Data analysis and detection methods for on-line health monitoring of bridge structures

Details

• Creators:
  Hu, S. L. J. ; Hillier, T. S. ; Stepanishen, P.
• Corporate Creators:
  University of Rhode Island. Transportation Center ; United States. Department of Transportation. University Transportation Centers (UTC) Program
• Subject/TRT Terms:
  • Structural health monitoring
  • Bridge substructures
  • Bridge superstructures
  • Statistical analysis
  • Detection and identification
  • Loss and damage
  • Structural deterioration and defects
  • Bridges(Structures)
  • Damage assessment
  • Detection
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• Publication/ Report Number:
  URITC-536112 ; URITC FY99-12
• Resource Type:
  Research Paper
• Geographical Coverage:
  United States
• Edition:
  Final
• Corporate Publisher:
  University of Rhode Island. Transportation Center
• Abstract:
  Developing an efficient structural health monitoring (SHM) technique is important for reducing potential hazards posed ; to the public by damaged civil structures. The ultimate goal of applying SHM is to real-time detect, localize, and quantify ; the accumulated structural damage. Traditionally, damage assessment techniques are primarily based on the observation ; of the changes of model parameters, such as modal frequencies and vibration shapes. However, several investigations ; have pointed out that this technique could be efficient only if very precise measurements are available or large level of ; damage exists. It is obvious that a more robust damage assessment algorithm must be developed. The objective of this ; research is to develop a new technique, named matched damage processing (MDP) technique, to perform damage ; detection, localization, and severity estimation for bridge structures subjected to traffic loading. The MDP technique ; builds upon the concept of matched field processing already developed in the underwater acoustics community. In short, ; the MDP technique compares measured responses collected from the physical structure with multiple modeled results ; calculated based on various damage locations and severity. The comparison is displayed in a contour or image plot with ; damage location and severity as the independent coordinates. The concept, effectiveness and robustness of the MDP ; technique are numerically demonstrated via a simple example where a simply supported beam is used to model a bridge ; and the traffic loading is modeled as a constant weight moving with constant speed across the bridge. A localized ; reduction of structural stiffness is applied to represent the occurrence of damage to the bridge. The mode superposition ; technique in conjunction with the finite element method is employed to solve the numerical problem. According to the ; numerical results, it is found that the MDP technique is effective and robust to estimate location and severity of structural ; deterioration.
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• Format:
  PDF
• Funding:
  536112
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/5230/dot_5230_DS1.pdf
• File Type:
  [PDF - 1.14 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:ddb108941c833017728637b53493c83edff35fcb735d0c091ec9f50e1741b05cb7568cfd876826c4c13952e24cadf3bbdc0ad88874ff6153076a18934e4b28e7