STUDY ON SEISMIC PERFORMANCE OF HIGH DAMPING CONCRETE COUPLED SHEAR WALLS WITH CONCEALED STEEL PLATE BRACINGS

Quasi-static cyclic loading tests on two one-fourth scale models of four-story high damping concrete coupled shear walls (HDCSW) with concealed steel plate bracings are carried out, the bearing capacity, ductility, energy dissipation, and failure characteristics of the test models are analyzed systematically and are compared with those of HDCSW with mixed concealed bracings. Meanwhile, finite element analysis of HDCSW with concealed steel plate bracings under low-cycle load are conducted using the software ABAQUS. The results of numerical simulation and model experiments show that, compared with the HDCSW with mixed concealed bracings, the ultimate bearing capacity, the energy dissipation and the deformation capacity of the HDCSW with concealed steel plate bracings are improved; with decreasing span-depth ratio in the coupling beams, the HDCSW with concealed steel plate bracings show increasingly better seismic performance; when the steel ratios of wall limbs and coupling beams are less than 2.5% and 3%, respectively, the effect of the steel ratio on the ultimate bearing capacity of the HDCSW with concealed steel plate bracings is greater.