| 湿度对连续箱梁收缩和徐变的影响研究 |
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| 引用本文： | 高俊青,刘珊,刘耘,高金东.湿度对连续箱梁收缩和徐变的影响研究[J].低温建筑技术,2013(11):1-4. |
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| 作者姓名： | 高俊青 刘珊 刘耘 高金东 |
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| 作者单位： | [1]中铁二十一局,乌鲁木齐830026 [2]乌鲁木齐城市轨道集团有限责任公司,乌鲁木齐830026 [3]新疆大学建筑工程学院,乌鲁木齐830047 |
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| 基金项目： | 中铁二十一局科技计划项目（13A-2）;新疆大学横向课题 |
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| 摘 要： | 依托新疆某高速立交连续梁大桥施工工程,利用MIDAS/Civil软件建立主梁有限元模型,研究了不同环境年平均相对湿度对因混凝土收缩、徐变引起的主梁变形与箱梁顶、底板应力的影响.结果表明,主梁混凝土的收缩和徐变均与环境年平均相对湿度有关,混凝土收缩引起的应力要比徐变引起的应力值大,徐变引起的主梁变形比收缩引起的变形明显,环境年平均相对湿度越低,主梁变形值越大.
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| 关 键 词： | 连续箱梁桥 仿真分析 收缩和徐变 |
THE RESEARCH OF HUMIDITY ON EFFECTS OF CREEP AND SHRINKAGE OF CONTINUOUS BOX GIRDER |
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| GAO Jun-qingI LIU Shan,LIU Yun,GAO Jin-dong.THE RESEARCH OF HUMIDITY ON EFFECTS OF CREEP AND SHRINKAGE OF CONTINUOUS BOX GIRDER[J].Low Temperature Architecture Technology,2013(11):1-4. |
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| Authors: | GAO Jun-qingI LIU Shan LIU Yun GAO Jin-dong |
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| Affiliation: | 3 (1. Company of China Railway No. 21 Bureau ,Urumqi 830026, China; 2. Urumqi City Rail Group Co. , Ltd. , Urumqi 830026, China; 3. Institute of Architectural Engi. ,Xinjiang Univ. , Urimqi 830047, China) |
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| Abstract: | Based on the construction of one continuous beam bridge in Xinjiang,this paper analyzes the effect of annual average relative humidity of the environment on the concrete girder shrinkage and creep deformation and stress of box girder roof and base by establishing finite element model of construc- tion process by using the bridge engineering software MIDAS/Civil. The results show that： concrete gird- er shrinkage and creep are related to annual average relative humidity of environment, the stress caused by concrete shrinkage is larger than by creep, the deformation of girder caused by concrete creep is more obviously than by shrinking. The lower annual average relative humidity of the environment, the larger the deformation of girder. |
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| Keywords: | continuous beam box bridge simulation analysis shrinkage and creep |
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