Real-time analysis and interpretation of continuous data from structural health monitoring (SHM) systems

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• 作者：Yavuz Kaya (1)
  Erdal Safak (2)
  
  1. Department of Civil Engineering ; The University of British Columbia ; 6250 Applied Science Lane ; Vancouver聽 ; V6T 1Z4 ; Canada
  2. Department of Earthquake Engineering ; Bogazici University ; 34684聽 ; Cengelkoy ; Istanbul ; Turkey
  
• 关键词：Real ; time data processing ; Modal identification ; Damage detection ; Inter ; story drift
• 刊名：Bulletin of Earthquake Engineering
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：13
• 期：3
• 页码：917-934
• 全文大小：1,810 KB
• 参考文献：1. Apaydin NM, Kaya Y, Safak E, Alcik H (2011) Vibration characteristics of a suspension bridge under traffic and no traffic conditions. Earthq Eng Struct Dyn 41(12):1717鈥?723 CrossRef
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  9. Keypour H (2001) Nonlinear dynamic analysis of historical structures and application to Ayasofya Mosque, Ph.D. Dissertation, Bogazici University, Istanbul
  10. Kaya Y (2009) Tools and techniques for real-time modal identification, Ph.D. Dissertation, Bogazici University, Istanbul
  11. Kaya Y, Kocakaptan S, Safak E (2014) Estimation of vibration time histories at the non-instrumented floors of multi-story buildings using the recorded vibrations at the instrumented floors and calibration of analytical models (under review in Earthquake Engineering & Structural Dynamics)
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  19. Safak E (2004) Analysis of real-time data from instrumented structures. In: Proceedings (CD ROM). The 13th World Conference on Earthquake Engineering, Vancouver, B.C., Canada, August 1鈥?, 2004, Paper No. 2193
  20. Safak E (2005) Detection of seismic damage in structures from continuous vibration records (invited paper). In: Proceedings of 9th international conference on structural safety and reliability (ICOSSAR), Rome, pp 19鈥?3
  21. Safak E (2006) Real-time structural monitoring and damage detection by acceleration and GPS sensors. In: 8th US national conference on earthquake engineering, San Francisco, California 18鈥?2 April
  22. Safak E (2007) New techniques to analyze ambient vibration data. In: Proceedings, COMPDYN 2007鈥攃omputational methods in structural dynamics and earthquake engineering, Rethymno 13鈥?6 June
  23. Safak E, Cakti E, Kaya Y (2010) Recent developments in structural health monitoring and data analysis. In: Garevski M, Ansal A (eds) Earthquake engineering in Europe, Springer, London, pp 331鈥?55
  24. Skolnik D, Ciudad RM, Franke M, Milutinovic DZ, Ahmed A, Ali M, Kaya Y, Safak E (2013) Operation of the structural health monitoring network of unique structures in Abu Dhabi Emirate, 8th Gulf Seismic Forum, 3鈥? March. Oman, Muscat
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• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geotechnical Engineering
  Civil Engineering
  Geophysics and Geodesy
  Hydrogeology
  Structural Geology
  
• 出版者：Springer Netherlands
• ISSN：1573-1456

文摘

The dynamic characteristics of a structure are commonly defined by its modal properties: modal frequencies, damping ratios, and mode shapes. Significant changes in modal properties of a structure after an extreme event, such as an earthquake, or during its service life can be strongly related to damage in the structures. This makes it crucial that the modal properties are accurately estimated and continuously tracked to detect any changes by the structural health monitoring (SHM) system. This paper introduces an algorithm and a MATLAB-based software that includes modules for real-time data processing, modal identification, damage detection, and stakeholder warnings for vibration-based SHM systems. The data processing and modal identification techniques used are based on the classical and stochastic techniques, and utilize running time windows to keep track of time variations in real-time data. The damage detection algorithm makes use of inter-story drifts to detect and locate damage. Since the calculation of inter-story drifts involves double integration and subtraction of acceleration signals, it is extremely hard to get accurate values of inter-story drifts in real-time monitoring. To improve the accuracy, inter-story drifts are calculated for each mode of the structure separately, and then combined synchronously. The displacements at non-instrumented floors are estimated by assuming that the mode shapes can be approximated as a linear combination of those of a shear beam and a bending beam. A software package, REC_MIDS, is developed for this purpose, and it has been operating in a large number of different structures with SHM systems in Turkey (tall buildings, suspension bridges, mosques, museums), and in seven high-rise buildings in UAE.