A novel shape memory alloy-based element for structural stability control in offshore structures under cyclic loading

Abstract

ABSTRACT Wind and ocean waves highly influence the performance and functionality of structures, requiring an efficient control element. The structural behavior of one of the most recent structural control elements, namely shape memory alloys (SMA)-based control element, under cyclic loadings of oceans waves, has been investigated. Shape memory alloys are one of the attractive smart materials with the ability to return to the initial shape after experiencing large deformation. Experimental tests have been conducted to study the effects of cyclic loads on several specimens of the SMA wires. The SMA wires are being used in the SMA-based structural control system to dissipate the energy of external loading and enhance the structural dynamic behavior of offshore structures. It is realized that the number of loading cycles and the amount of the initial displacement reduce the strain recovery of the SMA-based element.