Stiffness Matrix of Thin-Walled Open Bar Subject to Bending, Bending Torsion and Shift of Cross Section Middle Surface

International Conference on Construction, Architecture and Technosphere Safety 2017

土木建筑工程

Panasenko, N.N.^1 ; Sinelschikov, A.V.^2

Engineering and Technology of Land Transport, Astrakhan State Technical University, Tatischeva St., 16, Astrakhan

414056, Russia^1

Industrial and Civil Construction, Astrakhan State University of Civil Engineering, Tatischeva St., 18, Astrakhan

414056, Russia^2

关键词: 3D structures;    Bar deformation;    Bending-torsion;    Engineering constructions;    Exact solution;    Fundamental frequencies;    Software suite;    Tangential stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/262/1/012044/pdf
DOI  :  10.1088/1757-899X/262/1/012044

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

One of the main stages in the analysis of complex 3D structures and engineering constructions made of thin-walled open bars using FEM is a stiffness matrix developing. Taking into account middle surface shear deformation caused by the work of tangential stresses in the formula to calculate a potential energy of thin-walled open bars, the authors obtain an important correction at calculation of the bar deformation and fundamental frequencies. The results of the analysis of the free end buckling of a cantilever H-bar under plane bending differ from exact solution by 0.53%. In the course of comparison of the obtained results with the cantilever bar buckling regardless the middle surface shear deformation, an increase made 16.6%. The stiffness matrix of a thin-walled open bar developed in the present work can be integrated into any software suite using FEM for the analysis of complex 3-D structures and engineering constructions with n-freedoms.