SIMULATION OF THE DYNAMIC BEHAVIOR OF STEEL STRUCTURES UNDER IMPACT LOADING

摘要

This paper presents an analytical technique based on the finite element method for determining the dynamic load-bearing behavior of linear thin-walled bars when subjected to impact loads from any direction. The theoretical basis for the method is the general theory of bending and torsion of thin-walled bars under consideration of shear deformation. The method accounts both for geometric non-linearities in the structure and for physical non-linearities in the material. The behavior at the contact point is idealized by means of a specially developed elasto-plastic contact spring. The numerical algorithm is described by a step-by-step integration technique in the time domain.