抄録
Most of the passive control devices currently used for buildings can be categorized into a velocity-dependent (visco-elastic or viscous) device and a displacement-dependent (elasto-plastic or friction) device. A visco-elasto-plastic (VEP) damper that combines in series a visco-elasto device and a friction device shows better performance than either one of the devices. We have conducted dynamic testing of a frame structure having the VEP damper, and have confirmed proper functioning of the structure. A series of analyses were also conducted for this passive control system, by using a fractional time-derivative visco-elastic constitutive rule and a bilinear elasto-plastic constitutive rule, and the results appear to correlate remarkably well with the experiments. Simplified expressions are proposed for deformations of both devices of the damper, as well as effective stiffness and damping of the damper and structure.
