Seismic investigation of longitudinally aligned shape memory alloy-stainless steel reinforced concrete column

Abstract

Shape memory alloy (SMA) is a smart material sustain (8∼13%) an enormous amount of strain and having an ability to regain parental shape after the removal of an external load and temperature due to its pseudo-elastic (SE) and shape memory effect (SME) properties. The SE and SME properties, lower modulus of elasticity, and higher elastic straining of SMA compared to conventional steel reinforcement makes it predictable for the design of the reinforced concrete (RC) structure. The present research is focused on the seismic investigation of RC columns reinforced with SMA rebar in the plastic hinge region along with stainless steel (SS) in the remaining portion of the column. A nonlinear static pushover seismic analysis is used for the numerical investigation of SMA-SS RC column. The numerical model is validated having 98% accuracy with existing literature results. The impact of various parameters on SMA-SS RC column is evaluated for SMA in the plastic hinge region. The results reveal that an aspect ratio, the yield strength of reinforcement, the compressive strength of concrete and axial load are significantly affecting the lateral strength and the ductility of the column under seismic loading.

Structural performance of stainless steel reinforced concrete members: A review

“…A study into the mechanical and structural behaviour of stainless steel reinforcement showed that the ductility of austenitic and duplex stainless steel is approximately three times greater than that of carbon steel rebar [16]. The distinctive ductility property of stainless steel is of particular interest for extreme loading scenarios, such as seismic applications, as it enables structures to last longer, survive greater levels of damage and deformation and also re-distribute loads and stresses through the structure [80][81][82][83].…”