| Title | Data analysis and detection methods for on-line health monitoring of bridge structures |
|---|---|
| Record ID | 19611 |
| Personal Name Creator |
Hu, S. L. J.; Hillier, T. S.; Stepanishen, P. |
| Source | 28p. in various pagings |
| Corporate Creator | University of Rhode Island. Transportation Center; United States. Department of Transportation. University Transportation Centers (UTC) Program |
| Publisher | University of Rhode Island. Transportation Center |
| Publication Date | 20020600 |
| Language | English |
| 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. |
| Rosap ID | dot:5230 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/5230 |
| TRT Terms | Structural health monitoring; Bridge substructures; Bridge superstructures; Statistical analysis; Detection and identification; Loss and damage; Structural deterioration and defects |
| General Subjects | Bridges(Structures); Damage assessment; Detection; Monitoring; Structural analysis |
| Classification | NTL - HIGHWAY/ROAD TRANSPORTATION - Bridges and Structures; NTL - HIGHWAY/ROAD TRANSPORTATION - HIGHWAY/ROAD TRANSPORTATION; NTL - HIGHWAY/ROAD TRANSPORTATION - Construction and Maintenance |
| Geographical Coverage |
United States |
| OCLC | 50420932 |
| Contract Number | 536112 |
| Report Number | URITC-536112; URITC FY99-12 |
| Resource type | Research Paper |
| URL | https://ntlrepository.blob.core.windows.net/lib/19000/19600/19611/PB2002108482.pdf |
| Format | |
| Database | NTL Digital Repository |