Análisis comparativo técnico-económico de un edificio de sistema estructural de hormigón armado y disipadores sísmicos, con losas de hormigón armado tradicional, postensado y placa colaborante.

Abstract

A comparative technical and economic analysis of a building with a reinforced concrete structural system equipped with seismic energy dissipators is carried out, with three different types of slab: traditional reinforced concrete, steel deck and post-tensioned concrete, in order to know which of them the structure presents a better behavior against a seismic event and which one has the lowest price. The energy dissipators used in this work are buckling restrained braces, which show hysterical behavior. A time-history analysis is performed to determine which of the three alternatives in this study has the lowest drift in both the X and Y directions, using seven records of pairs of earthquakes, so an average response can be obtained. A budget has been made for each of the three proposed models based on the analysis of unit prices of the items for gray work exectution. From the results obtained with the analyzes carried out, it can be stated that the alternative of the reinforced concrete building and seismic dissipators with post-tensioned concrete slabs is the one that presents a better response against lateral loads, since a lower drift, a lower fundamental period, lower displacements on the top floor and a lower total weight of the structure; in turn, this is the model which the lowest construction price has been obtained.