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总结了国内外关于无粘结预应力钢筋的极限应力的研究现状 ,针对我国行业标准《无粘结预应力混凝土结构技术规程》中 ,对无粘结预应力钢筋的极限应力设计取值的规定的不足 ,根据大量的试验数据 ,提出了适用于桥梁工程的无粘结预应力混凝土上部结构多种截面无粘结筋极限应力增量的实用简化计算方法 ,补充了《规程》的不足 ,拓宽了《规程》中公式的适用范围。
The research status of the ultimate stress of unbonded prestressed reinforced bar at home and abroad is summarized. According to the stipulation of the ultimate stress design value of unbonded prestressed reinforced bar in China’s industry standard “Technical Specification of Unbonded Prestressed Concrete Structure” According to a large number of test data, a practical and simplified calculation method for the ultimate stress increment of unbonded tendons in various cross-sections of unbonded prestressed concrete superstructures for bridge engineering is proposed based on a large amount of experimental data, which complements the deficiencies of “rules” and widens The “rules” in the scope of the formula.