Understanding the Seismic Behaviour of FRP Retrofitted RC Shear Walls: Past and Present
This paper provides an overview of studies on experimental testing and analytical modelling of reinforced concrete (RC) shear walls retrofitted with externally bonded fiber-reinforced polymer sheets (FRP) conducted at Carleton University. The experimental investigations include cyclic lateral load tests on FRP retrofitted RC shear walls in repair and strengthening applications, including those with varying aspect ratios ranging from slender flexural walls to squat walls dominated by brittle shear behaviour. The effectiveness of the FRP retrofit in recovering or enhancing the earthquake resistance of deficient RC structures as well as those that meet modern design standards are investigated. Parallel to the experimental studies, analytical research has also been carried out to develop computer models for predicting the behaviour and performance of FRP retrofitted RC shear walls. These include simplified models suitable for design as well as detailed models that capture the complex interaction and debonding failure mechanisms of the FRP sheets. Ongoing studies combine experience with experimental and analytical modelling and focus on the use of hybrid simulation to accurately capture the system level earthquake response and performance of FRP retrofitted RC shear walls.
The contributions from current and former graduate researchers on the project are acknowledged. The research team includes former graduate students Stelios Hiotakis, Nicolas Londono and Joshua Lombard. Funding for the research program has been provided by the Canadian Foundation for Innovation, Canadian Seismic Research Network, Natural Sciences and Engineering Research Council Canada and Public Works and Government Services Canada. This support and the FRP materials and technical assistance provided by Fyfe Co LLC, Brighton Engineering Taiwan, and Master Builders Technologies are gratefully acknowledged.
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