Seismic Evaluation of Reinforced Concrete Structure with Pushover Analysis

Seismic Evaluation of Reinforced Concrete Structure with Pushover Analysis

This study utilized the capacity spectrum method suggested by ATC-40 to evaluate the seismic resistance of reinforced concrete buildings, and introduced a nonlinear analysis program as a tool to perform a precise seismic evaluation. The capacity spectrum curve is transferred from the relative curve of the base shear versus the roof displacement provided by a pushover analysis. From the pushover analysis, the seismic resistance of the structure is not only controlled by the strength but also by the deformation. The National Center for Research on Earthquake Engineering(NCREE) had proceeded a series of static pushover experiments for school buildings, and this paper compared the experimental and analytical curves in order to verify the suggested seismic evaluation method. The results of analysis show that the proposed analytical method can simulate the strength and the actual seismic behavior of reinforced concrete buildings conservatively. Then, the seismic evaluation method suggested in this paper can provide engineers a way to perform more precise seismic evaluation.