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C.G. Chiorean¹, L. Imre¹ and R.A.M. Silveira²

¹Department of Structural Mechanics, Technical University of Cluj-Napoca, Cluj-Napoca, Romania
²Dept. of Civil Engineering School of Mines, Federal University of Ouro Preto, Ouro Preto, MG, Brazil

doi:10.4203/ccc.9.7.1

C.G. Chiorean, L. Imre, R.A.M. Silveira, "A Strain-Driven Moment-Curvature Analysis of Composite Cross-Sections Exposed to Fire", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 9, Paper 7.1, 2024, doi:10.4203/ccc.9.7.1

Keywords: fire analysis, moment-curvature analysis, composite-cross-section, biaxial bending, strain-softening, nonlinear analysis.

Abstract

This paper presents a novel strain-driven incremental-iterative procedure for moment-curvature analysis of composite steel concrete cross-sections of arbitrary shape exposed to fire. The equilibrium equations are expressed in terms of prescribed axial force and bending moment ratio, while the inelastic behaviour and the solution are controlled at the fibre level, enhancing the global convergence properties of the entire process. The distinctive features of the strain-driven approach outlined here include its ability to accurately capture all critical points on the complete moment-curvature diagrams and eliminate the need for specialized load-path numerical strategies to address singular points associated with ultimate strength capacity. The validation process involves comparisons with other numerical results and experimental data from international literature, extending also the benchmark results used for strength capacity assessment and moment-curvature diagrams of composite cross-sections exposed to high temperatures.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 9 PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: P. Iványi, J. Kruis and B.H.V. Topping Paper 7.1 A Strain-Driven Moment-Curvature Analysis of Composite Cross-Sections Exposed to Fire C.G. Chiorean¹, L. Imre¹ and R.A.M. Silveira² ¹Department of Structural Mechanics, Technical University of Cluj-Napoca, Cluj-Napoca, Romania ²Dept. of Civil Engineering School of Mines, Federal University of Ouro Preto, Ouro Preto, MG, Brazil doi:10.4203/ccc.9.7.1 Full Bibliographic Reference for this paper C.G. Chiorean, L. Imre, R.A.M. Silveira, "A Strain-Driven Moment-Curvature Analysis of Composite Cross-Sections Exposed to Fire", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 9, Paper 7.1, 2024, doi:10.4203/ccc.9.7.1 Keywords: fire analysis, moment-curvature analysis, composite-cross-section, biaxial bending, strain-softening, nonlinear analysis. Abstract This paper presents a novel strain-driven incremental-iterative procedure for moment-curvature analysis of composite steel concrete cross-sections of arbitrary shape exposed to fire. The equilibrium equations are expressed in terms of prescribed axial force and bending moment ratio, while the inelastic behaviour and the solution are controlled at the fibre level, enhancing the global convergence properties of the entire process. The distinctive features of the strain-driven approach outlined here include its ability to accurately capture all critical points on the complete moment-curvature diagrams and eliminate the need for specialized load-path numerical strategies to address singular points associated with ultimate strength capacity. The validation process involves comparisons with other numerical results and experimental data from international literature, extending also the benchmark results used for strength capacity assessment and moment-curvature diagrams of composite cross-sections exposed to high temperatures. download the full-text of this paper (PDF, 14 pages, 1360 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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