Seismic response of base isolating systems with U-shaped hysteretic dampers

摘要: This paper proposes a base isolating system to reduce the seismic demands of low- or medium-rise structures and experimentally investigates its response using shake-table tests. The considered in this study consists laminated-rubber bearings U-shaped hysteretic (UH) dampers which are made high toughness steel (HTS) machined with slotted holes increase their deformation capacities. A isolated 2-story specimen for tests was first designed cyclic UH implemented systems were then carried out. component test shows typically low lateral stiffness enough vertical carry gravity loads. results demonstrate that use HTS material introduction details capacities by inducing uniform stress distribution along damper. Finally, performed specimens shaken increasing ground acceleration records. show proposed limits structure lengthening structural period, concentrating displacement on floor adding energy dissipation from dampers.