DAMAGE DIAGNOSIS FOR FRAME STRUCTURES BASED ON CHANGE RATE OF ELEMENTAL MODAL STRAIN ENERGY

Li Yongmei; Hu Kun; Yao Xuanyi; Zhao Jinxin

doi:10.13204/j.gyjz201301028

Volume 43 Issue 1

Dec. 2014

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Hu Xiaopeng, Niu Ditao, Zhang Yongli. STUDY ON BEARING CAPACITY OF REINFORCED CONCRETE FLEXURAL MEMBER DURING CONSTRUCTION[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(1): 44-48. doi: 10.13204/j.gyjz201301011

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Li Yongmei, Hu Kun, Yao Xuanyi, Zhao Jinxin. DAMAGE DIAGNOSIS FOR FRAME STRUCTURES BASED ON CHANGE RATE OF ELEMENTAL MODAL STRAIN ENERGY[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(1): 125-130. doi: 10.13204/j.gyjz201301028

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DAMAGE DIAGNOSIS FOR FRAME STRUCTURES BASED ON CHANGE RATE OF ELEMENTAL MODAL STRAIN ENERGY

doi: 10.13204/j.gyjz201301028

1.
1. Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China;
2.
2. The Key Laboratory of Urban Security and Disaster Engineering,Ministry of Education,Beijing University of Technology,Beijing 100124,China

Received Date: 2012-01-31
Publish Date: 2013-01-20

Abstract

Abstract

Generally modal displacement indices are not very efficient to identify structural damage or diagnosis for frame structures.In order to improve efficiency and reliability for damage diagnosis,change rate of elemental modal strain energy was presented as dynamic indicator for damage locations of frame structures.The numerical simulation example of a frame structure indicated that the damage location and severity in structures,with single damage,lighter ones and multiple ones,could be detected efficiently by change rate of elemental modal strain energy with only the first order mode.The results indicated that the proposed method based on modal strain energy could accurately identify the damage location of truss structures with the noisy modal data.Furthermore,damage degree could be derived from the amplitude value of change rate of modal strain energy for the detected damage element.
- frame structure,
- damage diagnosis,
- change rate of elemental modal strain energy,
- mode

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References(8)

References

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