Experimental study of increased displacement of high-friction elastic sliding bearing subjected to sinusoidal load with mean component

Abstract

With the increasing height of base-isolated buildings, it is necessary to considering their wind resistance performance in design. Specifically, for base-isolated buildings with elastic sliding bearings, there is a concern that, under along-wind forces with a mean component, the windinduced shear force might cause sliding even if it is lower than the sliding load set calculated in seismic-resistant design, potentially leading to the displacement response larger than the design value. Previous studies have demonstrated the relationship between the friction coefficient of sliding materials and the increment of the displacement response. However, these studies used to involve forced displacement method to carry out the experiments, which differ from actual wind loads. In this study, we conducted load-controlled excitation experiments to simulate the real along-wind force with a mean component. From the experiment results, the effects of the maximum wind force and the gust factor of wind force on displacement is investigated.