| 无粘结部分预应力筋极限应力增量评析 |
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| 引用本文： | 汤永净,程付扬.无粘结部分预应力筋极限应力增量评析[J].工业建筑,2009(Z1). |
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| 作者姓名： | 汤永净 程付扬 |
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| 作者单位： | 同济大学地下建筑与工程系同济大学岩土及地下工程教育部重点实验室; |
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| 摘 要： | 介绍了无粘结预应力筋极限应力增量的研究现状,收集了国内外141根无粘结部分预应力混凝土梁(板)试验数据,分析了JGJ/T 92-93,JGJ 92-2004《无粘结预应力混凝土结构技术规程》极限应力增量的优缺点,在对试验数据计算分析的基础上,提出Δσp=120 MPa的观点,同时验证了JGJ 92-2004计算模式的合理性。最后得出配置高强非预应力钢筋的无粘结预应力受弯构件预应力增量极限值可以使用JGJ 92-2004极限应力增量公式计算。
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| 关 键 词： | 无粘结 极限应力增量 |
THE ANALYSIS OF ULTIMATE STRESS INCREMENT FOR PARTIALLY PRESTRESSED WITH UNBONDED TENDONS |
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| Tang Yongjing Cheng Fuyang.THE ANALYSIS OF ULTIMATE STRESS INCREMENT FOR PARTIALLY PRESTRESSED WITH UNBONDED TENDONS[J].Industrial Construction,2009(Z1). |
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| Authors: | Tang Yongjing Cheng Fuyang |
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| Affiliation: | Department of Geotechnical Engineering;Tongji University;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education;Shanghai 200092;China |
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| Abstract: | The study on ultimate stress increase for prestressed with unbonded tendons is introduced at first,Collecting the experimental data on 141 unbonded partially prestressed concrete beams(boards) in domestic and foreign countries were collected to analyze the merits and demerits of the ultimate stress increment soecified by the technical specification for concrete structures prestressed with unbonded tendons(JGJ/T 92-93 and GJ 92-2004),Δσ_p=120 MPa was proposed based on computing and analyzing the experimental data,and rationality of the JGJ 92-2004 computation pattern was confirmed simultaneously.The conclusion is that GJ 92-2004 is possible to calculate the unbonded partially prestressed concrete beams(boards) with high strength non-prestressed reinforcement. |
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| Keywords: | unbonded ultimate stress increment |
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