Pushover de un marco de mampostería no reforzada y análisis de 2 tipos de reforzamiento: flejes de acero estructural y flejes de acero más anclajes

Abstract

Nowadays, unreinforced masonry walls with arched openings are very common in heritage structures, which were not built with any regulations or seismic design, as it is currently done. The present research work is an alternative of reinforcement for this type of structures without having to damage them on a large scale and improve their useful life. In order to carry out this research, a nonlinear pushover analysis of the masonry structure was performed using the structural analysis softwares DIANA 10.2 and SAP 2000-V19. For the analysis of the masonry wall, it was considered as a structure of a single homogeneous and isotropic material, while for the steel anchors and straps, we additionally used structural steel smooth rods NCh203 A420-270 and steel plate ASTM A-36, which were selected from the reinforcement carried out in the Pereira Palace in Santiago, Chile. Once the results were obtained, it was possible to verify the model of Howlander et al. (2020) and that masonry reinforced with steel strapping plus anchors has greater strength than masonry reinforced only with anchors, which in addition to improving the behavior of the masonry wall, increases its resistance to possible seismic movements.