Vol. 4, No. 10, 2009

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ISSN: 1559-3959
The effects of warping constraints on the buckling of thin-walled structures

Marcello Pignataro, Nicola Rizzi, Giuseppe Ruta and Valerio Varano

Vol. 4 (2009), No. 10, 1711–1727
Abstract

We present two applications of a direct one-dimensional beam model suitable for describing the buckling of thin-walled structures. The first application considers the buckling of a compressed beam with an intermediate stiffener under various warping constraints. The second describes the buckling of a two-bar frame, known as a Roorda frame, loaded by a dead force at the joint. Various warping constraints at the bar ends are considered and the relevant buckling modes and loads are numerically evaluated. Numerical results are presented for both cases; some of these appear to be new.

Keywords
thin-walled structures, flexural-torsional buckling, warping constraints
Milestones
Received: 3 December 2008
Revised: 28 April 2009
Accepted: 19 June 2009
Published: 27 February 2010
Authors
Marcello Pignataro
Dipartimento di Ingegneria Strutturale e Geotecnica
Università degli Studi di Roma ‘La Sapienza’
via Eudossiana 18
00184 Roma
Italy
Nicola Rizzi
Dipartimento di Strutture
Università degli Studi Roma Tre
via Corrado Segre 6
00146 Roma
Italy
Giuseppe Ruta
Dipartimento di Ingegneria Strutturale e Geotecnica
Università degli Studi di Roma ‘La Sapienza’
via Eudossiana 18
00184 Roma
Italy
Valerio Varano
Dipartimento di Strutture
Università degli Studi Roma Tre
via Corrado Segre 6
00146 Roma
Italy