| 桥梁抖振反应谱研究 |
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| 引用本文： | 刘志刚,陈艾荣,项海帆. 桥梁抖振反应谱研究[J]. 土木工程学报, 2002, 35(1): 28-34 |
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| 作者姓名： | 刘志刚 陈艾荣 项海帆 |
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| 作者单位： | 同济大学(刘志刚，陈艾荣)，同济大学(项海帆) |
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| 基金项目： | 国家自然科学基金重大项目资助，编号 :5989541 0 |
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| 摘 要： | 传统的抖振分析方法或者过于复杂而不便于工程应用 ,或者忽略了过多的因素而精度不高。根据R .H .Scanlan的桥梁颤抖振分析方法并引入气动导纳的影响 ,采用数值积分的结果 ,得到了大跨度桥梁抖振反应谱的实用公式 ,并提出了一种计入背景响应的实用方法。还研究了背景响应的变化规律 ,并进行了工程实例分析。分析结果表明 :背景响应在很多情况下不可忽略 ,现给出的实用公式具有较高的精度 ,可用于大跨度桥的梁抖振响应估算
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| 关 键 词： | 大跨桥梁 抖振反应谱 背景响应 实用公式 |
| 文章编号： | 1000-131X(2002)01-0028-07 |
| 修稿时间： | 1999-12-12 |
ON BUFFETING RESPONSES SPECTRUM OF BRIDGES |
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| Liu Zhigang Chen Airong Xiang Haifan. ON BUFFETING RESPONSES SPECTRUM OF BRIDGES[J]. China Civil Engineering Journal, 2002, 35(1): 28-34 |
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| Authors: | Liu Zhigang Chen Airong Xiang Haifan |
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| Abstract: | A practical formula of the buffeting response spectrum for a long span bridge is proposed in the paper.It is based on the Scanlan's buffeting theory with a modification of the aerodynamic admittance function.At the same time,the background response is considered.We found that the background response must be considered for some more flexible bridge with a mid span.The Yangtze river bridge at Yichang and the Minjiang river bridge at Fuzhou are taken as examples to be analyzed.The numerical results are compared with that of other methods.The comparison shows that the proposed formula is easy to use with enough accuracy. |
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| Keywords: | long?span bridges buffeting responses spectrum background responses practical formulae |
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