[1]刘立新,安鸿飞,于秋波,等.淮河大桥35 m先张折线形箱梁预应力损失的研究[J].郑州大学学报(工学版),2007,28(04):12-15.[doi:10.3969/j.issn.1671-6833.2007.04.004]
LIU Lixin,An Hongfei,YU Qiubo,et al.Study on prestress loss of 35 m pre-tensioned linear box girder of Huaihe River Bridge[J].Journal of Zhengzhou University (Engineering Science),2007,28(04):12-15.[doi:10.3969/j.issn.1671-6833.2007.04.004]
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淮河大桥35 m先张折线形箱梁预应力损失的研究(
)
《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]
- 卷:
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28卷
- 期数:
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2007年04期
- 页码:
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12-15
- 栏目:
-
- 出版日期:
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1900-01-01
文章信息/Info
- Title:
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Study on prestress loss of 35 m pre-tensioned linear box girder of Huaihe River Bridge
- 作者:
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刘立新; 安鸿飞; 于秋波; 等.
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郑州大学,土木工程学院,河南,郑州,450001, 郑州大学,土木工程学院,河南,郑州,450001;郑州大学,综合设计研究院,河南,郑州,450002
- Author(s):
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LIU Lixin; An Hongfei; YU Qiubo; etc
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- 关键词:
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先张折线; 张拉横梁; 反力梁; 转向器; 预应力
- Keywords:
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- DOI:
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10.3969/j.issn.1671-6833.2007.04.004
- 文献标志码:
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A
- 摘要:
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通过对35 m折线先张梁施工监测,来分析张拉横梁、反力梁的变形和转向器摩擦阻力对预应力损失的影响,以及其他情况下预应力损失.结果表明:先张折线形预应力箱梁的预应力损失的计算比后张法预应力损失的计算更准确,避免了预应力值不可靠带来的工程病害,而且先张折线形箱梁总的预应力损失值比后张法的预应力损失值要小,确保了张拉应力.分析指出混凝土的收缩和徐变引起受拉区和受压区的应力损失在先折线形箱梁总预应力损失的比重最大,所以采取办法减小混凝土的收缩和徐变是控制先张折线形箱梁总预应力损失的有效措施.
- Abstract:
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Through the construction monitoring of the 35 m folded line first tension beam, the influence of the deformation of the tension beam and the reaction beam, the frictional resistance of the steering gear on the prestress loss, and the prestress loss under other conditions were analyzed. The results show that the calculation of prestress loss of prestressed box girder is more accurate than that of post-tensioned prestress method, which avoids engineering diseases caused by unreliable prestress value, and the total prestress loss value of prestressed linear box girder is smaller than that of post-tensioned method, which ensures the tensile stress. The analysis shows that the stress loss caused by shrinkage and creep of concrete in the tensile area and compression zone has the largest proportion of the total prestress loss of the pre-tensioned linear box girder, so it is an effective measure to control the total prestress loss of the pre-tensioned linear box girder by reducing the shrinkage and creep of concrete.
更新日期/Last Update:
1900-01-01