Journal
SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES
Volume 52, Issue 10, Pages 2859-2868Publisher
SCIENCE PRESS
DOI: 10.1007/s11431-009-0267-1
Keywords
PPP-BOTDA; distributed strain; reinforced concrete structures; bond stress; crack monitoring; deformation
Funding
- National Natural Science Foundation of China [50608017, 50725828]
Ask authors/readers for more resources
Pulse-prepump Brillouin optical time domain analysis (PPP-BOTDA) is a novel technique for distributed strain measurements, in which a pre-pump pulse is inputted in front of the measuring pump pulse to stimulate the phonon, so that higher spatial resolution and measurement precision can be obtained. Principle, methodologies and technical parameters of the PPP-BOTDA are presented and the influence of temperature on measurements is discussed. Applications are made in the bond test of steel rebars and the bending test of concrete girders. Test results show that the PPP-BOTDA can provide a precise description on the strain distribution of steel rebar and concrete, exhibiting the ability for crack detection. Moreover, structural deformation can be obtained indirectly by accumulating the distributed strains along the optical fiber, thus the deflection curves of the concrete girder during the loading process are obtained. Suggestions with regards to the application of the PPP-BOTDA in strain measurements and crack monitoring for civil infrastructures are given.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available