东南大学学报（自然科学版）2024，Vol.54Issue(2)：423-431,9.DOI:10.3969/j.issn.1001-0505.2024.02.020
框架刚度计算方法对箱梁畸变效应分析的影响
Influence of calculation methods of frame stiffness on distortion effect analysis of box girders
摘要
Abstract
The influence of the frame stiffness calculated by the displacement method and force method on the analysis results of distortion effect of box girders was studied.Firstly,the analytical formulas of moment of in-ertial against distortion of box girders were derived by the displacement method and force method,respective-ly,and then distortion differential equations were established.Meanwhile,initial parametric solutions of the equations were provided when box girders were subjected simultaneously to eccentric uniform and concentrated loads.The distortion effects of a cantilever box girder model and a simply supported box girder example were studied by the two theoretical methods and finite element software.The results show that the distortion warping normal stresses,distortion transverse normal stresses and distortion angles of the box girders with rectangular section calculated by the two analytical methods are consistent,and they are in good agreement with the meas-ured values and finite element results.In addition,the distortion moments and distortion bi-moments of the box girders with trapezoidal section calculated by the two analytical methods are basically consistent,and they agree well with the finite element results.However,there is obvious difference in the distortion angles and transverse bending moments per unit width of the box girders with trapezoidal section calculated by the two methods,and the transverse bending moment per unit width calculated by the force method is closer to the fi-nite element result.With the increase of the inclination of webs,the distortional frame stiffnesses calculated by the two analytical methods and their difference increase,but the distortional warping stiffnesses decrease firstly and then increase.关键词
薄壁箱梁/位移法/力法/框架刚度/畸变效应Key words
thin-walled box girder/displacement method/force method/frame stiffness/distortion effect分类
交通工程引用本文复制引用
魏彦红,张元海,周福成,刘泽翔..框架刚度计算方法对箱梁畸变效应分析的影响[J].东南大学学报（自然科学版）,2024,54(2):423-431,9.基金项目
国家自然科学基金资助项目(52368020,51968040)、兰州交通大学基础研究拔尖人才计划资助项目(2022JC17). （52368020,51968040）
