Mesoscopic Simulation of FRP-Concrete Single Shear Test Considering Roughness
A mesoscopic finite element model of fiber reinforced polymer(FRP)-concrete single shear test is developed considering the roughness of the concrete surface,and taking the concrete as a composite composed of mortar and aggregate.In order to describe the damage failure process of FRP-concrete interface in single shear test,the plastic damage model and linear elastic model are,respectively,used to simulate the mechanical behaviors of the two phases of concrete and FRP.To reveal the influence of concrete surface roughness on the failure process of FRP-concrete single shear test,two-dimensional random rough surfaces with root mean square height of 0.4 mm and 0.8 mm are generated.The results show that the established mesoscopic finite element model can effectively simulate the damage failure process of FRP-concrete interface in the single shear test,and the obtained load-displacement curve and failure mode are in good agreement with the test results.With the increase of the surface roughness of concrete,the effect of mechanical interlocking between epoxy resin and concrete surface increases,and the load-bearing capacity of the FRP-concrete specimen also becomes larger.
FRP-concrete single shear testmesoscopic simulationrandom aggregate model2D random rough surface
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