Identification of damages of truss structures using elemental modal strain method - 文章详情页

作者：

Li, Yong-Mei (Li, Yong-Mei.) | Guo, Lei (Guo, Lei.) | Sun, Guo-Fu (Sun, Guo-Fu.) | Zhou, Xi-Yuan (Zhou, Xi-Yuan.) | Yang, Bo-Yan (Yang, Bo-Yan.)

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EI Scopus PKU CSCD

摘要：

On　the　basis　of　the　stressed　characteristics　of　space　truss　structures,　the　element　modal　strain　can　be　deduced　from　the　nodal　modal　displacement　by　the　finite　element　method　of　space　truss　elements　connected　by　pin　between　two　nodes.　Therefore　the　changes　of　the　elemental　modal　strain　in　the　low　order　are　presented　as　the　new　dynamic　fingerprints　for　damage　locations　of　truss　structures.　A　numerical　example　of　the　planar　truss　structure　is　provided　to　verify　the　practicability　of　the　proposed　method　only　by　one　lower　mode.　The　results　show　that　the　proposed　method　is　effective　to　locate　the　single　damage,　and　multiple,　light　and　severe　damages.　Damage　degrees　can　be　determined　by　the　magnitudes　of　the　damaged-element　modal　strain　changes.　Furthermore,　the　results　indicate　that　the　proposed　method　based　on　the　modal　strains　of　truss　elements　can　accurately　identify　the　damage　location　of　truss　structures　with　the　noisy　modal　data.

关键词：

Damage detection Modal analysis Numerical methods Strain Trusses

作者机构：

[ 1 ] [Li, Yong-Mei]Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Li, Yong-Mei]The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Guo, Lei]Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Sun, Guo-Fu]Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Zhou, Xi-Yuan]Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Zhou, Xi-Yuan]The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China
[ 7 ] [Yang, Bo-Yan]Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China

通讯作者信息：

电子邮件地址：

liym@bjut.edu.cn

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