DAMAGE IDENTIFICATION OF FATIGUE CRACK IN STEEL TRUSS STRUCTURE
Structural Health Monitoring (SHM) has emerged as a new research area in the field of civil engineering. Localized characteristics of damage in steel truss require local measurements. The main difficulties of obtaining the local parameters include: (1) exciting higher modes in an element of the truss; (2) predominance of the lower frequency global modes for the truss vibrations; (3) choice of health baseline for the truss. In this project, using theoretical and experimental methods, free vibration characteristics of an elastic simple beam with a fatigue notch crack damage located any where of the beam is investigated. And then, new health baseline based on symmetry for steel truss structure is defined. Based on this baseline, experimental data are obtained to show that the local and relative small damage can be detected even when the global dynamic characteristics of the steel truss do not change significantly.
Structural Health Monitoring (SHM) health baseline crack damage modal frequency
PEI Qiang GUO Xun
The R&D Center of the Civil Engineering Technology, DaLian University, Dalian, China;School of Civil Institute of Engineering Mechanics, China Earthquake Administration, Harbin,China
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）