Abstract:
The objective of this research is to introduce a self-centering tension-only brace employing Resilient Slip Friction Joint (RSFJ) applicable for seismic proofing of new and existing structures. This brace features self-centering, non-pinching behavior, energy dissipation and simplicity of design and implementation. Non-linear time-history analyses (NLTHAs) have been performed on a simple 2D steel braced frame designed with a displacement ductility of unity. First, a conventional tension-only brace has been employed and then RSFJs were added to the same frame at the end of the previous braces. Thanks to the superior performance of the RSFJ, the seismic base shear of the frame decreased by a factor of 3. Moreover, a full-scale 5 m high by 3.1 m long simple 2D steel frame has been designed and erected with the RSFJs to undergo cyclic, dynamic and time-history regimes of loading to illustrate the performance of the brace experimentally. Following the numerical modeling and test programs conducted so far, this brace can entice the practitioners into utilizing it in damage-avoidant construction and seismic upgrading up to design level earthquake.