24 August 2000 Determination of load-strain characteristics of concrete slabs by using embedded fiber Bragg grating sensors
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Abstract
In this paper, we present our work on the fiber Bragg grating (FBG) sensors for structural health monitoring in 5m long concrete structures. Two sets of sensors were securely fastened onto the surfaces of the top and bottom reinforced bars respectively before concrete was poured in. Another set of the sensors was mounted onto the slab surface. These sensors were then monitored to observe the strain experienced at different locations within concrete slab. Loading and unloading cycle tests and failure test were performed on the completed structure. From the results obtained using the FBG sensors, we were able to correlate t he load-strain behavior of the slabs to the failure state as observed on the slab surface. These data are useful in determining the maximum allowable load before failure sets in. At the same time, we made comparisons of the data obtained using our FBG sensors with those obtained with electrical strain gauges. The two sets of data show a similar trend during the loading and unloading tests as well as during the failure tests.
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Yong Wang, Chuan Swee Tjin, Jianzhong Hao, Tuan-Kay Lim, Kian-Beng Tan, K. M. Chan, Pilate Moyo, James M. W. Brownjohn, "Determination of load-strain characteristics of concrete slabs by using embedded fiber Bragg grating sensors", Proc. SPIE 4073, Fifth European Conference on Smart Structures and Materials, (24 August 2000); doi: 10.1117/12.396410; https://doi.org/10.1117/12.396410
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