基于共同屈服的普通钢筋体外预应力加固RC梁理论与试验研究

Theoretical and experimental study on external prestressing strengthening RC beams with ordinary rebar based on simultaneous yielding

对普通钢筋体外预应力加固RC梁受弯性能进行了研究,推导基于体外钢筋与体内钢筋共同达到屈服时,初始张拉力与原梁初始受力和屈服荷载增量及体外筋面积的关系及计算方法,并结合试验与该计算方法进行对比,对比表明,理论与试验结果吻合良好。

In this paper,the bending behavior of RC beams strengthened by external prestressing with ordinary steel bars is studied. The relationship between the initial tensile force and the stress of initial rebars and yield load increment of the beam and the area of the external rebars is calculated based on simultaneous yielding. Combined with the test and the calculation method,the comparison shows that the theory agrees well with the experimental results.