Simulation of Collapse of Framed Structures (Part 2)

Abstract

The purpose of the present study is to develop the economical finite element analysis program for the collapse simulation of framed structures and to verify the validity of the developed code through the comparisons of the numerical results with the test results. In the first report, the details of the incremental formulations were described, in which the linear Timoshenko beam element was employed with the variable location technique of the numerical integration point and the elasto-plastic constitutive equation expressed in terms of resultant forces. In this second report, the finite element results by the updated Lagrangian formulation are compared with the crush test results conducted for beams, columns and space frames. The strain hardening and the frictional contact are taken into account in the present analysis. The obtained results can be summarized as follows : (1) From the results for beams and columns, it can be seen that the present analysis method gives sufficiently accurate solutions for the crush problem accompanied by large strains and large displacements, except for the cases that local deformations as shells are obvious(2) From the results for space frames, it can be seen that the developed code is sufficientlyeconomical and accurate from a practical point of view, however, some trial-and-error analyses are necessary for the crush behaviors in which friction and contact play important roles.