Improved seismic behavior and performance of energy-absorbing systems constructed with steel rings

Abstract

In this study, an innovative energy dissipation system of steel dual-ring dampers (SDRDs) system are provided and investigated using numerical method. The aim of this study are provided the energy absorption system to improve the hysteresis behavior and performance of steel ring dampers (SRD). Hence, two types of SDRDs with different connection details between inner and outer rings are presented. Extensive parametric studies have been performed to evaluate and compare the proposed damper with traditional SRDs. To evaluate the proposed dampers, finite element models were modeled and analyzed under cyclic loading, and finally validated with the results of several experimental specimens. In order to evaluated the results of this study, a comparison are performed between the parameters key the seismic behavior of steel ring and steel dual-ring dampers. The results show that the SDRDs significantly increases the seismic parameters compared to the ring damper. So that in the steel dual-ring dampers yield capacity, ductility and energy dissipated by up to 67.8%, 44.0% and 60.9%, respectively, increase compared to the steel ring damper. Also, the results show that the details of the construction of the internal and external ring connections were a considerable effect on the performance and hysteresis behavior of the SDRDs.