外包活性粉末混凝土加固钢结构的应用研究

Application analysis of reinforced steel structure with reactive powder concrete

采用高强度、高密实性的活性粉末混凝土对钢结构进行加固,能极大提高构件的承载力,使活性粉末混凝土和钢结构的高强度特性得以共同发挥,同时大大提高钢结构构件的耐火性能和抗腐蚀能力,进一步降低加固钢结构的后期维护成本。介绍了现有的相关试验研究成果,根据活性粉末混凝土材料的特性对现有的规范公式进行了修正,得到了外包活性粉末混凝土加固钢结构的轴心受压承载力、正截面受弯承载力、斜截面受剪承载力计算公式。与试验数据对比后可知,修正公式的计算结果与试验结果吻合较好,可作为采用外包活性粉末混凝土方法加固钢结构的设计计算依据。

Using reactive powder concrete with high strength, high density to reinforce the steel structure can greatly improve the bearing capacity of components, give full play to the features of high strength of reactive powder concrete and steel structure, at the same time greatly improve refractory performance and corrosion resistance of steel structure components, and further reduce the reinforced steel structure in the late maintenance costs.The relevant experimental results were introduced.According to the properties of reactive powder concrete material, the formula for calculating the bearing capacity of steel structures reinforced with reactive powder concrete was obtained, including axial compression capacity, bending capacity of normal section and shear capacity of inclined section.Compared with the experimental data, the calculated results of the modified formula are in good agreement with the experimental results, which can be used as the basis for the design and calculation of the reinforcement of steel structures by using reactive powder concrete.