Inelastic Design of Earthquake Resistant Reinforced Concrete Buildings Considering Displacement and Energy Limits
A. Shibata, N. Inoui, and N. Hori
Appears on pages(s):
damage; ductility; earthquake-resistant structures; energy; reinforced concrete; Design
In the earthquake-resistant design of reinforced concrete (RC) buildings, it is necessary to evaluate inelastic behavior and damage of structures both by maximum displacement and by total energy dissipation. In this study, damage assessment of RC structures is carried out based on energy response. Damaging potential of earthquakes to structures is estimated by total input energy; damage of structures is estimated by the damage index taking account of both maximum response and cumulative damage. From the results of parametric inelastic response analyses using simulated earthquakes, it is considered that total input energy depends primarily on earthquake property. The damage parameter proposed by Fajfar, which relates ductility factor to dissipated hysteretic, seems to be relatively stable in many cases. The damage parameter is found useful to represent earthquake response pattern of structures. Using the damage parameter and the damage index, a procedure is presented to find yield force and corresponding ductility factor for given value of damage index. This study shows a possibility of a design concept of RC buildings considering displacement and energy limits.