Numerical Solution Schemes for Highly Nonlinear Static Structural Behavior.

摘要

The feasibility and accuracy of a number of solution schemes for problems of static nonlinear structural response are studied. The structure is modeled by the finite element method, and the nonlinearities are mainly those of material behavior, but large displacement effects are also considered. It is shown that accepted solution approaches do not work as expected in the case of cyclic behavior of the structure around its limit load level. Results from two different finite element structural models are compared with those of an experiment for a simply supported beam undergoing load reversals at its midpoint. This simple example illustrates the numerical problems encountered in analyzing engineering structures under severe lateral loads which initiate failure modes in the structure.