 1 using the following formula: