Performance of repaired steel plate shear wall with earthquake-induced damage

To investigate the repair method of damaged steel plate shear wall in a steel frame, a scaled specimen was designed and tested under a two-phase pseudo-static loading. The damaged infilled steel plates were replaced with new steel plates between the two loading phases. The test results showed that after replacing the damaged infilled plates, the stiffness of the specimen increased. The bearing capacity was 577.3 kN, with a ductility of 3.5. The seismic performance of the repaired specimen was favorable. Replacing the infilled plate was an effective repair method for the steel plate shear wall structure while the columns were still in good integrity. To ensure a reliable post-earthquake performance of the boundary frame and an easy repair for the steel plate shear wall, the plastic development of the boundary column was investigate. By introducing the damage criterion into the finite element (FE) model, the stress redistribution caused by the damage of the infilled steel plate was considered. The shear force of the column at different lateral displacement, especially in the inelastic phase, was obtained. The yielding and damage state of the boundary column can be determined from the proportion of sustained shear force of the column at different displacements.