Evaluation of seismic performance of an educational institution using nonlinear dynamic analysis

Abstract

Currently, there are a large number of old educational institutions that are still in operation and have been built without taking into account seismic-resistant criteria. Since these buildings are considered essential, they must maintain their operability during and after a seismic stress. In this research, two two-story modules with regular floor plans belonging to an educational institution built in 1994 were analyzed, which are characterized by having a reinforced concrete portal frame system in the X direction and a confined masonry system in the Y direction. These modules were analyzed by applying the linear parameters of NTP. E.030 and nonlinear methodologies such as ADNL, where the structures were subjected to three seismic events that occurred in Peru, which were corrected, scaled and made compatible with the response spectrum by means of the Seismosignal and Seismomatch software. The ETABS software was used for the modeling and following the guidelines of ASCE 41-17 and FEMA 356, the response of the seismic records in the north-south and east-west directions was evaluated, obtaining the shear and displacement vs. time drifts and graphs. Based on the results, the seismic performance for both directions was obtained, taking into account the performance levels given by HAZUS99, determining that in the X direction it presents a performance of "Complete structural damage" and in Y of "Slight structural damage", concluding that for this type of buildings a structural reinforcement in the X direction is necessary to improve such performance.