Seismic vulnerability evaluation of trapezoidally Corrugated Steel Shear Walls under near-and far-fault earthquakes using fragility curves

To make structures resistant to earthquakes, various systems are used, one of the most important of these systems is a steel Moment frame with a steel shear wall, which has been used as one the systems since the 1970s. Steel shear walls are usually made in two types, stiffened and unstiffened. The idea of corrugated steel shear walls was proposed as a replacement for stiffened shear walls. These plates have high buckling resistance due to their out-of-plane stiffness. This research investigated the seismic behavior and vulnerability of steel structures with horizontally and vertically corrugated steel shear walls using ABAQUS nonlinear analysis software. For this purpose, after validation of the modeling by controlling with an experimental study, 280-time history analyses were conducted. Then fragility curves were produced on 3 and 10-story structures.7- acceleration records of the far-Fault earthquakes and 7 acceleration records of the near-fault earthquakes were used to generate the fragility curves. The results showed the 3-story structure suffered damage at a lower acceleration compared to the 10-story structure. The structure was more fragile under near-fault rather than far-fault earthquakes. The highest percentage of damage reduction in the far-fault earthquakes compared to the near-fault occurred in the 10-story structure at the life safety performance level (LS). Further in trapezoidal samples, by changing the direction of placement of corrugation plates from horizontal to vertical, the probability of wall failure decreased at different PGA levels.