| 大跨度斜拉桥施工阶段主梁的立模标高研究 |
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| 引用本文： | 谭红霞,陈政清.大跨度斜拉桥施工阶段主梁的立模标高研究[J].湖南大学学报(自然科学版),2007,34(8):6-10. |
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| 作者姓名： | 谭红霞 陈政清 |
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| 作者单位： | 1. 湖南大学,土木工程学院,湖南,长沙,410082;湘潭大学,土木工程与力学学院,湖南,湘潭,411105
2. 湘潭大学,土木工程与力学学院,湖南,湘潭,411105 |
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| 摘 要： | 以某大跨度预应力混凝土斜拉桥为例,采用一阶分析及最优化计算方法来确定斜拉桥的合理施工状态.运用空间非线性有限元分析模型,模拟了混凝土斜拉桥主梁的悬臂浇筑过程,求出各施工阶段斜拉索的初始张拉力和主梁节段的立模标高.研究结果表明,这种方法能将成桥后结构的内力和主梁的线形同时控制在精度范围内.
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| 关 键 词： | 斜拉桥 施工过程 一阶分析法 预抛高值 |
| 文章编号： | 1000-2472（2007）08-0006-05 |
| 修稿时间： | 2006-10-16 |
Study on the Initialize Heights of Girders in Construction State for a Long-span Prestressed Concrete Cable-stayed Bridge |
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| TAN Hong-xi,CHEN Zheng-qing.Study on the Initialize Heights of Girders in Construction State for a Long-span Prestressed Concrete Cable-stayed Bridge[J].Journal of Hunan University(Naturnal Science),2007,34(8):6-10. |
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| Authors: | TAN Hong-xi CHEN Zheng-qing |
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| Institution: | 1. College of Civil Engineering,Hunan Univ, Changsha, Hunan 410082,China; 2. College of Civil Engineering and Meehanies, Xiangtan Univ, Xiangtan, Hunan 411105, China |
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| Abstract: | Based on a long-span prestressed concrete cable-stayed bridge of a 370m central span length under construction in China,This paper introduces firstorder solution and optimization algorithm to determine the rational construction state.Applying a spatial nonlinear FEM modeling,the actual cantilever construction process of the cable-stayed bridge concrete girders was simulated,the tension forces of cables and the initialize heights of girders during construction are obtained respectively.The research results show that this method could control the stress of the construction and the line shape of the girder in accurate range at the same time. |
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| Keywords: | cable-stayed bridges construction process first-order solution initialize height |
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