湖南大学学报（自然科学版）2024，Vol.51Issue(11)：167-176,10.DOI:10.16339/j.cnki.hdxbzkb.2024118
基于双参数地基Timoshenko梁的轻型桥台弯曲分析
Flexural Analysis of Light Abutment Based on Timoshenko Beam on Two-Parameter Foundation
摘要
Abstract
The Timoshenko beam model on a two-parameter foundation is presented for the flexural analysis of light type abutment in its self-plane.Its degenerating formulations and adaptability are discussed briefly.Based on the initial parameter solutions to the differential equation,the transfer matrix method is established for the Timoshenko beam on the two-parameter foundation.Based on the interpolation functions of the Timoshenko beam element,the finite element formulation of the Timoshenko beam on the two-parameter foundation is achieved.Numerical example results demonstrate that there are two phenomena found with the maximal moment position located on and deviating from the symmetrical center.Spatial finite element analyses of ANSYS are carried out and verify the phenomena.The variation laws of deformations and internal forces of the abutment in its self-plane are investigated along the tread width and non-uniformity of foundation.Given that the maximal moment position in the self-plane of light abutment deviates from the symmetrical center,the quantity is greater than that of the symmetrical center,and the moment at the symmetrical center is a local minimum,the current simplified method and design process with the center moment as the maximal result are suggested to be abandoned in many bridge engineering literature.The relevant theories need to be improved and refined.The unevenness of the foundation affects the deformations and inner forces in light abutment.The simple operation adopting the relevant parameters of the softest or the hardest foundations fails to achieve the maximum results,which is not safe for design practices.关键词
轻型桥台/弯曲分析/双参数地基/Timoshenko梁/剪切变形Key words
light type abutment/flexural analysis/two-parameter foundation/Timoshenko beam/shear deformation分类
交通工程引用本文复制引用
夏桂云,刘洪..基于双参数地基Timoshenko梁的轻型桥台弯曲分析[J].湖南大学学报（自然科学版）,2024,51(11):167-176,10.基金项目
国家自然科学基金资助项目(51278072),National Natural Science Foundation of China(51278072) （51278072）
湖南省教育厅重点项目(22A0223),Key Project of Education Department of Hunan Province(22A0223) （22A0223）
