| 基于一阶振型斜率改变损伤检测的试验研究 |
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| 引用本文： | 李林,朱宏平,夏勇,滕灯光. 基于一阶振型斜率改变损伤检测的试验研究[J]. 华中科技大学学报(城市科学版), 2007, 24(2): 36-40 |
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| 作者姓名： | 李林 朱宏平 夏勇 滕灯光 |
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| 作者单位： | 华中科技大学,土木工程与力学学院,湖北,武汉,430074;华中科技大学,控制结构湖北省重点实验室,湖北,武汉,430074 |
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| 摘 要： | 提出了基于一阶振型斜率改变的剪切型建筑损伤检测方法,并进行了试验验证。首先,对损伤造成的结构各层一阶振型斜率改变进行修正,修正一阶振型斜率改变大于0的层为损伤层。然后,对结构不同损伤程度的单损伤工况进行数值模拟,得到单损伤工况下损伤层在不同损伤程度下的一阶振型斜率改变量。最后,将损伤层的修正一阶振型斜率改变与该层单损伤工况下的一阶振型斜率改变进行比较,得到结构的损伤程度。方法的有效性通过一个三层的剪切型框架模型试验得到了验证。
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| 关 键 词： | 剪切型建筑 损伤检测 一阶振型斜率 试验研究 |
| 文章编号： | 1672-7037（2007）02-0036-05 |
| 修稿时间： | 2006-12-20 |
Experimental Study on Damage Detection Based on the Changes in the First Order Mode Shape Slopes |
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| LI Lin,ZHU Hong-ping,XIA Yong,TENG Deng-guang. Experimental Study on Damage Detection Based on the Changes in the First Order Mode Shape Slopes[J]. Journal of Huazhong University of Science and Technology, 2007, 24(2): 36-40 |
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| Authors: | LI Lin ZHU Hong-ping XIA Yong TENG Deng-guang |
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| Abstract: | An approach based on the changes in the first order mode shape slopes to detect shear-type frame structures was presented.Firstly,the changes in the first order mode shape slopes caused by damage were modified.When the modified changes in the first order mode shape slopes are larger than zero,the corresponding stories are damaged.Secondly,structural singular damage scenarios with different damage extent were numerically simulated,and the changes in the first mode shape slopes were calculated.Finally,the damage extent of damaged story was identified by comparing the modified changes in the first mode shape slopes with those obtained by numerical simulation.The proposed approach was verified by the experimental test of a three-story shear-type frame structure. |
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| Keywords: | shear-type frame structure damage detection first mode shape slope experimental study |
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