中文摘要：

采用桁架模型,分析钢丝绳在加固中的受力机理,提出一种预应力钢丝绳箍加固钢筋混凝土梁抗剪承载力计算方法.研究结果表明：所提出公式的计算结果与试验结果吻合良好,可用于计算闭合预应力钢丝绳箍加固钢筋混凝土梁抗剪承载力;采用桁架模型计算钢丝绳抗剪承载力时,应考虑混凝土抗剪承载力和钢丝绳极限强度折减.此外,通过与美国混凝土结构规范ACI 318-05建议公式的计算结果相比,表明所得钢丝绳加固RC梁抗剪承载力吻合程度高.

英文摘要：

Using truss model,the theoretical analysis was conducted to study the mechanism of steel wire in strengthening,and a model to predict shear capacity of reinforced concrete beams strengthened with prestressed wire stirrups was put forward.The calculation results agree well with the experimental ones,and the results obtained by code ACI 318-05 are conservative,therefore this model can be used to calculate the shear capacity of beam strengthened with prestressed wire stirrups,and the reduction of concrete shear bearing capacity and the ultimate strength of steel wire would be taken into consideration.