Sliders and tension controlled reinforced elastomeric bearings combined for earthquake isolation

摘要: Essential requirements from a base isolation system include wind restraint, stability and fail-safe capacity. A new that satisfies all three possesses other advantages was tested on the earthquake simulator at University of California under one-fourth scale nine storey steel structure. The behaves as fixed for low magnitude inputs. When sliding starts rubber bearings provide additional stiffness recentering. Displacements are better controlled than ones purely elastomeric system. Vertical deflections due to large horizontal drift encountered in solely systems eliminated. fail safe capacity is provided by tension restrainers installed inside bearings, constant contact with sliders. Base shear hysteresis loops drastically enlarged presence