Influence of infill masonry on the seismic performance of reinforced concrete frame structures

Abstract

In this paper, the structural seismic performance is evaluated by nonlinear analysis according to the ASCE/SEI 41-17 methodology, and the probability of collapse of structures subjected to 11 ground movements, scaled to hazard levels corresponding to serviceability, design, and maximum considered earthquakes, is determined. Three-dimensional Finite Element Models (FEM) of one, two, and three-story frame structures are evaluated subject to eleven different ground motions, selected and scaled to represent these hazard levels. Following the methodology mentioned earlier, collapse probabilities are estimated for RC frames typical of Ecuador. Structures in this study are divided into two categories: those designed according to seismic-resistant engineering practice and those built without engineering design. For each category, infilled and non-infilled frames are distinguished. Infill masonry negatively impacts structural performance and the collapse probability of frame structures. Damages observed during previous earthquakes are consistent with the results of this study.