Imperfection sensitivity of thin plates loaded in shear
Keywords:plate buckling, worst initial imperfections, longitudinal stiffeners, GMNIA, sensitivity analysis
The paper deals with imperfection sensitivity analysis of longitudinally stiffened thin plates loaded in shear. The aim of this paper is to demonstrate the use of optimization method for direct determination of the worst imperfection shape. New linear constraints are considered in optimization method in order to find not only the worst but also realistic imperfection shape. Further on, different solutions of arbitrary shapes that are used to estimate the worst imperfection are introduced and compared. Finally, a parametric analysis seeking the worst imperfection shape is performed and discussed.
KRISTANI?, N., Limit State Design Using Exact Sensitivity Analysis and Shape Optimization, PhD Thesis, University of Ljubljana, Faculty of civil and geodetic engineering, Ljubljana, 2008.
KRISTANI?, Niko, KORELC, Jože, Optimization method for the determination of the most unfavorable imperfection of structures, Comput. Mech., 42, 6, pp. 859–872, 2008.
*** CEN, Eurocode 3: Design of steel structures. Part 1–5: Plated structural elements (EN 1993-1-5), European Committee for Standardisation, Brussels, 2006.
BEG, D., KUHLMANN, U., DAVAINE, L., BRAUN, B., Design of Plated Structures. Eurocode
: Design of Steel Structures. Part 1–5: Design of Plated Structures, 1st edition, European Convention for Constructional Steelwork, Berlin, Ernst & Sohn, Brussels, 2010.
JOHANSSON, B., MAQUOI, R., SEDLACEK, G., MÜLLER, C., BEG, D., Commentary and worked examples to EN 1993-1-5 Plated structural elements, 1st edition, Office for Official Publications of the European Communities, Joint Research Centre European Commission, Luxembourg, 2007.
KORELC, J. AceFEM, Mathematica finite element environment, University of Ljubljana, Faculty of Civil and Geodetic Engineering, Ljubljana, 2010.
KUHLMANN, U., BEG, D., ZIZZA, A., SINUR, F., REJEC, K., Tragverhalten von Blechen mit Längssteifen unter Interaktion von Biegemoment und Querkraft (in German), Research Report, Universität, Institut für Konstruktion und Entwurf, Stuttgart, 2012.
Copyright (c) 2020 The Romanian Journal of Technical Sciences. Applied Mechanics.
This work is licensed under a Creative Commons Attribution 4.0 International License.