標題: | Wave Number-Based Technique for Detecting Slope Discontinuity in Simple Beams Using Moving Test Vehicle |
作者: | Yau, J. D. Yang, Judy P. Yang, Y. B. 土木工程學系 Department of Civil Engineering |
關鍵字: | Bridge;slope discontinuity;test vehicle;wavelength;wave number |
公開日期: | 1-八月-2017 |
摘要: | The wavelength characteristic is a useful clue for locating and assessing the severity of slope discontinuity in beams. In this study, the slope discontinuity of a beam is represented by an internal hinge restrained by elastic springs, and the wavelength of the beam is calculated indirectly from the vertical response of a test vehicle during its travel over the beam. The key parameters of the problem at hand are first unveiled using an approximate, closed-form solution for the response of the vehicle moving at low speeds over the bridge. Then a two-beam element model with slope discontinuity is formulated for the vehicle-bridge interaction (VBI) system for use in numerical simulation. In the examples, the wavenumber-based response of the test vehicle is used to identify the location and severity of the discontinuity in the beam. It is demonstrated that the wavelength-based technique presented herein by using the moving test vehicle as a moving sensor system offers a promising, alternative approach for damage detection in girder type bridges. |
URI: | http://dx.doi.org/10.1142/S0219455417500602 http://hdl.handle.net/11536/145984 |
ISSN: | 0219-4554 |
DOI: | 10.1142/S0219455417500602 |
期刊: | INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS |
Volume: | 17 |
顯示於類別: | 期刊論文 |