An important objective of structural health monitoring (SHM) for civil infrastructure is to identify the state of the structure and to detect these changes when it occurred. The changes of features in a structural system may due to the nonlinear inelastic response of structure or due to the structural damage subjected to severe external loading. Therefore, damage detection in large structural system, such as buildings and bridges, can improve safety and reduce maintenance costs and the design of damage detection system is one of the goals of SHM. The objective of this paper is to develop an on-line and almost real-time system parameter estimation and damage detection technique from the response measurements through using the Recursive Subspace identification (RSI) or Recursive Stochastic Subspace Identification (RSSI) approaches. Verification of the proposed method by using data from both numerical simulation and the shaking table test of a steel structure with abrupt change of inter-story stiffness are discussed. With the implementation of forgetting factor in RSSI/RSI methods the ability of on-line damage detection of structural system can be enhanced.
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ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 28–October 1, 2010
Philadelphia, Pennsylvania, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-4416-8
PROCEEDINGS PAPER
Online Tracking of Structural Parameters Based on Recursive Subspace Identification
Jian-Huang Weng,
Jian-Huang Weng
National Taiwan University, Taipei, Taiwan
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Chin-Hsiung Loh
Chin-Hsiung Loh
National Taiwan University, Taipei, Taiwan
Search for other works by this author on:
Jian-Huang Weng
National Taiwan University, Taipei, Taiwan
Chin-Hsiung Loh
National Taiwan University, Taipei, Taiwan
Paper No:
SMASIS2010-3610, pp. 551-558; 8 pages
Published Online:
April 4, 2011
Citation
Weng, J, & Loh, C. "Online Tracking of Structural Parameters Based on Recursive Subspace Identification." Proceedings of the ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2. Philadelphia, Pennsylvania, USA. September 28–October 1, 2010. pp. 551-558. ASME. https://doi.org/10.1115/SMASIS2010-3610
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