Fracture mechanical analysis of strengthened concrete tension members with one crack
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A concrete tension member strengthened with fiber reinforced polymer plates on two sides is analyzed with non-linear fracture mechanics. The analysis of the strengthened tension member incorporates cohesive properties for both concrete and interface between concrete and strengthening medium, and results in closed form solutions for the load-crack opening relationship. To distinguish between single and multiple cracking in a design process, structural classification parameters are derived. The minimum reinforcement ratio for obtaining multiple cracking derived from the structural classification parameters, is investigated in a non-dimensional analysis, and found to depend strongly on the ratio between interfacial and concrete fracture energies.
KeywordsConcrete Fiber reinforced materials Cohesive zone modeling Fracture mechanics Crack growth Debonding Interface fracture Bonded joints
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