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开展了7片T梁的碳纤维布加固、体外预应力筋加固、二者结合加固(国内首次)的对比试验,结果表明二者结合加固的方法能更大程度地提高构件承载力、减小挠度,在加载过程中碳纤维布和体外预应力筋先后发挥作用.通过312国道信阳公跨铁立交桥加固工程的实例分析可以看出,二者结合加固能有效降低旧桥主拉应力、减小裂缝宽度.图23,表3,参8.
Seven T-beams were reinforced with carbon fiber sheets and reinforced by external prestressing tendons. The comparison test between the two was conducted for the first time in China. The results show that the combination of the two can greatly improve the bearing capacity and reduce the deflection , During the loading process carbon fiber cloth and external tendons have played a role.Through the 312 State Road Xinyang Public Railway overpass reinforcement project instance analysis shows that the combination of the two can effectively reduce the tensile stress of the old bridge and reduce the width of the crack Figure 23, Table 3, Reference 8.