| 某高墩大跨连续刚构桥抖振时域分析 |
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| 引用本文： | 李黎,胡亮,樊剑.某高墩大跨连续刚构桥抖振时域分析[J].华中科技大学学报(城市科学版),2006,23(1):1-4. |
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| 作者姓名： | 李黎 胡亮 樊剑 |
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| 作者单位： | 华中科技大学,土木工程与力学学院,湖北,武汉,430074 |
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| 基金项目： | 交通部西部交通建设科技项目(200431800024) |
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| 摘 要： | 使用大型通用有限元软件AN SY S建立了某桥的成桥阶段和施工最不利阶段的有限元模型,分析了模型的动力特性.根据POD型的谱表示法模拟了桥梁的脉动风速场并进行了相关性拟合检验,然后基于准定常理论计算了作用在模型上的抖振力时程.最后由HHT方法进行时程分析,分别求得了两种模型的抖振时域分析的结果,据此有效地评价了桥的抗风性能.
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| 关 键 词： | 大跨桥梁 风场模拟 POD型谱表示法 抖振时域分析 |
| 文章编号： | 1672-7037（2006）01-0001-04 |
| 收稿时间： | 2005-09-19 |
| 修稿时间： | 2005年9月19日 |
Time Domain Buffeting Analysis for a Long-span Rigid Frame Bridge |
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| LI Li,HU Liang,FAN Jian.Time Domain Buffeting Analysis for a Long-span Rigid Frame Bridge[J].Journal of Huazhong University of Science and Technology,2006,23(1):1-4. |
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| Authors: | LI Li HU Liang FAN Jian |
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| Abstract: | By using the general finite element analysis(FEA) software ANSYS the finite element model are established for a bridge including the post-construction stage and the longest twin-cantilever construction.Dynamic characteristics of the two models are surveyed.By employing the POD-based spectral representation method,the turbulent wind-velocity field around the bridge is simulated and verified.Then,the buffeting force sequences,which can be applied to the models,are computed on the basis of the quasi-steady aerodynamic theory.Finally,the results of the time-domain buffeting analysis for the two models are obtained by carrying out the time-history analysis.Thus,the wind-resistant design for the bridge can be conducted. |
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| Keywords: | long-span bridge wind field simulation POD-based spectral representation method time domain buffeting analysis |
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