Simplified out-of-plane seismic behavior assessment of non-structural rocking walls

This paper provides a simplified tool for preliminary seismic assessment of the out-of-plane behavior non-structural walls, such as unreinforced masonry partition based on non-linear time-history analyses. The studies are performed using equivalent single-degree-of-freedom systems and trilinear hysteretic models. stability is investigated through statistical computed displacement demand related to spectrum-compatible ground motions. model developed by Doherty Griffith used in investigations. rigid body assumption its accuracy was extensively validated experimental results. Four sets 12 recorded earthquakes, slightly modified match design response spectra different soil conditions, were motions Non-structural walls located at level well upper floors also examined. obtained results show that static criterion an accurate estimate resistance rocking (i.e., vertical cantilevers with behavior). According acceleration threshold corresponds product wall aspect ratio gravity (g). Compared results, corresponding calculated limit safe side. Moreover, considering floor spectra, this approach may be easily extended situated storeys.