Evaluación del desempeño sísmico del edificio de la Oscus mediante comparación del análisis estático no lineal (Pushover), análisis estático modal (Pushover Multimodal) y dinámico no-lineal (Historia de Respuesta).

Abstract

For this investigation, in first instance the structural plans of the building "Oscus" were obtained, in addition the resistance to compression of concrete was obtained by means of sclerometric tests, the current regulations in the year of construction was the Ecuadorian Code of Construction (CEC-77 in base of ACI 318-71). Based on this information, the building was modeled in three dimensions in Etabs 2016 software, considering non-linearity parameters. For the definition of the demand, the response spectrum and appropriately selected accelerograms were used, adjusted and scaled according to the NEC-SE-DS for an earthquake with probability of exceeding 50 years of 10% . Necessary information was gathered from publications such as: FEMA-440, FEMA- 356 and ATC-40 in addition to scientific articles. Non-linear seismic analysis procedures were performed, such as: Time History (NL-RHA), Pushover (NSP) and Multimodal Pushover (MPA), by defining their respective modal cases, once the analysis was finished, the results were processed. , which were compared in terms of displacements, drifts, capacity and level of damage, where it was possible to detect some deficiencies, limitations, advantages and disadvantages of the analyzes. Of the alternative seismic analysis methodologies studied, the one that produces the smallest errors is the MPA analysis, for this reason, it is concluded that it is the most appropriate. The three analyzes determined that the structure reaches its maximum displacement before fulfilling its objective displacement which means a great inconsistency in its seismic performance demonstrating its high vulnerability and risk of possible collapse.