钢筋混凝土薄腹梁体外预应力下撑式钢拉杆加固中,测量张拉高度v不易实现。利用张拉高度与钢拉杆的几何关系,将张拉高度转换为钢拉杆轴向应变和薄腹梁跨中竖向位移,在加固施工时对应变和位移双重监控,效果良好,对同类结构加固有参考价值。 Reinforced concrete thin girder external prestressed under steel brace reinforcement, measuring the height of the tension v is not easy to achieve. By using the geometric relationship between the tension height and the steel tie rod, the tension height is converted into the axial strain of the steel tie rod and the mid-span vertical displacement of the thin girder. During the reinforcement construction, the double monitoring of strain and displacement is effective with good reinforcement of similar structures A reference value.