计算力学学报2024，Vol.41Issue(6)：1066-1071,6.DOI:10.7511/jslx20230629002
近似考虑剪切变形影响时薄壁箱梁畸变效应分析
Analysis on distortion effect of thin-walled box girders approximately considering shear deformation
摘要
Abstract
In order to study the influence of shear deformation on the distortion of thin-walled box girders,the shear force was considered in calculating the strain energy of a frame in analyzing distortion effect by applying a traditional energy variation method.The governed differential equation considering the shear deformation was established by applying the principle of minimum potential energy,and the initial parametric solution expressed in the form of a Krylov function was derived for box girders subjected to a uniformly distributed distortion moment load.A numerical example was given to analyze the influence of shear deformation on the distortion warping stress and the transverse bending moment,and verified by finite element software ANSYS.The results show that the distortion warping stress calculated by the proposed method is closer to the shell element solution of ANSYS than that by neglecting the shear deformation.After considering the shear deformation effect,the distortion warping stress increases by less than 1.85％,and the transverse bending moment increases by less than 2.35％.The height to span ratio of the thin-walled box girder has a significant effect on the distortion warping stress.关键词
薄壁箱梁/畸变效应/能量变分法/剪切变形/初参数解Key words
thin-walled box girder/distortion effect/energy variation method/shear deformation/initial parameter solution分类
交通工程引用本文复制引用
龙均翊,张元海,周福成..近似考虑剪切变形影响时薄壁箱梁畸变效应分析[J].计算力学学报,2024,41(6):1066-1071,6.基金项目
国家自然科学基金(52368020)资助项目. （52368020）
