Postbuckling behaviour of thin-walled girders with orthotropy varying widthwise

摘要

Postbuckling behaviour of elastic thin-walled orthotropic girders has been analysed within the second order of the Koiter's asymptotic stability theory of conservative systems (Koiter, 1963). Girders built of orthotropic plates with the principal directions of orthotropy parallel to the wall edges characterised by a widthwise varying orthotropy coefficient beta (i) = E-yi/E-xi have been investigated. The girders with square and trapezoid sections, simply supported on the loaded edges, have been analysed. The girders have been subjected to the loads that cause a uniform and linearly variable shortening of the edges. (C) 2001 Elsevier Science Ltd. All rights reserved. [References: 8]