Abstract
Existing techniques for instrumentation of civil structure foundations have limitations, including low accuracy, poor reliability and difficulty in installation. The feasibility of incorporating fiber Bragg grating (FBG) sensing technology into health monitoring of foundation structures is discussed. Innovative FBG strain sensors, temperature sensors, settlement sensors and horizontal inclinometers have been developed to monitor strains, temperatures and displacements in foundations. Results from laboratory calibration tests have shown that these sensors have high resolution and repeatability. These sensors have been successfully installed in the ground and the raft foundation of a building in Hong Kong, with the quasi-distributed foundation monitoring system formed with an automatic and remote configuration. The early-stage monitoring results are obtained and analyzed. Recommendations are proposed to handle the problems that may occur during the instrumentation.
| Original language | Chinese (Simplified) |
|---|---|
| Pages (from-to) | 109-115 |
| Number of pages | 7 |
| Journal | Tumu Gongcheng Xuebao/China Civil Engineering Journal |
| Volume | 43 |
| Issue number | 6 |
| Publication status | Published - 1 Jun 2010 |
Keywords
- Fiber Bragg grating (FBG)
- Fiber optic sensing technology
- Foundation
- Health monitoring
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Architecture