Post-Earthquake Dynamic Performance of Intact Masonry Building Based on Finite Element Model Updating

The recent seismic activity in Croatia has inflicted significant damage upon numerous buildings, with masonry structures being particularly affected. Consequently, experimental investigations and structural condition assessments’ have garnered increased attention, as they become integral to the renovation process for such buildings. Additionally, assessing prior events is vital determining extent which earthquakes impact stiffness of systems, structures. This paper presents results numerical analysis conducted on a damaged high school building Sisak, Croatia. investigation involved shear testing, flat jack analysis, operational modal analysis. Utilizing available drawings mechanical properties determined experimentally, an initial model was developed. Subsequently, through iterative finite element updating, refined based dynamic properties. updated then employed assess earthquake event. study contributes field by providing insights into post-earthquake estimation intact utilizing comprehensive approach that combines updating. By quantifying changes parameters, natural frequencies mode shapes, provides valuable response characteristics building. observed differences between undamaged states are follows: 9% first shape, 6% second 2% third shape.