【摘要】 本文以曲线薄壁梁的翘曲扭转理论和有限元方法为基础,对曲线格子梁理论,提出了考虑翘曲作用的计算方法。通过对一公路曲线箱形梁桥试验模型的计算,其结果与试验实测值比较吻合。作为实际应用,该方法对青岛一曲线斜支承格子箱形梁桥散了计算分析。全部计算分别由Wang VS2200和IBM 4331机上实现,文末列举了部分计算结果。该方法也适用于其它形式曲线桥梁的分析。更多还原

【Abstract】 This paper proposes an analytical method of curved grillage bridge theory in consideration of warping effect based on the warping-torsion theory of a curved thin-walled girder and on the finite element method.Experimental data of a curved box beam highway bridge as well as the theory of a curved thinwalled girder have been compared with the refined curved grillage theory developed herein.The resuIts are in good agreement.As a practical application, this method has been used to analyze a curved skew grillage box girder bridge in Qingdao, China. All of the calculations were performed on a Wang VS 2200 and an IBM4331 computer.Part of the results are listed at the end of this paper.The major advantage of the present method lies in the almost complete generality of application, (1)varying cross section can be handled assuming stepwise changes from element to element; (2) any support condition may berepresented, so that fixed supports, elastic columns and intermediate hinges may all be included, (3)curved, skew and irregular shapes may all be applied with comparative ease; (4)the system of equations needed to be solved is greatly reduced and the method is thus ideally suited for programming on small and medium size computers.更多还原