Experimental and numerical investigation of thin-walled I-section beam under bending and torsion

The aim of the research - to investigate behavior thin-walled beam I-section loaded with bending and torsion using theoretical, numerical, experimental approaches. In this paper, main criteria for consideration different methods analysis is geometric characteristic section. results obtained by finite element method, numerical as well data are compared. method considering an additional degree freedom at a node include restrained dimension stiffness matrix thus 14×14. calculation according theory compared solution software, experiment. I-beam section subject considered. deformations, strain, stress distributions open structures subjected presented methods. comparative angle twisting, normal stresses in frame combined loading displayed graphically. To evaluate results, investigation under was carried out. As result comparison, it revealed that refined proposed authors have good convergence also quite close values commercial software.