Damage-based seismic performance evaluation of masonry-infilled steel frames

This paper quantifies the influence of infill walls on the seismic structural damage of steel frame buildings and investigates the interdependency between various seismic parameters and damages by means of correlation studies. A set of artificial accelerograms have been composed and then used in nonlinear dynamic analyses, providing the structural response. Among the several response characteristics, the focus is on the Overall Structure Damage Index (OSDI) after Park/Ang (OSDIPA) and the Maximum Inter-Story Drift Ratio (MISDR). The next step is the creation of an analytical model of a steel frame building and the application of 2 different layouts of infill walls on it, resulting into three different structure types. Nonlinear dynamic analyses have been carried out in order to evaluate the structure's seismic response and the focus is on the OSDI after Park/Ang and the MISDR. The results quantified the positive contribution of infill walls presence.