Seismic performance of combined rotational friction and flexural yielding metallic dampers

Abstract

A feature of designing combined rotational friction and flexural yielding metallic dampers, which could be used for prefabricated structures, was presented. The proposed dampers were composed of two energy dissipation systems with the friction damper (FD) by achieving rotational friction and metallic damper (MD) by yielding in flexure. To investigate the seismic performance of the proposed FD-MD connection, low cyclic experiments of rotational friction damper specimen and proposed FD-MD connection specimen were put forward. According to the experimental results, behaviors in hysteretic curves validated that they possessed excellent comprehensive performance of friction and plastic energy-dissipating ability. Consequently, the proposed FD-MD connection was capable of providing an alternative for precast structures in high seismic regions.