论文信息 - A Study on the WPT-based Structural Damage Alarming of the ASCE Benchmark Experiments

A Study on the WPT-based Structural Damage Alarming of the ASCE Benchmark Experiments

A workable realization procedure for damage alarming of frame structures is put forward based on energy variations of structural dynamic responses decomposed using wavelet packet transform in the paper. The WPT-based method consists of two steps: 1) calculation of the wavelet packet energy spectrum from the measured structural dynamic responses; 2) extraction of the damage alarming index ERVD from the wavelet packet energy spectrum, which is sensitive to structural local damage and insensitive to measurement noise. The ASCE benchmark experiments demonstrate the practicability of the damage alarming method for fame structures, which reveal that the WPT-based damage alarming index ERVD is a good candidate index that is sensitive to structural local damage affected by the actual measurement noise. Also, the experimental results reveal that the lower decomposition level and dominant frequency bands are sufficient for the detection of the damage occurrence using the index ERVD, which makes the proposed damage alarming procedure practical.

Tao Liu | Aiqun Li | Youliang Ding

[1] Youliang Ding,et al. Theoretical Research on Structural Damage Alarming of long-span Bridges Using Wavelet Packet Analysis , 2005 .

[2] Chih-Chen Chang,et al. Statistical Wavelet-Based Method for Structural Health Monitoring , 2004 .

[3] Chih-Chen Chang,et al. Structural Damage Assessment Based on Wavelet Packet Transform , 2002 .

[4] Charles R. Farrar,et al. A summary review of vibration-based damage identification methods , 1998 .

[5] Shirley J. Dyke,et al. Phase II of the ASCE Benchmark Study on SHM , 2002 .

[6] Wei-Xin Ren,et al. Wavelet packet based damage identification of beam structures , 2005 .

[7] Shirley J. Dyke,et al. Experimental Phase II of the Structural Health Monitoring Benchmark Problem , 2003 .

[8] Miao Chang-qing,et al. INVESTIGATION ON THE STRUCTURAL DAMAGE ALARMING METHOD BASED ON WAVELET PACKET ENERGY SPECTRUM , 2006 .

[9] Paul J. Barr,et al. Overview of Vibrational Structural Health Monitoring with Representative Case Studies , 2006 .

[10] Hani G. Melhem,et al. Damage detection of structures by wavelet analysis , 2004 .

[11] David A. Nix,et al. Vibration–based structural damage identification , 2001, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.