3D CYCLIC FE ANALYSIS OF BEAM-COLUMN CONNECTIONS

摘要

In recent years significant effort in modeling of concrete and RC structures loaded under general loading conditions has been made. At the macroscopical level of the material modeling the main difficulty appears to be the modeling of concrete. Presently there exists no model based on the stress and strain tensor and their invariants that is capable to predict the behaviour of concrete, not only for the case of three-dimensional (3D) monotonic loading, but also for general 3D cyclic loading. Principally, the microplane model offers such prediction capability. Recently, the general 3D cyclic microplane model for concrete has been improved and extended for general use in the 3D modeling of any material type. The model is implemented into the special purpose finite element code (MASA) and coupled with the nonlocal microcrack interaction approach. In the present paper the numerical results of the 3D cyclic analysis for reinforced concrete beam-column connections made of normal and high strength concrete (NSC and HSC) are presented and discussed.