Abstract
The effects of axial load on a SRC beamcolumn subjected to a constant axial load and a bending moment have been studied by many researchers. However, the collapse mechanism of columns has not yet been investigated theoretically. In this paper, using a finite difference equation and an elasto-plastic numerical analysis, we investigate the basic behavior and the collapse mechanism of the columns having various axial load ratio. Based on the analytical results, we show that there exists a stability limit axial force in SRC beamcolumns forced a constant axial load and a repeated bending. As a result, it is verified that if the axial load is less than the stability limit axial force, then the column will keep its bending strength, and therefore, it will have a stable behavior.
