Commenced in January 2007
Paper Count: 31113
Structural Damage Detection via Incomplete Modal Data Using Output Data Only
Abstract:Structural failure is caused mainly by damage that often occurs on structures. Many researchers focus on to obtain very efficient tools to detect the damage in structures in the early state. In the past decades, a subject that has received considerable attention in literature is the damage detection as determined by variations in the dynamic characteristics or response of structures. The study presents a new damage identification technique. The technique detects the damage location for the incomplete structure system using output data only. The method indicates the damage based on the free vibration test data by using ‘Two Points Condensation (TPC) technique’. This method creates a set of matrices by reducing the structural system to two degrees of freedom systems. The current stiffness matrices obtain from optimization the equation of motion using the measured test data. The current stiffness matrices compare with original (undamaged) stiffness matrices. The large percentage changes in matrices’ coefficients lead to the location of the damage. TPC technique is applied to the experimental data of a simply supported steel beam model structure after inducing thickness change in one element, where two cases consider. The method detects the damage and determines its location accurately in both cases. In addition, the results illustrate these changes in stiffness matrix can be a useful tool for continuous monitoring of structural safety using ambient vibration data. Furthermore, its efficiency proves that this technique can be used also for big structures.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1109201Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1710
 Zu-Qing Qu. Model Order Reduction Techniques with Applications in Finite Element Analysis. 1st edition. Springer-Verlag London; 2004.
 Prashant V. Pokharkar, Manish Shrikhande. Structural Health Monitoring via Stiffness update. ISET journal of earthquake technology March 2010; 47(1) pp 47-60.
 Anil K. Chopra. Dynamics of Structures Theory and Applications to Earthquake engineering. 4th edition, Pearson Education, Inc.; 2012.
 De Silva CW. Vibration fundamentals and practice. Boca Raton: CRC Press; 2000.
 Mario P. and William L. Structural Dynamics: Theory and Computation. 5th edition, Springer Science Business Media; 2004.
 J. N. Reddy. An Introduction to the Finite Element Method. 3rd edition McGraw. HILL; 2006.
 John W. Leis. Digital Signal Processing Using MATLAB for Student and Researchers. 1st edition. John Wiley & Sons, Inc.; 2011.
 Monson H. Hayis, Statistical Digital Signal Processing and Modeling. 1st edition. John Wiley & Sons, Inc.; 1996.