Abstract
Experimental study was conducted on six 1/6 scale steel-enhanced damping concrete composite core walls (SEDCCW) with steel plate bracings under cyclic load reversals and constant axial load, to investigate the influences of stirrups in boundary zone, layer number of X-shaped steel plate bracing, encased steel arrangements of boundary zones and coupling beams, the aspect ratio (AR) and the axial compression load ratio (ALR) on the seismic behavior of the specimens. The cracking patterns, failure modes, load-bearing capacities, ductility factors, energy dissipation capacities and shear lag effects of the specimens were discussed. Then parametric analysis was carried out on 27 numerical models based on verified finite element models to assess the influences of the ALR and the AR of specimens, span-to-depth ratios of coupling beams, the encased steel ratios of corner columns, hidden columns and coupling beams, steel ratios of wall bracings on the overall seismic performance of the SEDCCW specimens. The analysis results indicate that the SEDCCW specimens can also obtain good deformation capacity when the design axial load ratio is less than 1. 0 or span-to-depth ratio of coupling beam is larger than 1.0; the steel ratio of wall bracing is the most influential factor on load bearing capacity and deformation capacity of the SEDCCW specimens, the influence of encased steel ratios of corner columns and hidden columns on ductility of the SEDCCW specimens is greater than that of encased steel ratios of coupling beams.
Published Version
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