A SEMIANALYTICAL METHOD FOR THE ANALYSIS OF THE INTERACTIVE BUCKLING OF THIN-WALLED ELASTIC STRUCTURES IN THE 2ND-ORDER APPROXIMATION

The investigation is concerned with a semi-analytical method or the in teractive buckling analysis of thin-walled closed and open cross-secti on structures in the second order approximation based on the linear an alysis. An improved ''lower bound'' approach by Koiter and Pignataro [ Koiter, W. T. and Pignataro, M. (1976). A general theory for the inter action between local and overall buckling of stiffened panels. WTHD Re port No. 556, Delft University, p. 49] enables us to determine the ove rall flexural stiffness of a beam-column after its local buckling. The theoretical basis of the present approach is discussed and some typic al examples are considered. Copyright (C) 1996 Elsevier Science Ltd