ABSTRACT
In regions of low and moderate seismicity, force-based models would be of little relevance in representing damage to building contents and non-structural components which are typically unrestrained and hence liable to slide, displace (with “rocking” motion) or overturn. This paper summarises findings from recent analytical and experimental investigations into the dynamic large-displacement (rocking) behaviour of free-standing objects. A simple heuristic model for predicting overturning involves the use of the elastic displacement floor spectrum. A separate model which estimates the level of shock transmitted to an object on impact with the floor is also introduced. Damage caused to the object, or contents contained within a cabinet, could be ascertained by simple calculations based on the model. The methods introduced in this paper could be used to predict damage scenarios of an earthquake event or incidents of blast or impact loading on the building.
