| 大型屋顶网壳结构稳定性分析及实时评估策略 |
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| 引用本文： | 李功标,瞿伟廉. 大型屋顶网壳结构稳定性分析及实时评估策略[J]. 武汉科技大学学报(自然科学版), 2007, 30(4): 416-419 |
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| 作者姓名： | 李功标 瞿伟廉 |
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| 作者单位： | 武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北,武汉,430070 |
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| 摘 要： | 进行了大型屋顶网壳结构的非线性屈曲分析，提出了支撑钢牛腿失效后网壳结构稳定性的实时评估策略。在有限元分析中，对于结构中的主桁架梁采用梁单元，对其他构件采用空间杆单元来模拟，并采用柱面弧长法来跟踪结构的屈曲平衡路径。结构分析中仅考虑结构的自重和风荷载。计算风荷载时，结构上的风压力系数采用缩尺模型的风洞试验结果。非线性分析结果表明，该网壳结构具有较高的稳定性。
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| 关 键 词： | 网壳结构 稳定性评估 屈曲分析 柱面弧长法 |
| 文章编号： | 1672-3090（2007）04-0416-04 |
| 修稿时间： | 2006-12-22 |
Stability of a large roof reticulated shell structure: analysis and real-time assessment |
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| Li Gongbiao,Qu Weilian. Stability of a large roof reticulated shell structure: analysis and real-time assessment[J]. Journal of Wuhan University of Science and Technology(Natural Science Edition), 2007, 30(4): 416-419 |
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| Authors: | Li Gongbiao Qu Weilian |
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| Affiliation: | Hubei Roadway Bridge and Structural of Technology, Engineering Key Laboratory, Wuhan University Wuhan 430070, China |
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| Abstract: | The nonlinear buckling analysis of a large complex roof reticulated shell is made and a realtime assessment of structural stability is presented. A rigid-pin-joint model is used in which beam elements are used in the girder ribs and spatial bar elements are used in others. And a cylindrical arclength method is employed to trace the equilibrium path. For the roof structure, only wind loads and self-weight are considered. Wind pressure coefficients are obtained from a wind tunnel experiment of a reduced scale model. The results show that the shell is of excellent stability and the assessment strategy presented can be used in structural health monitoring. |
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| Keywords: | reticulated shell structure stability assessment buckling analysis cylindrical arc-length method |
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