In recent years, shape memory alloys (SMAs) have received increased attention in the field of civil engineering due to their unique features such as; superelasticity (SE), shape memory effect (SME), high ductility and good corrosion resistance. In this study, these unique features are utilized in a seismic retrofitting of a reinforced concrete external beam column joint. The efficacy of the retrofitting scheme was experimentally tested under cyclic loading on a full-scale beam column joint representative of pre-1970’s (non-seismically designed) construction practice. Reinforced concrete beam-column joints of this period are typically deficient in joint core shear reinforcement. The retrofitting strategy utilized the ability of pre-strained SMA wires in constrained conditions to generate a significant amount of recovery stress (prestress) when heated above the transformation temperature. Essentially, the prestress force achieved in the wires when the phase is changed in the SMA wire are to be used to actively confine the reinforced concrete beam-column joint.
|Publication status||Published - Jun 2018|
|Event||16th European Conference on Earthquake Engineering - Thessaloniki Concert Hall, Thessaloniki, Greece|
Duration: 18 Jun 2018 → 21 Jun 2018
Conference number: 16
|Conference||16th European Conference on Earthquake Engineering|
|Period||18/06/2018 → 21/06/2018|
- Shape memory alloys, Heat activated prestressing, Active confinement of Concrete, beam-column joints