Time-Dependent Reliability Based Design of GFRP-Reinforced Bridge Decks in Nova Scotia

Abstract

The use of glass-fibre reinforced polymer (GFRP) reinforcement in bridge decks has gained popularity due to its corrosion resistance. However, review of design practice of bridge decks in Nova Scotia (NS) indicates that GFRP-reinforced decks have similar design specifications as the steel-reinforced bridge decks, despite the differences in their durability performance. The objective of this research is to propose durable alternative GFRP-reinforced bridge deck design options for NS in accordance with CSA S6-19. A two-phase approach was implemented to deliver on the project objective: development of a time-dependent reliability analysis framework to assess bridge decks using Monte Carlo (MC) simulation (Phase I); and application of the framework by performing a comprehensive parametric analysis to propose alternative design options (Phase II). The parametric study in Phase II yielded four recommended alternative designs which specify the minimum deck section depth, maximum concrete cover thickness, and specified concrete compressive strength for deck sections.