Document Type : Research Article
Abstract
This research aims to study and validate a numerical model for the structural behavior of partially loaded square high strength reinforced concrete (HSC) columns with an eccentricity of 50 mm from the center (e/h = 0.5) using ABAQUS. For this purpose, nine short HSC columns were used after they strengthened with carbon fiber reinforced polymer (CFRP) sheets in various schemes and tested experimentally in terms of their ultimate strengths and complete response to the load-vertical deflections obtained from a previous research paper under publication to be used to check the integrity of the arithmetic results. Further parameters were then investigated using the verified model, such as the influence of extra CFRP layers, different load eccentricities (e/h), and initial loading ratios. Through rapprochement in the values of both the ultimate load and deflections, the numerical analysis demonstrated a high level of accordance with the experimental findings. Results also showed that increasing the number of CFRP sheets for specimens strengthened comprehensively with CFRP laminates in both transverse and longitudinal directions increased significantly the ultimate load capacity. At the same time, by decreasing the eccentricity ratio (e/h), the maximum strength and deflections for all specimens strengthened fully or partially with CFRP sheets were enhanced. Indeed, the results showed that increasing the initial loading ratios of the strengthened samples led to a decrease in the ultimate load.
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