Advances in Analysis and Design of Slender Concrete Columns Reinforced with Fiber-Reinforced Polymer Composites

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In the past three decades fiber-reinforced polymer (FRP) composites have emerged in structural engineering with superior characteristics for the strengthening of existing structures and the construction of new systems. The use of FRPs in short concrete columns have been extensively investigated and the outcomes have been translated into design guidelines and codes for practicing engineers. However, the performance of long (slender) concrete columns with significant lateral (second-order) deformations induced by axial compression loading and consequence buckling failure have not been investigated with required depth and breadth to establish a comprehensive data platform for the development of reliable design equations and procedures. The applicant has contributed to the field of slender columns in the past five years and is ready to take the research to the next level creating a significant advancement in the field. As Canada Research Chair (Tier 2) in Sustainable Infrastructure, the application has also acquired a state-of-the-art CFI equipment and built a unique horizontal test setup to test a variety of slender columns. The test setup can accept a broad range of slender columns (virtually up to 15 m long) and different cross-sectional geometries. In this research program, large-scale slender columns will be under out of axis (eccentric) axial compression loading. The following parameters will be considered: (1) internal and external reinforcement systems in forms of FRP bars, laminates, tubes an shells; (2) shape of cross-section including rectangular and circular sections; (3) slenderness ratio; (4) load eccentricity; (5) reinforcement ratio; and (6) FRP strength and modulus. The research program will also include a comprehensive theoretical study based on the second-order deformations considering a broad range of cross sections, boundary conditions, material properties, and FRP systems. The theoretical study will be verified against the experimental study to perform a comprehensive parametric study. The parametric study will be geared toward creation of large data platform for statistical and reliability-based analyses to propose reliable design equations and procedures to fill the gaps of current CSA design codes for manufacturers and practicing engineers. The research program will also provide a strong platform for training highly qualified personnel skilled in advanced technologies. The outcomes of the research program not only will serve to elevate Canada to a leadership position in the area of slender columns and associated advanced technologies, but also will seek innovative and sustainable solutions for the country's deteriorated infrastructure, such as bridges and water front structures with slender columns.