| 大跨开口薄壁钢箱梁顶升试验受力特性分析 |
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| 引用本文： | 陈广生,王立彬,顾祝仙.大跨开口薄壁钢箱梁顶升试验受力特性分析[J].南京工程学院学报(自然科学版),2014(4):54-59. |
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| 作者姓名： | 陈广生 王立彬 顾祝仙 |
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| 作者单位： | 1. 南京林业大学,江苏南京,210037
2. 南京国博土木工程技术有限公司,江苏南京,211101 |
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| 摘 要： | 为研究大跨度开口薄壁钢箱梁顶升时局部受力特性,依据实际工程试验模型建立钢箱梁三维精细化有限元模型.基于空间受力分析确定顶升方案,并与现场试验结果进行对比分析.结果表明:开口薄壁钢箱梁的抗扭刚度较小,悬臂端倒角处易出现应力集中;通过加劲肋的约束和加固作用,局部变形可得到很好控制.
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| 关 键 词： | 开口薄壁截面 大跨度 钢箱梁 顶升 |
Analysis of Characteristics of Large Span Thin-Walled Steel Box Girder with Open Section on Jacking-up |
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| CHEN Guang-sheng,WANG Li-bin,GU Zhu-xian.Analysis of Characteristics of Large Span Thin-Walled Steel Box Girder with Open Section on Jacking-up[J].Journal of Nanjing Institute of Technology :Natural Science Edition,2014(4):54-59. |
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| Authors: | CHEN Guang-sheng WANG Li-bin GU Zhu-xian |
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| Institution: | CHEN Guang-sheng, WANG Li-bin, GU Zhu-xian (1. Nanjing Forestry University, Nanjing 210037, China; 2. Nanjing GuoBo civil Engineering Technology Ltd. Co., Nanjing 211101, China) |
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| Abstract: | To study local mechanical characteristics of large span thin-walled steel box girder with open section on jacking-up,a three-dimension refined finite element model for steel box girders is built according to the actual engineering test model.Based on space structural analysis,jacking-up test scheme is determined,the results of which are compared and studied with those of field tests.The results show that the torsional stiffness of thin-walled steel box girder with open section is relatively small,and that the stress is more likely to be concentrated at the end of the cantilever local deformation can be well under control by using stiffeners which play the role of reinforcing and constraining. |
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| Keywords: | thin-walled beam with open section large span steel box girder jacking-up |
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