A NEW FORMULATION OF DAMAGE INDICATOR FOR STRUCTURES SUBJECTED TO CYCLIC AND MONOTONIC LOADING

In this paper a new formulation of damage indicator is proposed for reinforced concrete members. To evaluate this factor it is considered both an energetic analysis method and the weighting of repeated cycles in their real occuning sequence. Th~s damage indicator is a numerical value of range 0% - 100% inmcating the state of damage of a structure when subjected to monotonic or cyclic loadmg. It allows either to decide (for repairing or destroying constructions) after earthquake or to design structural elements. Applying th~s method gives a regular distnbution of damage up to failure and allows to give an idea of fatigue damaging. The damage indicator evaluated on the columns tested by J.G. Sieffert et al. reaches about 5% when the first tensile cracks appear, 45% when the first compression cracks occur, and 100% at failure.