Effect of interfacial strength on bending properties of reinforced concrete beams

Abstract

By taking into consideration of meso-scopic level, four-point bending numerical model of different interfaces was established to analyze the effect of interfacial strength on the bending properties of reinforced concrete beams with the diagrams of crack pattern, the load-step curve and the cumulative AE-loading step curve. The experimental result shows that the peak load, the cracking load and the stiffness before cracking increase with the interfacial strength. Furthermore, the specimen with strong interface presents high brittleness during the failure process, while both bearing capability and ductility could be found in the specimen with moderate interfacial strength.

Keywords

reinforced concrete / interfacial strength / peak load / acoustic emission

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