Abstract:
In this study, design parameters of friction damper-brace system (FDBS) and their influence on seismic response of low-to-medium-rise building structures are investigated and a guide for optimal design procedure of FDBS is presented. First, numerical dynamic model of a SDOF building structure equipped with FDBS is proposed. Then, design parameters of FDBS in SDOF structures are introduced and their influence on dynamic response of the system is examined. Next, the numerical dynamic model and design parameters of FDBS are generalized to MDOF building structures. In this stage, numerical analyses were performed on some example building models and improvement of seismic response of the structures with respect to variations of design parameters of FDBS including: total slip-load ratio of friction damper devices (FDD), number of FDD installations, and arrangement of dampers along height of building structures, was investigated. In order to evaluate effects of fundamental period of the structure on design procedure of the FDBS, different periods were considered. To examine arrangements of FDD installations along height of the structures, different states of damper placement were compared.