2nd Croatian Conference on Earthquake Engineering 2CroCEE

In this study nonlinear static pushover and dynamic time-history analyses of a typical masonry building situated in Palmotićeva street in downtown Zagreb were performed. The building was erected in 1922 before any seismic codes were introduced in practice. It has a basement, four storeys and an attic (total height equal to cca. 23m), and an asymmetric plan consisting of two connected parts: a street part (24.4x12 m) and a courtyard part (10.6x12 m). The floor structure consists mostly of wooden beams except above basement where the RC slab was installed. The solid brick masonry walls with variable thickness (15-90 cm) are evenly distributed in both directions. Results of ambient vibration tests performed before and after the earthquake were used for calibration of the dynamic response in the FE model. Two numerical macro-models were created employing Diana 10.4. Engineering masonry constitutive law was used to describe highly nonlinear behavior of masonry walls which can crush, crack or fail in shear. The first model represents the existing damaged structure. In the second model possible strengthening measures for enhancing seismic capacity were analyzed. The response of the building was assessed in terms capacity curves, inter-storey drifts and cracking pattern.