Study of Different Bracing Systems in RC Structure for Seismic Resilience - A Comparative Performance based Review

Reinforced concrete (RC) structures that have been designed without appropriate seismic detailing are extremely prone to seismic hazards. The obvious reason is that RC structures lack lateral strength quantities along with poor ductility and capacity to dissipate seismic energies. The probable outcome could be significant inter-storey drift followed by brittle failure. Steel Bracing Systems have proven to be an efficient method in seismic retrofitting measures that may be adopted in RC structures in order to improve their seismic performance. The current paper emphasizes the extensive comparative performance-based evaluation of regular as well as advanced types of Bracing Systems in RC Structural Systems, like diagonal, X, V, and inverted V Bracing Systems, along with buckling-restrained Bracing Systems, self-centering Bracing Systems, variable stiffness Bracing Systems, hybrid Bracing Systems along with Bracing Systems having damper components. Special attention is given to nonlinear static and dynamic assessment concepts along with resilience-based assessment measures. This assessment also identifies the major gaps for future R&D activities related to unified comparative approaches, mode shape sensitivity, as well as resilience measures. This establishes a technical basis for possible future earthquake assessment and retrofit of R/C structures.