Investigating the Behavior of Composite Shear Walls with Corrugated Shape Memory Alloys Plate and Steel Fiber Concrete under Cyclic Loading

Adding reversibility and restoring plastic deformation in all structures, including composite shear walls, have been discussed in recent decades. The design parameters of composite shear walls can technically and economically affect these walls' behavior against the loads. In this study, the behavior of composite shear walls with corrugated nickel-titanium shape memory alloy (SMA) plates against cyclic loading as an innovation is investigated. Variables were the type of plate, corrugated plate type, and the strength grade of concrete used in the shear wall. On both sides of the wall, steel fiber-reinforced concrete (SFRC) was used. Compressive and splitting tensile strength tests were conducted to determine of tensile and compressive behavior of concrete. ABAQUS software was used to simulate the composite shear walls. The accuracy of the simulation method was evaluated compared to similar laboratory studies, and a good agreement was observed. The results showed that the use of SMA corrugated plates makes it possible to use composite shear walls' greater capacity and ductility to achieve a structure resistant to seismic loading. Using SMA plates in composite shear wall systems due to these alloys' special properties can be a practical step in improving seismic responses. The bearing capacity of composite shear walls with SMA plates is 1.4-2.25 times higher than composite shear walls with St37 plates, depending on the wave type and concrete grade. The use of SMA eliminates nonlinear behavior and residual strains of the shear wall composed of steel fibers and absorbs the wall's energy. Therefore, the energy in the boundary elements is significantly reduced.