| 大跨斜拉桥扁平钢箱梁损伤定位指标的噪声鲁棒性比较研究 |
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| 引用本文： | 丁幼亮,李爱群,缪长青.大跨斜拉桥扁平钢箱梁损伤定位指标的噪声鲁棒性比较研究[J].公路交通科技,2007,24(4):79-83. |
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| 作者姓名： | 丁幼亮 李爱群 缪长青 |
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| 作者单位： | 东南大学,土木工程学院,江苏,南京,210096 |
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| 基金项目： | 国家自然科学基金资助项目(50378017)，国家自然科学基金重大国际合作项目子项目(50420120133)，高等学校科技创新工程重大项目培育资金项目(704024) |
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| 摘 要： | 以润扬大桥斜拉桥的扁平钢箱梁结构为分析对象,采用子结构方法将扁平钢箱梁结构的整体尺度动力特性和细节尺度构件损伤相互衔接实现多尺度损伤分析。在此基础上对模态曲率、模态应变能、模态柔度和斜拉索索力等4类结构损伤定位指标的抗噪声干扰能力进行了对比分析。分析结果表明,模态应变能和模态柔度对于扁平钢箱梁结构损伤定位具有较好的互补性,将其相结合对扁平钢箱梁主跨和边跨的损伤识别具有较好的抗噪声干扰能力。
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| 关 键 词： | 桥梁工程 大跨斜拉桥 多尺度损伤分析 钢箱梁 模态参数 损伤定位 |
| 文章编号： | 1002-0268(2007)04-0079-05 |
| 修稿时间： | 2006-09-18 |
Comparative Study on Noise Robusticity of Damage Locating Indices for Steel Box Girder of Long-span Cable-stayed Bridges |
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| DING You-liang,LI Ai-qun,MIAO Chang-qing.Comparative Study on Noise Robusticity of Damage Locating Indices for Steel Box Girder of Long-span Cable-stayed Bridges[J].Journal of Highway and Transportation Research and Development,2007,24(4):79-83. |
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| Authors: | DING You-liang LI Ai-qun MIAO Chang-qing |
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| Institution: | School of Civil Engineering, Southeast University, Jiangsu Nanjing 210096, China |
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| Abstract: | The full-scale dynamic characteristics and fine-scale local damage of steel box girder are studied by the substructuring method to realize structural multi-scale damage analysis with respect to Runyang Cable-stayed Bridge.The modal curvature index,modal strain energy index,modal flexibility index and cable tension index for damage localization of steel box girder are further comparatively studied with regard to noise resistance ability.The analysis results show that modal strain energy index and modal flexibility index are complementary to each other in damage location identification for steel box girder. |
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| Keywords: | bridge engineering long-span cable-stayed bridge multi-scale damage analysis steel box girder modal parameter damage location identification |
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