论文部分内容阅读
为了研究条带式FRP约束加固混凝土方柱的轴心受压承载性能和工作机理,对3组(12个)FRP约束混凝土方柱试件进行了试验研究和受力机理分析,基于极限平衡法推导出了FRP约束混凝土方柱的承载力计算模型,计算结果与试验值基本一致。揭示了FRP约束混凝土方柱的工作机理,约束区域分为强约束区和弱约束区,借助试验结果和FRP约束刚度回归出了强约束区混凝土的极限抗压强度计算公式,考虑FRP种类、条带间距和宽度给出了FRP约束方柱的极限承载力计算方法。
In order to study the axial compressive loading behavior and working mechanism of the reinforced concrete square columns with strip-type FRP restraint, three groups of (12) FRP-confined concrete square columns were tested and analyzed by force mechanism. Based on the limit equilibrium method The calculation model of bearing capacity of FRP-confined concrete square columns is deduced. The calculation results are basically consistent with the experimental values. The working mechanism of the square columns with FRP confined concrete is revealed. The confined areas are divided into strong constrained areas and weak constrained areas. The formulas for calculating the ultimate compressive strength of concrete in strongly confined areas are obtained by the test results and FRP restraint stiffness. Considering the types of FRP, The method of calculating the ultimate bearing capacity of FRP-constrained square columns is given with the spacing and width.