| 大跨径连续梁实桥构件刚度模态识别方法 |
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| 引用本文： | 袁红茵,戴永相. 大跨径连续梁实桥构件刚度模态识别方法[J]. 上海公路, 2007, 0(1): 51-54 |
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| 作者姓名： | 袁红茵 戴永相 |
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| 作者单位： | 广州市市政园林局;广州市市政园林局 |
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| 摘 要： | 提出一种利用低阶测试模态对桥梁构件抗弯刚度进行有限权量平差的最小二乘解识别方法。通过对主跨110m的广州大桥主桥3跨变截面连续箱梁实桥梁体抗弯刚度进行数值模拟识别及结合桥梁现场动静载试验进行识别结果,表明此方法利用现有的测试技术对大跨径连续梁桥进行抗弯刚度识别误差是常规最小二乘解识别误差的1/8～1/10,识别精度得到了极大的改善。
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| 关 键 词： | 大跨径连续梁 构件刚度 有限权量平差 识别方法 |
| 收稿时间： | 2007-01-16 |
| 修稿时间： | 2007-01-16 |
A flexural rigidity modal identification method for long-span continuous girder bridge |
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| YUAN Hong-yin,DAI Yong-xiang. A flexural rigidity modal identification method for long-span continuous girder bridge[J]. Shanghai Highways, 2007, 0(1): 51-54 |
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| Authors: | YUAN Hong-yin DAI Yong-xiang |
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| Affiliation: | YUAN Hong-yin DAI Yong-xiang |
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| Abstract: | A least-square solution with finite power indirect adjustment method of flexural rigidity identification method for long-span continuous girder bridge is developed by using lower measured accurate modes.The numerical analysis and dynamic-static test verification with a full-scale three-span continuous beam of Guangzhou-Bridge habe been done in order to identify the flexural rigidity of structures and to verify the sensitivity of measured errors.The analyzed result shows that the method could be quite satisfied with engineering requirements. |
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| Keywords: | long-span continuous girder member rigidity finite power indirect with least square identification method |
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