【摘要】 介绍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公式 ,补充了《规程》的不足 ,拓宽了《规程》中公式的适用范围更多还原

【Abstract】 The present status of the reinforcing ultimate stress researches at home and abroad. According to the shortcoming in the present code, baseed on the test result, a reinforcing ultimate stress formula is established for various cross-section in the bridge construction. The suggested formulas are verified with the experinented results.更多还原