Resistance of steel I-sections under axial force and biaxial bending |
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| Affiliation: | 1. Traffic Engineering College, Research Institute of Structural Engineering and Disaster Reduction, Shenyang Jianzhu University, No. 25, Hunnan Middle Road, Shenyang 110168, China;2. Traffic Engineering College, Shenyang Jianzhu University, No. 25, Hunnan Middle Road, Shenyang 110168, China;3. Department of Civil Engineering, Osaka City University, 3-3-138 Sugimoto Sumiyoshi-ku, Osaka 558-8585, Japan;4. Civil Engineering College, Research Institute of Structural Engineering and Disaster Reduction, Shenyang Jianzhu University, No. 25, Hunnan Middle Road, Shenyang 110168, China;1. Department of Civil Engineering, Indian Institute of Engineering Science and Technology, Shibpur Howrah 711 103, India;2. Department of Aerospace Engineering and Applied Mechanics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, India;1. RISCO, School of Technology and Management, Polytechnic Institute of Leiria, Portugal;2. CONSTRUCT-LESE, Faculty of Engineering (FEUP), University of Porto, Portugal;3. CONSTRUCT-LESE, Superior School of Technology and Management of Polytechnic Institute of Viana do Castelo, Portugal;1. Research Scholar, Department of Civil Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India;2. Research Scholar, Department of Aerospace Engineering and Applied Mechanics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India;3. Professor, Department of Aerospace Engineering and Applied Mechanics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India |
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| Abstract: | The plastic criteria for the verification of steel cross-sections resistance are usually based on some basic hypotheses such as the development of plastic hinges, which depend on the interaction between the internal forces and the cross-section shape; therefore, specific equations are required for each type of cross-section.This paper presents new alternative interaction criteria for the analysis of steel I-sections subjected to an axial force and biaxial bending moments, at the elastic or the plastic limit states (as long as buckling phenomena are not involved).The plastic interaction criteria are presented, in a first step, for some particular combinations of the internal forces, such as axial loading with bending about a main axis, and biaxial bending without axial loading. In these cases, they are given by exact equations (within the frame of the hypotheses adopted in this study). All these plastic interaction criteria are compared with the corresponding plastic criteria adopted in the Eurocode 3 (EC3).Afterwards, a simplified global criterion is proposed for the simultaneous combination of an axial force and bending moments about both the main axes of inertia. This new simplified plastic criterion and the corresponding plastic criterion adopted in the EC3 are compared with the exact solution, obtained by a mixed numerical and analytical integration procedure. This comparison shows that this simplified criterion usually leads to results closer to the exact solutions. Some suggestions are then presented to improve the results given by the EC3. |
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