Development of a high-performance hybrid self-centering building for seismic resilience

Abstract

In the present paper, a novel hybrid self-centering system is introduced. This system, called the Hybrid Self-centering Pall friction (HSP) system, consists of Self-Centering Dampers (SCDs) and Pall Friction Dampers (PFDs). The design methodology of HSP systems is developed and some examples of the designed HSP are presented. HSP systems not only have the capability of dissipating energy but can also remove or arrange residual drifts of structures. In fact, HSP systems are comprised of a combination of SCDs and PFDs that can maintain design target residual drifts (zero or any) during lateral loading similar to SCD and have the benefits of high capacity energy dissipation of PFDs. The HSP system is developed for seismic resilience in terms of economic benefits, ready-to-use after the earthquake event, and practical fabrication. To evaluate the proposed design method, different low- to high-rise buildings equipped with SCDs are selected from the literature, redesigned based on the proposed method, and then subjected to cyclic loading. Results are presented in terms of the cyclic response, residual drift, maximum story drift, and maximum floor acceleration of structures. Results indicate that the proposed design equations precisely meet the target structural performance of the HSP system and the HSPs system is obviously a superior system compared to the SCDs or PFDs.