PRACTICAL BUCKLING CAPACITY CURVE FOR COUPLED INSTABILITIES OF PLATES

摘要

A model for the investigation of structures with plate buckling risk is presented by applying finite element analysis with code-related modified algorithms. The advanced finite element analysis is used for the determination of the lowest buckling loads for the complete structure and loading situations as well as the calculation and localisation of the equivalent stresses of the buckling structure. A good approach for the following buckling design calculation is the application of the Huber-Mises-Hencky yield criterion. Great attention has to be paid for structures with low or no post-buckling strength reserves. Here the used buckling capacity curve suggested by Winter has to be reduced. Some methods for the estimation of the post-buckling carrying capacity and the interaction between plate- and column-like behaviour of such structures are presented.