Shaking table test for evaluating the seismic response characteristics of concentrically braced steel structure with and without hysteretic dampers

Abstract

This study represents a summary of a current experimental program in the application of an energy dissipation system for seismic protection of structures. Shaking table test has been carried out for the structures with and without a hysteretic damper device for two types of structures in one direction (CBSS: Concentrically Braced Steel Structure, HDSS: Hysteretic Damper Steel structure). The hysteretic damper device which is proposed in this study has been developed to provide relatively high initial stiffness, stable hysteresis with the limited but controlled yield strength in different stories in order to have equal plastic deformation in high intensity of ground motion, and excellent energy dissipation capabilities. The experimental results and test method have been outlined here. In this experiment, the non-linear dynamic response analysis has been performed with different scaling factor for the two types of idealized three-story concentrically braced steel structures. It has been emphasized that the hysteretic damper can absorb the majority of input energy from earthquakes in order to reduce the displacement and damage to the main steel frame. The mechanical properties of dampers such as yield strength and stiffness are defined to have the equal damage at each story.