Sensitivity Based Analyses by Artificial Earthquake by Measuring Structural Accelerations for Damage Assessment

Document Type : Original Article

Author

Assistant Professor, Department of Civil Engineering , Amirkabir University of Technology

Abstract

In the recent years, damage detection of structures has been one of the active research areas in sensitivity analyses. There are various responses to determine the location and extent of damages in structures which one of them is deformations caused by dynamic stimulation of time history. In this research, artificial acceleration mapping, which is used in time history analyses, produced in agreement with earthquake properties by using wavelet functions. The approach which was used for damage detection was sensitivity based damage detection. Joint deformations caused by artificial acceleration mapping in structures were inputs of damage detection problem. In this research to show the capabilities of artificial acceleration mapping, two numerical cases were studied. Results indicated that artificial acceleration mapping not only was efficient in damage detection, it was more accurate than natural acceleration mapping.

Keywords


[1] Doebling, S.W. and Farrar, C.R. and Prime, M.B. and Shevitz, S.W.; “Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics”; Los Alamos National Laboratory Report LA 5, 13070, 1996.
[2] Weber, B. and Paultre, P. and Proulx, J.; “Consistent regularization of nonlinear model updating for damage identification”; Mechanical Systems and Signal Processing 23, 1965– 1985, 2009.
[3] Naseralavi, S.S. and Salajegheh, J. and Salajegheh, E. and Fadaee, M.J.; “An improved genetic algorithm using sensitivity analysis and micro  search for damage detection”; Asian journal of civil engineering (building and housing) 6, 717-240, 2010.
[4] Wang, X. and Hu, N.; “Structural damage identification using static test data and changes in frequencies”; Journal of Structural Engineering, 199, 23-718, 2007.
[5] Yam, L.H. and Li, Y.Y. and Li, X.Y. and Law, S.S.; “Adaptive Tikhonov regularization for damage detectionbased on nonlinear model updating”; Mechanical Systems and Signal Processing24, 1646–1664, 2010.
[6] آیین‌نامه طرح ساختمان­ها در برابر زلزله (1384-2800)، مرکز تحقیقات ساختمان و مسکن، ویرایش سوم
[7] Naeim, F. and Lew, M.; “On the use of design spectrum compatible time histories”; Earthquake Spectra 11, 111–127, 1995.
[8] Suàrez, L.E. and  Montejo, L.A.; “Generation of artificial earthquakes via the wavelet transform”; International Journal of Solids and Structures 42, 5905-5919, 2005.
[9] حیدری، ع.؛ «بهینه‌سازی سازه­ها با استفاده از روش­های پیشرفته»؛ رساله­ی دکتری تخصصی مهندسی عمران سازه، دانشکده مهندسی، دانشگاه شهیدباهنر کرمان، 1385.
[10] PEER strong motion database, http://peer.berkeley.edu/smcat.
[11] Wittrick, W.H.; “Rates of change of eigenvalues, with reference to buckling and vibration problems”; Journal of the Royal Aeronautical Society 66, 590-1, 1962.