著者

菅原 登 Noboru SUGAWARA

出版者

北見工業大学

雑誌

北見工業大学研究報告 (ISSN:03877035)

巻号頁・発行日

vol.2, no.2, pp.237-252, 1968-03

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As for the structure of bridges in these days, there is some tendency to use the plane-framed structures considering the torsional rigidity of their main beams with thinwall of a box section. However, there arise some cases of designing a skew plane-framed structure to be suitable for the conditions of the erection site. Formerly H. Homberg obtained ingeniously the solutions of the plane-framed structures using the group-load (Lastgruppen) method. In this study, this group-load method is applied to the analysis of a skew plane-framed structure considering the torsional rigidity of its main beams, and the influence lines of the bending moments as well as the torsional ones are obtained by a digital computer. The results are as follows : (1) This analysis indicates considerably smaller values of the bending moments than hose without the torsional rigidity. (2) The position of the maximum bending moment is not always at the midspan of main beams. It is affected by the skew angle, the panel length, the spacing of main beams, and other factors.