Papers by Charles St-Martin
Over the past 20 years, several earthquakes (e.g. Northridge 1994 to Chile 2010) caused severe da... more Over the past 20 years, several earthquakes (e.g. Northridge 1994 to Chile 2010) caused severe damage to a large number of bridges. Lessons learned from these events led to the development of innovative retrofitting techniques in order to improve the seismic behavior of potentially deficient structures. One of these techniques—wrapping RC columns with carbon-fiber-reinforced polymers (CFRPs)—is now known to improve the seismic response of such critical elements. Confining RC columns with CFRPs increases their ductility and energy dissipation during an earthquake. This paper presents new limit states for such columns, based on an experimental program during which four columns were tested. Each column is 2 m height and 300 mm in diameter. The yielding of the longitudinal and transverse reinforcement, cracks in concrete and the rupture of the FRP were monitored in real time with a nondestructive method called ultrasonic pulse velocity (UPV). A numerical model was developed with OpenSee...
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Papers by Charles St-Martin