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| 基于应变模态的结构损伤定位方法 | |
| 引用本文： | 李军,于德栋,白会人.基于应变模态的结构损伤定位方法[J].世界地震工程,2007,23(1):104-109. |
| 作者姓名： | 李军 于德栋 白会人 |
| 作者单位： | 1. 大连理工大学,工业装备结构分析国家重点实验室,辽宁,大连,116024 2. 大连经济技术开发区金源房地产开发有限公司,辽宁,大连,116600 3. 大连大学,建筑工程学院,辽宁,大连,116622 |
| 摘 要： | 针对简支梁的单一位置及其多位置损伤，利用结构有限元分析软件计算得到简支梁的位移模态，再通过应变和位移之间具有一阶导数的关系，对简支梁进行了应变模态分析。结果表明，应变模态对损伤比较敏感而位移模态对损伤不够敏感；当损伤发生在应变模态的节点处时，损伤不易被识别，但是可以结合多阶应变模态进行损伤识别。最后对应变模态法的工程实用性进行了评价。 |
| 关 键 词： | 简支梁 位移模态 应变模态 损伤识别 |
| 文章编号： | 1007-6069(2007)01-0104-06 |
| 修稿时间： | 2006-07-13 |
Damage localization of changes based on the strain modes for simply supported beam |
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| LI Jun,YU De-dong,BAI Hui-ren.Damage localization of changes based on the strain modes for simply supported beam[J].World Information On Earthquake Engineering,2007,23(1):104-109. | |
| Authors: | LI Jun YU De-dong BAI Hui-ren |
| Institution: | 1.State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024 ,China; 2. Dalian Development Area Kingswealth Group Construction Real Estate Co. Ltd,China; 3. College of Civil and Architectural Engineering, Dalian University, Dalian 115622, China |
| Abstract: | Strain mode analysis is a damage identification method which is sensitive to damage location and damage degree. It is meaningful for damage detection and health monitoring of the structures. In this paper, displacement mode of a simply for single-position supported beam is calculated by using finite element software, and then strain modes of the beam damage and multi-position damage are carried through strain and displacement respectively. The results ment mode. From the results of the multi-position one-order differential relationship between show that strain mode is more sensitive to damage than displacedamage, damage location would be difficult to i situated in the nodes of the strain mode, but it can be overcomed damage location because the damage is impossibly located on the by combining multi-order strain node of every-order strain mode practicability of the strain modal analysis is evaluated in the end. |
| Keywords: | simply supported beam displacement mode strain mode damage detection |
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