| 对预应力混凝土结构的几点认识与建议 |
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| 引用本文： | 郑文忠,王英,郝燕茹.对预应力混凝土结构的几点认识与建议[J].哈尔滨建筑大学学报,2001,34(2):12-15. |
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| 作者姓名： | 郑文忠 王英 郝燕茹 |
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| 作者单位： | 1. 哈尔滨工业大学土木工程学院,
2. 哈尔滨市建筑设计院, |
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| 基金项目： | 黑龙江省科委青年基金资助项目!（Q98－12），黑龙江博士后科学研究基金资助项目 |
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| 摘 要： | 论述了顺应力筋两阶段工作原理，认为可以将预应力的工作成分两个阶段，将预应力混凝土结构分成了侧限和无侧限两大类，提出了侧限影响系数的概念，基于预应力筋两阶段工作原理，建立了无侧限及有侧限预应力的混凝土结构的承载能力计算公式，提出了既能为工程界所接受，又能满足耐久性要求的预应力混凝土结构裂缝控制及验算建议，建立了通过裂缝控制计算确定预应力筋用量，通过承载力方程和构造要求计算确定非预应力筋用量的两类极限状态的直接设计方法。
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| 关 键 词： | 预应力混凝土结构 张拉 有效预应力 承载力 裂缝控制 |
| 文章编号： | 1006-6780(2001)02-0012-04 |
| 修稿时间： | 1999年11月9日 |
Thoughts about prestressed concrete structures |
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| ZHENG Wen-zhong,WANG Ying,HAO Yan-ru.Thoughts about prestressed concrete structures[J].Journal of Harbin University of Civil Engineering and Architecture,2001,34(2):12-15. |
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| Authors: | ZHENG Wen-zhong WANG Ying HAO Yan-ru |
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| Abstract: | Presents the two-stage-working principle established for prestressed steel by which,prestressed steel is positive at the first stage and equivalent loads steel are regarded as external loads (or dead loads), and at the second stage, prestressed steel is only a kind of material that resists passively external loads just as a common steel, and prestressed concrete structures can essentially be classified into lateral restraint struetures and non-lateral restraint structures, and the ultimate loadcarrying capacity formula established for non-lateral restraint prestressed concrete structures and lateral restraint prestressed concrete structures, and discusses possible ways of control and check in prestressed concrete structures. |
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| Keywords: | prestress concrete structures stretch effective prestress lateral restraint ultimate loadcarrying capacity controlling cracks |
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