Strength Analysis of Single-Symmetry Ratio for Single-Symmetry I-Beam
- 18 October 2021
- journal article
- Published by Trans Tech Publications, Ltd. in Materials Science Forum
- Vol. 1047, 202-206
- https://doi.org/10.4028/www.scientific.net/msf.1047.202
Abstract
Double-symmetry I-beams are the most common beam cross-sections in structural building. Because that is simpler to design and analyze steel profiles than single-symmetry I-beams. However, with the advancement of economy, the improvement of the quality of life and the cultural standards, large-scale emergence of various large span bridges, special bridge-type landscapes and viaducts. Single symmetrical I-section is better than Double-symmetry I-section to fairly in line with demand characteristics and material economy. This study chooses different Iyc/Iy ratio sections, 0.229, 0.23, 0.3 and 0.5. Iyc/Iy =0.23 is the change point of the sudden drop of the strength of the compressed airfoil. In study, the section is divided into three sections of plasticity, inelasticity and elasticity for analysis and comparison. Considering the different section sizes. If the value of Lb for a small non-elastic interval is too large, the section with a smaller cross-section will reach the elastic interval. Taking all section conditions Lb into consideration, taking 1.4m as a section will reach the non-elastic interval, if the value of the longer Lb is too small, the section with the larger section does not reach the elastic interval. In study, 10m is taken as the section to reach the elastic interval, orientation the AISC ( 2017 ) specification is used to analyze the I-beam. Symmetrical wing plate cross-sections were increased and reduced. The strength of the cross-sections between the compressed side and the tensioned side was discussed, and a single-symmetric I-section with the best cross-sectional efficiency was proposed.Keywords
This publication has 7 references indexed in Scilit:
- Variational Iteration Method for Transverse Vibrations of the Elastic, Tensioned BeamInternational Journal of Materials, Mechanics and Manufacturing, 2017
- Bending strength of singly-symmetric overhanging floor I-beamsHBRC Journal, 2015
- Lateral–torsional buckling assessment of steel beams through a stiffness reduction methodJournal of Constructional Steel Research, 2015
- On Design Method of Lateral-torsional Buckling of Beams: State of the Art and a New Proposal for a General Type Design MethodPeriodica Polytechnica Civil Engineering, 2015
- Experimental study of steel truss lateral–torsional bucklingEngineering Structures, 2013
- New design curves for lateral–torsional buckling—Proposal based on a consistent derivationJournal of Constructional Steel Research, 2010
- On the evaluation of elastic critical moments in doubly and singly symmetric I-section cantileversJournal of Constructional Steel Research, 2006