| 高墩大跨刚构桥施工阶段的抗风分析 |
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| 引用本文： | 韩万水,陈艾荣,马如进,周志勇.高墩大跨刚构桥施工阶段的抗风分析[J].同济大学学报(自然科学版),2007,35(2):166-170. |
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| 作者姓名： | 韩万水 陈艾荣 马如进 周志勇 |
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| 作者单位： | 1. 同济大学,土木工程防灾国家重点实验室,上海,200092;长安大学,桥梁与隧道陕西省重点实验室,陕西,西安,710064
2. 同济大学,土木工程防灾国家重点实验室,上海,200092 |
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| 摘 要： | 采用离散涡(DVM)及风洞测力方法,确定主梁静气动力系数.采用抖振时域方法,计算最大双悬臂状态时的抖振响应,与风洞试验结果进行对比分析,计算中阻尼系数由气弹模型实测阻尼比确定;由于气弹模型设计中阻尼比相似不能够实现,故修正计算结果,探讨阻尼比对抖振响应的影响;最后采用两种抗风分析方法——阵风系数法和抖振时域分析法,分别对结构进行分析计算.实例分析的计算结果表明,按阵风系数法得到的横桥向响应偏于保守.
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| 关 键 词： | 桥梁施工 抗风稳定性 抖振时域 最大双悬臂状态 阻尼比 阵风系数法 |
| 文章编号： | 0253-374X（2007）02-0166-05 |
| 修稿时间： | 2005-06-09 |
Wind-Resistant Analysis of Long-Span Rigid Frame Bridge with High Pier During Construction |
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| HAN Wanshui,CHEN Airong,MA Rujin,ZHOU Zhiyong.Wind-Resistant Analysis of Long-Span Rigid Frame Bridge with High Pier During Construction[J].Journal of Tongji University(Natural Science),2007,35(2):166-170. |
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| Authors: | HAN Wanshui CHEN Airong MA Rujin ZHOU Zhiyong |
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| Abstract: | Static aerodynamic coefficients of main girder were determined by the Discrete Vortex Method(DVM) and measurement of static forces in wind tunnel.Time-domain buffeting method was used to calculate buffeting-induced responses at the maximum double cantilever stage,which were compared with the wind tunnel test results,and damping coefficients were determined by measured damping ratio of aeroelastic model in the analysis.Because the required damping ratio can not be achieved in the design of an aeroelastic model,a proper modification for the dynamic response is carried out and the influence of damping ratio on buffeting-induced responses is discussed.At last,wind-resistant analysis is made by means of gust coefficient method and time-domain buffeting method,and the results show that the transverse response calculated with gust coefficient method is conservative. |
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| Keywords: | construction stage wind-resistant stability time-domain buffeting the maximum double cantilever stage damping ratio gust coefficient method |
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