| 钢框架模型结构的损伤诊断 |
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| 引用本文： | 徐龙河,刘向真.钢框架模型结构的损伤诊断[J].天津大学学报(自然科学与工程技术版),2008,41(2):221-225. |
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| 作者姓名： | 徐龙河 刘向真 |
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| 作者单位： | [1]北京交通大学土木建筑工程学院,北京100044 [2]潍坊市鲁成招标有限公司,潍坊261061 |
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| 基金项目： | 北京交通大学人才基金资助项目 |
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| 摘 要： | 提出了一种基于结构振动特性的两阶段损伤诊断方法，先由基于柔度矩阵的损伤定位技术确定可能损伤的单元位置，然后采用二阶特征灵敏度分析法对其损伤程度进行估计,对一两层空间钢框架模型结构进行了模拟损伤试验研究，采用环境与力锤脉冲两种激励方式，考虑了4种损伤模式、损伤诊断的结果表明，该方法能够有效地识别出结构损伤单元的位置与严重程度．
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| 关 键 词： | 结构试验 损伤诊断 特征灵敏度分析 柔度矩阵 |
| 文章编号： | 0493-2137（2008）02-0221-05 |
| 收稿时间： | 2007-09-03 |
| 修稿时间： | 2007-11-12 |
Damage Diagnosis on a Steel Frame Model Structure |
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| XU Long-he , LIU Xiang-zhen.Damage Diagnosis on a Steel Frame Model Structure[J].Journal of Tianjin University(Science and Technology),2008,41(2):221-225. |
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| Authors: | XU Long-he LIU Xiang-zhen |
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| Institution: | XU Long-he , LIU Xiang-zhen(1. School of Civil Engineering and Architecture, Beijing Jiaotong Universigy, Beijing 100044, China; 2. Weifang Lucheng Tendering Corporation Limited, Weifang 261061, China) |
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| Abstract: | A vibration-based two-stage damage diagnosis method was proposed. A flexibility matrix-based damage locating technique was used to find the most possible damaged elements of the structure, and then the damage severity was estimated using the second order eigen-sensitivity analysis method. Damage identification tests on a two-story spatial steel frame model structure were carried out, and two excitation patterns, ambient excitation and the hammer impacts excitation, were adopted. The 4 known damaged cases were considered. The results indicate that the proposed method can effectively detect the damage locations and assess the severity. |
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| Keywords: | structural test damage diagnosis eigen-sensitivity analysis flexibility matrix |
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