Mechanical characterization and seismic performance of ferrocement-retrofitted RC frames infilled with prefabricated RC wall panels under cyclic loading

This study examines the structural behavior of reinforced concrete (RC) frames infilled with prefabricated RC solid wall panels with ferrocement retrofits. The aim is to investigate ferrocement’s contribution to strengthening damaged RC structures and their corresponding seismic resistance. Two scale model 1:3, two storey two bay RC frame specimens were fabricated and tested on reverse cyclic loading. One specimen was used as a control specimen while the one partially damaged was retrofitted using the ferrocement. Structural performance of the structures was evaluated based on load-deflection response, stiffness degradation, ductility, cumulative ductility, energy dissipation, stiffness retention, equivalent damping, and damage propagation under cyclic loading. A conceptual framework integrating a piezoelectric-based structural health monitoring (SHM) solution was also suggested for future crack detection and condition assessment of ferrocement retrofitted RC frames. Experimental results showed that the retrofitted frame possessed notably higher load-bearing capacity, retention of stiffness, cyclic stability, damping effect, and energy dissipation than the control specimen. The results show that the ferrocement material is efficient in seismic strengthening, and the proposed monitoring system can realize the intelligent, durable, and resilient RC structures by integrating piezoelectric sensors with ferrocement retrofitting.