| 预应力混凝土连续箱梁桥的空间分析 |
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| 引用本文： | 王战国.预应力混凝土连续箱梁桥的空间分析[J].城市道桥与防洪,2011(9):57-60,320,321. |
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| 作者姓名： | 王战国 |
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| 作者单位： | 宁波杭州湾新区开发建设有限公司,浙江宁波,315000 |
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| 摘 要： | 采用有限元法对一座三跨预应力混凝土连续箱梁桥进行了空间分析,静载及动载试验测试结果表明模型的正确性,并对主梁三个测试截面的剪力滞效应进行了研究。试验中发现跨中截面箱梁底板出现了众多的纵向裂缝,研究发现全桥纵向力筋配置过多,泊松比效应明显,而设计中未采用横向预力筋,横向应力过大是造成底板混凝土开裂的主要原因,而在相应位置增加横隔板可以显著提高横向抗弯刚度。对同类桥的设计具有参考价值。
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| 关 键 词： | 预应力混凝土连续梁 有限元法 剪力滞 纵向裂缝 |
Space Analysis of Prestressed Concrete Continuous Box Beam Bridge |
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| Wang Zhanguo.Space Analysis of Prestressed Concrete Continuous Box Beam Bridge[J].Urban Roads Bridges & Flood Control,2011(9):57-60,320,321. |
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| Authors: | Wang Zhanguo |
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| Affiliation: | Wang Zhanguo |
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| Abstract: | The finite element method is used to carry out the space analysis of a three-span prestressed concrete continuous box beam bridge.The results of static loading and dynamic loading tests make clear the correctness of the model.The article studies the shear lag effects of three tested sections of the main beam.In the experiment,the numerous longitudinal cracks are found on the bedplate of sectional box beam in the middle of span.The study finds that too many longitudinal tendons are collocated in the whole br... |
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| Keywords: | prestressed concrete continuous beam finite element method shear lag longitudinal crack |
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