Engineering Transactions, 64, 4, pp. 509–516, 2016

Stability of an Imperfect Truss Loaded by Wind

Gdansk University of Technology

Gdansk University of Technology

The present paper is devoted to the numerical research of stability of a truss loaded by wind and stiffened by elastic supports situated only at the top chord a. The lateral braces, or lateral and torsional braces were taken into account. In the research the linear buckling analysis results for the beam and shell model were presented. Two different shapes of initial geometric imperfections were considered in the non-linear static analysis performed for the shell model of the structure. As a results the truss buckling and limit load was found related to the truss bracing stiffness and the threshold bracing condition was obtained necessary to provide maximum buckling resistance of the truss.
Keywords: elastic supports, buckling load, limit load
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PN-EN 1993-1-1 Eurocode 3 (2006): Design of steel structures. Part 1–1: General rules and rules for buildings.

Biegus A., Trapezoidal sheet as a bracing preventing flat trusses from out-of-plane buckling, Archives of Civil and Mechanical Engineering, 15(3): 735–741, 2014, doi: 10.1016/j.acme.2014.08.007.

Jankowska-Sandberg J., Kołodziej J., Experimental study of steel truss lateral-torsional buckling, Engineering Structures, 46: 165–172, 2013, doi: 10.1016/j.engstruct.2012.07.033.

Krajewski M., Iwicki P., Stability and load bearing capacity of a truss with elastic braces, Recent Advances in Computational Mechanics, CRC Press Balkema, Taylor & Francis, pp. 17–22, 2014.

Krajewski M., Iwicki P., Sensitivity analysis of critical load and load bearing capacity of a truss with elastic braces, XI Conference New Developments on Mechanics, electronic version, 2015.

PN-EN 1991-1-4 Eurocode 1 (2008): Actions on structures, Design of steel structures. Part 1–4: General actions – Wind actions.

Femap with Nastran N.X., Finite element modeling and post-processing. Version 10.1.1., Siemens Product Lifecycle Management Software Inc., 2009.

Autodesk Robot Structural Analysis Professional, Autodesk Inc., 2010.

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