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Structural health diagnosis method based on a system identification technique of self-learning type for bi-axial nonlinear vibration system

基于自学习型系统辨识技术的双轴非线性振动系统结构健康诊断方法

基本信息

批准号：
18560542
负责人：
KURITA Satoshi
金额：
$ 2.43万
依托单位：
Tokyo University of Science (2007)Tohoku University (2006)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560542/
关键词：
Structural health diagnosis Damage System identification Nonlinear vibration system 非線形復元力

项目摘要

This project proposed a structural health diagnosis method using a system identification technique. The structural health diagnosis method evaluates the damage level of a building from the earthquake responses of a building estimated using the identified structural model. The earthquake damages of some buildings were estimated by the structural health diagnosis method. The buildings are installed the observation system of earthquake response and monitored the response of vibration. The feasibility study of the structural health monitoring using the structural response to weak wind was performed.The proposed identification technique estimates the parameters of nonlinear story shear-deformation models for a building from earthquake response records and updates automatically the parameters after earthquakes. The nonlinear story-deformation relationship takes bi-axial deformation into account. The structural health diagnosis method evaluates the reliability of the estimated damage level from the estimate error of the model parameters based on stochastic theory.The results of the structural health diagnosis using the proposed method illustrate the affectivity in damage detection. The data of the response to weak wind is useful in the structural health diagnosis.

本计画提出一种利用系统辨识技术之结构健康诊断方法。结构健康诊断方法根据使用识别的结构模型估计的建筑物的地震响应来评估建筑物的损坏水平。采用结构健康诊断方法对某建筑物进行了震害评估。建筑物安装了地震反应观测系统，对建筑物的振动反应进行了监测.研究了利用结构弱风响应进行结构健康监测的可行性，提出了一种基于结构弱风响应的结构非线性层间剪切变形模型参数识别方法，该方法利用结构的地震响应记录来估计结构的层间剪切变形模型参数，并在地震发生后自动更新模型参数。非线性层间变形关系考虑了双向变形。基于随机理论的结构健康诊断方法从模型参数估计误差的角度来评估损伤程度估计值的可靠性，结构健康诊断结果表明了该方法在损伤诊断中的有效性。弱风响应的数据是有用的结构健康诊断。