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我国现行《混凝土结构设计规范》(GB 50010—2010)对配有预应力钢筋的受弯构件,其正截面承载能力计算公式取与普通钢筋混凝土受弯构件一样;其斜截面承载能力的计算公式中由预加力所提高的构件受剪承载力计算值统一取0.05N_pe。本文详细阐述了该计算公式中的不妥之处,并提出简化的计算公式。
China’s current “Code for Design of Concrete Structures” (GB 50010-2010) for the flexural members with prestressed reinforcement, the formula for carrying capacity of normal section is the same as ordinary reinforced concrete flexural members; In the increase by the pre-stressed members of the shear strength of the unified value of 0.05N_pe. This article elaborates on the inadequacies in this formula and presents a simplified formula.