Abstract
The bending tests of 2 control beams and 6 damaged beams strengthened with CFRP (DBSC) were carried out to study the effects of adhesive layer thickness, number of CFRP layers and reinforcement ratio on crack characteristics of DBSC. The test results show that the crack development of the DBSC is accelerated and the crack resistance of the DBSC is reduced compared with the intact beam. With the increase of the thickness of the adhesive layer, the crack development of the DBSC is slowed down and the crack resistance is improved. Increasing the number of CFRP layers is helpful to restrain the crack development of DBSC under high load level. The increase of reinforcement ratio can significantly improve the crack resistance of DBSC.
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