TY - GEN
T1 - Reliable damage detection and localization using direct strain sensing
AU - Yao, Y.
AU - Glisic, B.
PY - 2012
Y1 - 2012
N2 - Civil infrastructure in the U.S. is aging and has been identified as an area in critical need. Many bridges of great importance are approaching the end of their lifespan. It is necessary to determine and monitor their structural health in order to mitigate risks, prevent disasters, and plan maintenance activities in an optimized manner. The need for reliable, robust, and low-cost Structural Health Monitoring (SHM) is thus rapidly increasing. In spite of its importance, however, SHM is rarely utilized on real structures. The main reason for this is the cost and limited reliability achievable by current monitoring technologies. The sensors currently available must be sparsely spaced and either provide severely insufficient spatial-resolution for early damage detection or rely on complex algorithms that degrade specificity against environmental and variable-load conditions. The objectives of this research are two-fold: to investigate sensing-system principles that provide affordable monitoring through a dense and expansive array of sensors enabled by distributed fiber optic technology and technology called large-area electronics; and to experimentally study how the high-resolution sensing offered by such systems can overcome the robustness and reliability limitations affecting current SHM technologies. The main concepts are presented in this paper along with both reduced- and large-scale test results, which demonstrate that the proposed technologies and direct sensing approach are beneficial for reliable damage detection and localization of damage over large areas of a structure.
AB - Civil infrastructure in the U.S. is aging and has been identified as an area in critical need. Many bridges of great importance are approaching the end of their lifespan. It is necessary to determine and monitor their structural health in order to mitigate risks, prevent disasters, and plan maintenance activities in an optimized manner. The need for reliable, robust, and low-cost Structural Health Monitoring (SHM) is thus rapidly increasing. In spite of its importance, however, SHM is rarely utilized on real structures. The main reason for this is the cost and limited reliability achievable by current monitoring technologies. The sensors currently available must be sparsely spaced and either provide severely insufficient spatial-resolution for early damage detection or rely on complex algorithms that degrade specificity against environmental and variable-load conditions. The objectives of this research are two-fold: to investigate sensing-system principles that provide affordable monitoring through a dense and expansive array of sensors enabled by distributed fiber optic technology and technology called large-area electronics; and to experimentally study how the high-resolution sensing offered by such systems can overcome the robustness and reliability limitations affecting current SHM technologies. The main concepts are presented in this paper along with both reduced- and large-scale test results, which demonstrate that the proposed technologies and direct sensing approach are beneficial for reliable damage detection and localization of damage over large areas of a structure.
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U2 - 10.1201/b12352-96
DO - 10.1201/b12352-96
M3 - Conference contribution
AN - SCOPUS:84863930665
SN - 9780415621243
T3 - Bridge Maintenance, Safety, Management, Resilience and Sustainability - Proceedings of the Sixth International Conference on Bridge Maintenance, Safety and Management
SP - 714
EP - 721
BT - Bridge Maintenance, Safety, Management, Resilience and Sustainability - Proceedings of the Sixth International Conference on Bridge Maintenance, Safety and Management
PB - Taylor and Francis - Balkema
T2 - 6th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2012
Y2 - 8 July 2012 through 12 July 2012
ER -