基于统一强度理论的FRP约束RC柱承载力分析

Ultimate bearing capacities analysis of reinforced concrete columns combined with FRP based on unified strength theory

基于统一强度理论,对FRP约束钢筋混凝土柱在轴向荷载作用下的力学性能进行了理论分析,得到了FRP约束钢筋混凝土柱承载力计算的统一公式,计算时可不再区分FRP材料的种类。并且在圆形截面承载力研究的基础上,采用面积等效、考虑混凝土强度折减系数的方法,得到了方形截面的FRP约束钢筋混凝土柱承载力公式。与有关文献的试验数据进行比较,结果基本一致。说明统一强度理论对于FRP约束钢筋混凝土柱承载力的理论计算有非常好的适用性,为FRP约束钢筋混凝土柱的研究提供了一定的理论依据。

Based on the unified strength theory,the mechanics performance of the reinforced concrete columns combined with FRP bearing the axial loads was analyzed,and the unified formula for calculating the ultimate bearing capacities of reinforced concrete columns combined with FRP was deduced,which can be applied to all kinds of FRP.Considering the factors of area equivalent and the reduction of concrete strength,the formula for square cross-section were deduced.A reasonable match was reached by comparing the results calculated by formula with the experimental results.The results prove that the unified strength theory has a good applicability in calculating the ultimate bearing capacities for reinforced concrete columns combined with FRP.And the solution has an important value in analysis of reinforced concrete columns combined with FRP.