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SLSE Damage Detection Technique for Foundation Strengthening Using Plates

Research paper by S. E. Chen, D. M. Boyajian, H. I. Inyang

Indexed on: 12 Dec '10Published on: 12 Dec '10Published in: Geotechnical and Geological Engineering



Abstract

This paper discusses the use of a vibration-based technique for damage detection in metal and composite plate wrappings for pier foundation repairs. The SLSE (Scanning Laser-Strain Energy) method relies on full-field laser modal scanning and strain energy computation to establish damage locations within composite wrappings. Strain energy distribution relies on segmental derivation of detected deflection shapes; hence, large numbers of spatial data points are required. By providing high spatial data density, laser scanner complement nicely with the damage detection technique. Using an aluminum plate and a composite plate, results from a baseline scan test is presented in this paper to demonstrate the show the high potential of this technique for detecting damage in plates commonly used for structural repairs.