建筑钢结构进展2023，Vol.25Issue(12)：30-38,9.DOI:10.13969/j.cnki.cn31-1893.2023.12.004
基于板元框架法的钢底板波形钢腹板组合箱梁畸变效应分析
Analysis on Distortion Effect of Trapezoidal Composite Box Girders with Corrugated Steel Webs and Steel Bottom Plates Based on Plate Element Frame Method
摘要
Abstract
In order to analyze the distortion effect of trapezoidal composite box girder with corrugated steel webs and steel bottom plates,the restraint effect of top and bottom plates on corrugated steel webs is considered.Maintain the in-plane and out-of-plane bending stiffness unchanged when the composite box girder is equivalent to a steel box girder.Based on the plate element frame method,the distortion governing differential equation is set up based on plate element frame method and the general solution of Krylov function is derived.Combined with the comparative analysis of numerical examples,the rationality of this method is verified,and the influence of web depression angle and girder height on bi-moments is studied.The results demonstrate that it is more reasonable to consider the restraint effect of the top and bottom plates on the webs than to ignore the in-plane bending stiffness of the webs completely.As distortion warping stiffness and transverse frame stiffness of box girder is greatly weakened by corrugated steel web and steel bottom plate,the distortion warping stress of traditional corrugated steel web composite box girder can reach 1.98 times that of ordinary concrete box girder.And the distortion warping stress of corrugated steel web composite box girder with steel bottom plate can reach 15.31 times of that of traditional corrugated steel web composite box girder.The bi-moment near the mid-span section changes little with the web depression angle,and the bi-moment in other sections decreases gradually with the increase of the web depression angle.The distortion bi-moment increases slightly with the increase of girder height,and its maximum position changes.关键词
组合箱梁/畸变效应/等效截面/板元框架法/克雷洛夫函数Key words
composite box girder/distortion effect/equivalent section/plate element frame method/Krylov function分类
交通工程引用本文复制引用
陈东亮,张元海,刘泽翔..基于板元框架法的钢底板波形钢腹板组合箱梁畸变效应分析[J].建筑钢结构进展,2023,25(12):30-38,9.基金项目
国家自然科学基金(51968040) （51968040）
