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建议了FRP(纤维增强塑料)布环向约束钢筋混凝土偏心受压柱的简化轴力-弯矩相关曲线(Nu-Mu曲线)的建立方法,参照《混凝土结构设计规范》(GB 50010—2010)的正截面承载力计算基本假定,得到了简化Nu-Mu曲线的关键控制点,并通过相关试验结果验证了采用简化Nu-Mu曲线验算FRP布环向约束钢筋混凝土偏心受压柱承载力的合理性,并给出了利用简化Nu-Mu曲线进行FRP布环向约束加固钢筋混凝土偏心受压柱的设计流程以及设计建议。研究结果表明,通过该简化曲线可以较好地计算FRP布环向约束钢筋混凝土偏心受压柱的承载力,且计算过程简单,能够满足工程结构加固设计要求,为我国相关规范的修订提供有益参考。
The simplified axial force-moment curve (Nu-Mu curve) method is proposed for FRP (Fiber Reinforced Plastics) cloth ring constrained reinforced eccentric compression column. Refer to “Design Code for Concrete Structure” (GB 50010-2010) , The key control points for simplified Nu-Mu curve are obtained. The results of the relevant tests verify the reasonableness of using the simplified Nu-Mu curve to check the bearing capacity of FRP cloth ring restrained eccentric load-bearing columns In addition, the design flow and design proposal of using the simplified Nu-Mu curve to reinforce the eccentric compression column of reinforced concrete (CFR) under cyclic constraint of FRP cloth are given. The results show that the simplified curve can be used to calculate the bearing capacity of CFRP ring constrained eccentrically pillared column, and the calculation process is simple, which can meet the design requirements of structural reinforcement and provide useful reference for the revision of relevant norms in our country .