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Cyclic Behavior of RC Beam-Column Joints Made with Sustainable Concrete

This research investigates the behavior of unconfined RC connections made with sustainable concrete under cyclic loading. Different types of sustainable concrete are used where cement is partially replaced by silica-fume, iron filing and pulverized fuel ash using two different percentages 15% and 20%. The numerical finite element model, which simulates the cyclic behavior of RC connections, is verified using the experimental results and can reasonably predict joint response and its damage pattern. Test results have shown that beam-column connections made with iron filings-concrete are significantly damaged when exposed to cyclic loading while others made with silica fume concrete and fuel ash-concrete are stronger and experience minor cracks. Increasing cement replacement percentage from 15% to 20% for any waste material reduces sustainable concrete compressive strength and weakens the joint.