Hysteretic Behavior of Advanced PFD-SMA Frictional Damping Brace Systems

A traditional Pall friction damping brace system is improved by a Pall-typed frictional damper-shape memory alloy(PFD-SMA) brace system,which makes full use of PFD and the advantages of SMA.The system has the energy dissipation ability and self-resetting function.The influences of SMA's stiffness,slip force of the Pall-typed damper,maximum recovery strain,elasticity modulus,and length of SMA brace are analyzed.Results show that the PFD-SMA frictional brace system has the same energy dissipation with an origin Pall brace system,even in the case of hugging SMA brace can consume energy by itself.The system has a dual self-resetting function by SMA's super-elastic performance and shape memory effect.