Abstract：Buckling-restrained multi-stiffened low yield point steel plate shear walls (BRMS-LYP-SPSWs), which uses LYP steel as infill
plate and multiple stiffeners to restrain its overall buckling, is a new type of system to resist lateral force. Three specimens with
1/3 scale of single-span and two and a half stories semi-rigid frame with BRMS-LYP steel plate were tested under low-cycle reverse
loading, in order to systematically study the seismic behavior of the new structural member. Comparative analyses on loading capacities,
ductility, lateral resistant stiffness and energy dissipation capacities of the specimens were conducted, and then the influence of
joint stiffness and connection form between frame and shear wall were evaluated, so that the failure modes of three specimens can be
investigated. The test results indicate that the BRMS-LYP-SPSWs possesses stable bearing capacity, excellent plastic deformation
behavior, high initial lateral stiffness and good energy dissipation capacity. All of the hysteretic curves appear to be spindle, which
may be attributed to the utilization of BRMS and the role identical to two-side connection due to BRMS. As a result, the mechanical
performance of the steel plate can be effectively enhanced and the pinch shrinkage of hysteretic loop can be obviated. The innovative
structural system possesses the desirable yielding sequences and reasonable failure mode. The beam-column joint has slight effect on the
seismic behavior of specimens, and decreasing the stiffness of connection may improve the structural ductility and energy dissipation.
Eventually, the theoretical predictions of bearing capacity and initial stiffness of each specimen were compared with the experimental
results, and good agreements could be observed.
