Title:
Modeling of Nonlinear Cyclic Behavior of Reinforcing Bars
Author(s):
H. Nakamura and T. Higai
Publication:
Symposium Paper
Volume:
205
Issue:
Appears on pages(s):
273-292
Keywords:
buckling; finite element method; large deflection theory;
stress average strain relationship
DOI:
10.14359/11644
Date:
1/1/2002
Abstract:
The buckling of reinforcing bars is investigated analytically and several indices which characterize the buckling behavior are introduced based on the analytical results. In this paper, buckling analysis of the reinforcing bars is performed by the finite element method using large deflection theory of layered beam elements. The buckling behavior is considered under monotonic and cyclic loading. Based on the analytical results, several indices such as the buckling stress, the residual stress and the buckling mode are used to characterize the buckling behavior. Considering these results, a stress-average strain relationship of the reinforcing bars is developed accounting for inelastic buckling. The model features a post-buckling softening branch, since the buckling behavior is considered in the form of a material property, which is an easy method to introduce the effect of buckling in the finite element method.