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在4根预应力CFRP板加固混凝土梁试验研究的基础上,通过平截面假定以及材料应力应变本构关系进行推导,提出根据确定的目标延性系数反算CFRP板加固面积或初始张拉控制应力的计算方法。计算结果与试验结果比较,计算方法具有良好的适用性,可为实际工程中进行预应力CFRP板加固混凝土梁设计提供参考。
Based on the experimental research of four prestressed concrete beams strengthened with CFRP plates and deduced from the assumption of the plane cross-section and the constitutive relation of the material stress-strain, the paper proposes to calculate the reinforcement area or initial tension control stress of the CFRP board according to the determined target ductility coefficient Calculation method. Comparing the calculated result with the test result, the calculation method has good applicability and can provide a reference for the design of concrete beams strengthened with prestressed CFRP sheets in practical engineering.