Abstract
The present study evaluates the utilization of shotcrete sandwich panel (SSP) infill and CFRP strips to strengthen reinforced concrete (RC) frames. To this end, a CFRP diagonal strip-infilled RC frame, an SSP-infilled RC frame, and a control specimen (a bare RC frame) were examined as single-story specimens in terms of the in-plane seismic response. This work compared the specimens in the stiffness degradation, damping, and cyclic lateral response. Also, the available empirical techniques were subjected to performance comparison in the stiffness and capacity calculation of masonry infills for the SSP infill system. The structural performance levels of the system were calculated and compared to the ASCE 41 code. Eventually, numerical analyses were carried out in order to examine the specimens in nonlinear behavior. It was found that the SSP-infill led to a two-fold rise in RC frame strength, even though system stiffness increased. Moreover, the ductility of the infilled frame experienced a 42% improvement in light of the CFRP diagonal strips.
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