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V.K. Dertimanis¹, E.N. Chatzi¹, S. Eftekhar Azam² and C. Papadimitriou²

¹Chair of Structural Mechanics, Institute of Structural Engineering, ETH Zurich, Switzerland
²Department of Mechanical Engineering, University of Thessaly, Volos, Greece

doi:10.4203/ccp.110.139

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V.K. Dertimanis, E.N. Chatzi, S. Eftekhar Azam, C. Papadimitriou, "Fatigue Assessment in Steel Railway Bridges using Output Only Vibration Measurements and Partial Structural Information", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 139, 2016. doi:10.4203/ccp.110.139

Keywords: fatigue life estimation, steel bridge, vibration response, unscented Kalman filter.

Summary

A novel methodological framework for the online fatigue lifetime assessment of steel railway bridges is presented in this paper. By adopting a simply supported beam model amenable to a moving force at a constant velocity, the framework presumes the availability of noise-corrupted structural vibration acceleration response measurements and formulates an online estimator that identifies the unknown (i) excitation force, (ii) structural information, which herein pertains to the modal damping ratio, and (iii) modal displacements and velocities. The estimated information is subsequently applied to the calculation of stresses in both measured and unmeasured locations and, thus, to the residual fatigue life estimation of the structure. The numerical results provide a significant indication of effectiveness and suggest further investigation.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 110 PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 139 Fatigue Assessment in Steel Railway Bridges using Output Only Vibration Measurements and Partial Structural Information V.K. Dertimanis¹, E.N. Chatzi¹, S. Eftekhar Azam² and C. Papadimitriou² ¹Chair of Structural Mechanics, Institute of Structural Engineering, ETH Zurich, Switzerland ²Department of Mechanical Engineering, University of Thessaly, Volos, Greece doi:10.4203/ccp.110.139 purchase the full-text of this paper Full Bibliographic Reference for this paper V.K. Dertimanis, E.N. Chatzi, S. Eftekhar Azam, C. Papadimitriou, "Fatigue Assessment in Steel Railway Bridges using Output Only Vibration Measurements and Partial Structural Information", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 139, 2016. doi:10.4203/ccp.110.139 Keywords: fatigue life estimation, steel bridge, vibration response, unscented Kalman filter. Summary A novel methodological framework for the online fatigue lifetime assessment of steel railway bridges is presented in this paper. By adopting a simply supported beam model amenable to a moving force at a constant velocity, the framework presumes the availability of noise-corrupted structural vibration acceleration response measurements and formulates an online estimator that identifies the unknown (i) excitation force, (ii) structural information, which herein pertains to the modal damping ratio, and (iii) modal displacements and velocities. The estimated information is subsequently applied to the calculation of stresses in both measured and unmeasured locations and, thus, to the residual fatigue life estimation of the structure. The numerical results provide a significant indication of effectiveness and suggest further investigation. purchase the full-text of this paper (price £22) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £85 +P&P)
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