Research on the seismic performance of modular buckling-restrained slotted steel plate shear wall

This paper introduces a novel type of modular buckling-restrained slotted steel plate shear wall (MS-SPSW), comprising modular steel plates with inclined slots, transverse and longitudinal skeleton frames, concrete panels, frame beams, and frame columns. This design addresses challenges related to the large size of steel plates, their difficult processing, and transportation, thereby facilitating standardized production of shear wall components. The inclined slots on adjacent modular steel plates are symmetrically arranged, ensuring the MS-SPSW exhibits highly symmetrical hysteretic behavior. To investigate the seismic performance of the MS-SPSW, a 1:3 scale specimen was fabricated and tested under quasi-static cyclic loading. The results show that the novel MS-SPSW underwent a total of 28 loading cycles, reaching a maximum lateral displacement of 54.0 mm (6.0 % drift ratio). The numerical model was developed and validated against the test results. Parametric studies investigated the effects of T&L skeleton frames, slot width, strip spacing, and steel plate thickness. Finally, a theoretical derivation of the ultimate load-bearing capacity formula for the MS-SPSW was presented.