Damage Identification of Fatigue Crack in Steel Truss Structure
Abstract eng: 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.
Contributors:
Conference Title:
Conference Title:
14th World Conference on Earthquake Engineering
Conference Venue:
Bejing (CN)
Conference Dates:
2008-10-12 / 2008-10-17
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
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Record created 2014-12-05, last modified 2014-12-05
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