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在我国现行《无粘结预应力混凝土结构技术规程》(JGJ/ T92 - 93)的建议公式基础上 ,结合国内外已有试验数据 ,提出了无粘结预应力筋极限应力计算公式 ,并结合概率和数理统计知识 ,对所提公式进行分析研究 ,证明了该公式具有一定保证率 ,可用于工程设计计算中 ;同时 ,还推荐了美国学者A.E.Naaman等提出的无粘结预应力筋极限应力公式 ,该公式计算虽较为复杂 ,但有较高的计算精度 .
Based on the proposed formula of “Technical Specification of Unbonded Prestressed Concrete Structure” (JGJ / T92-93) in our country and based on the existing experimental data both at home and abroad, the formulas for calculating ultimate stress of unbonded prestressed tendons are proposed and combined Probability and mathematical statistics, the proposed formula is analyzed and studied to prove that the formula has a certain guarantee rate, which can be used in engineering design calculation; also recommended the American scholar AENaaman et al proposed unbonded prestressed tendon ultimate stress Formula, although the formula is more complicated, but a higher accuracy.