Seismic Evaluation of Buildings with Pushover Analysis I

Seismic Evaluation of Buildings with Pushover Analysis I

If the result of the preliminary seismic evaluation of a building showed low seismic resistance, it will need more precisely seismic evaluation. To decide it will need retrofit or rebuild. The precisely seismic evaluation is the final seismic evaluation tool, it can check the result of the seismic retrofit. This paper introduced the ETABS-Nonlinear to be a tool program for the precisely seismic evaluation. ETABS program provides non-linear static analysis also named pushover analysis. It can be used to get the relative curve of the base shear versus the roof displacement. The relative curve of the base shear versus roof displacement can present the relation of the loading and deflection of the structure. The seismic resistance of the structure is not only controlled by the strength but also by the stiffness. This paper introduced the equivalent column mode which simplifies the simulation of the reinforced concrete walls and the equivalent truss mode which simplifies the simulation of the brick walls. Through the verification with the experiment data, they can successfully provide the settings of the plastic hinged of the shell element in the ETABS program. Then, the seismic evaluation method which suggested by this paper can provide the engineers a way to precisely seismic evaluation.