Seismic performance of RC bridge piers reinforced through FRCM confinement

Abstract

Corrosion of reinforced concrete (RC) structures is one of the main issues concerning existing buildings and especially of infrastructures. Corrosion phenomena, that is induced mainly by carbonatation and by high chlorides concentration, can significantly affect the performance of existing structures. In particular, the seismic performance can be significantly affected. Loss of transversal reinforcement in RC elements can reduce the concrete ductility while corrosion affecting bending reinforcement reduces the lateral load‐bearing capacity of RC elements. To enhance the performance of corroded elements and extend service life of deteriorated structures confinement is one of the most effective and commonly used techniques. This paper investigates the deterioration of the seismic performance of a RC bridge affected by corrosion and retrofitted through FRCM confinement. Different deterioration and retrofitting scenarios are combined and seismic fragility curves are computed for each case. Finally, time‐variant seismic reliability profiles are used to evaluate the best retrofitting scenario and intervention time to maximize reliability gains.

Sensitivity analysis of parameters affecting the seismic performance of RC columns strengthened by fabric-reinforced cementitious mortar

“…Therefore, it is considered a promising composite material for strengthening RC components, masonry walls, and for constructing slender, lightweight, modular, and freeform structures. Various studies have explored the application of the FRCM system in diverse contexts such as flexural strengthening [29][30][31][32][33], shear strengthening [34][35][36][37][38], confinement of axially loaded concrete [39][40][41][42][43][44], seismic retrofitting of RC members [45][46][47], and masonry infilled RC frames [48][49][50][51][52].…”

“…Numerous studies have been conducted regarding the application of FRCM composites in seismic structural rehabilitation of RC columns [46,53,54]. Bournas et al [28] conducted experimental investigations into the seismic performance of columns with deficient reinforcement details, retrofitting them with FRCM jackets.…”