| 部分预应力混凝土梁无粘结筋极限应力的研究 |
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| 引用本文： | 杜拱辰,陶学康.部分预应力混凝土梁无粘结筋极限应力的研究[J].建筑结构学报,1985,6(6):2-13. |
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| 作者姓名： | 杜拱辰 陶学康 |
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| 作者单位： | 中国建筑科学研究院
,中国建筑科学研究院 |
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| 摘 要： | 本文研究非预应力粘结钢筋对受弯的部分预应力混凝土梁中无粘结束极限应力的影响。试验研究了22根无粘结和4根有粘结部分预应力梁在三分点荷载作用下的抗弯性能。试验结果表明无粘结束中的应力主要取决于无粘结束和有粘结非预应力筋两者的配筋指标之和。用弯矩-曲率法分析结果与试验结果符合良好。最后给出了一个计算无粘结束极限应力的经验公式。
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| 收稿时间： | 1985-12-05 |
| 修稿时间： | 1985-12-05 |
A Study of the Ultimate Stress of Unbonded Tendons in Partially Prestressed Concrete Beams |
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| Du Gongchen Tao Xuekang.A Study of the Ultimate Stress of Unbonded Tendons in Partially Prestressed Concrete Beams[J].Journal of Building Structures,1985,6(6):2-13. |
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| Authors: | Du Gongchen Tao Xuekang |
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| Affiliation: | Du Gongchen Tao Xuekang( China Academy of Building Research ) |
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| Abstract: | This paper studies the effect of varying amount of nonprestress-ed reinforcement on the ultimate stress of unbonded prestressing tendons in flexure of partially prestressed concrete beams. The study was both experimental and analytical. 22 partially prestressed concrete beams with unbonded tendons and 4 with bonded tendons were tested. Test results show that the stress in unbonded tendons in flexure of beams is a function of the reinforcement indices of both the unbonded tendons and the bonded nonprestressed reinforcement.The analytical results agree well with the experimental results.An empirical equation, for estimating the ultimate stress in unbonded tendons is proposed in the paper. |
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