Computational & Technology Resources
an online resource for computational,
engineering & technology publications
Civil-Comp Proceedings
ISSN 1759-3433
CCP: 108
Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping
Paper 37

Numerical Modeling of a Thin-Walled Profile with respect to the Redistribution of Bending Moments

J. Flodr1, M. Krejsa1, D. Mikolasek1, J. Brozovsky1 and P. Parenica2

1Department of Structural Mechanics, Faculty of Civil Engineering, VSB - Technical University of Ostrava, Czech Republic
2Department of Building Structures, Faculty of Civil Engineering, VSB - Technical University of Ostrava, Czech Republic

Full Bibliographic Reference for this paper
J. Flodr, M. Krejsa, D. Mikolasek, J. Brozovsky, P. Parenica, "Numerical Modeling of a Thin-Walled Profile with respect to the Redistribution of Bending Moments", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 37, 2015. doi:10.4203/ccp.108.37
Keywords: numerical modeling, verification, experiment, steel structure, thin-walled profile, frame corner, stress redistribution, finite element, ANSYS.

The paper deals with the detailed determination of the resistance of a diagonal steel member and its connections, which is the main supporting element of the steel halls system built from thin-walled cross-section profiles. For this type of structure the stability behavior of the structure from the global and local points of view must be emphasized. The paper is focused on solving the common beam model and its design using detailed numerical models, which aim to detect potential savings, but also the critical points in the design solution.

The global support system is analyzed in detail with a diagonal frame corner that is considered as a critical point in the structure. The aim of the analysis is to determine the rotational stiffness, which would be applied in a simple beam model. For a detailed analysis the finite element method is used and the commercial software ANSYS. Numerical modeling is based on the model of a selected frame, which is defined for verification as a beam model and follows a detailed analysis of the diagonal using solid elements with non-linear structural, material and geometrical non-linearity. The analysis verifies the behavior of the frame from the point of view of global stability. The ability the stress redistribution from diagonal to the other elements is monitored.

An integral part of the work, described in this paper, is also a physical test design, which is a necessary part of the verification of the numerical model of the corresponding diagonal joints. Given the complexity of the frame corner with the diagonal experimental specimens are made corresponding to the solved supporting element, but with modifications in the diagonal connections. In addition, for the physical test a corresponding numerical model is created that considers the previous solution. The knowledge gained from numerical analyses are applied in basic beam model for better definition in terms the real behavior of the diagonals.

purchase the full-text of this paper (price £20)

go to the previous paper
go to the next paper
return to the table of contents
return to the book description
purchase this book (price £75 +P&P)