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The Shear Paradox

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In this talk we discuss the findings of a recent study on reinforced concrete elements subjected to shear. Starting from a prismatic reference geometry, a preferential internal load-path was progressively isolated. Volumes of concrete that were not part of this resisting mechanism were replaced with a low-strength concrete, or left unfilled. This led to a net increase in overall resistance and ductility of the specimens. The removal of material from the structure, and the decrease in material strength in some regions of the structure, strengthened it. This paradox and the counter-intuitive results of the study are explained with new concepts such as ‘shear compliance’ and ‘engineered crack propagation’, but also through the analysis of historical structures.

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Meeting ID: 846 4716 0140 Passcode: 153130

This talk is part of the Engineering Department Structures Research Seminars series.

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