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从高强钢绞线网-聚合物砂浆加固层与混凝土构件之间的粘结破坏层出发,分析了高强钢绞线网-聚合物砂浆加固的RC梁端部剥离破坏机理,结合已有的试验研究,考虑各种应力的综合作用效应,提出了集中荷载和均布荷载作用下端部剥离破坏正应力计算公式、剪应力计算公式;同时,基于粘结破坏层的剪切粘结强度和正拉粘结强度,提出了端部剥离破坏准则;最后建立了剥离承载力计算公式,并和试验数据进行了对比。结果表明:公式计算值与试验结果符合良好,可用于实际工程计算。
Based on the bond failure layer between high-strength steel wire mesh-polymer mortar reinforced concrete and concrete, the mechanism of peeling-off of RC beams strengthened by high-strength steel wire mesh-polymer mortar was analyzed. Based on the existing tests Based on the comprehensive effect of all kinds of stresses, the calculation formulas of normal stress and shear stress of end-peel failure under concentrated load and uniform load were put forward. At the same time, based on the shear bond strength and the positive pull-pull The strength of the joint, the criterion of end peeling failure was proposed. Finally, the calculation formula of the peel bearing capacity was established and compared with the experimental data. The results show that the calculated values are in good agreement with the experimental results and can be used in actual engineering calculation.