Experimental investigation on CFRC for strain measurement and damage detection
Journal
International Conference on Advances in Experimental Structural Engineering
Journal Volume
2013-November
ISBN
9780000000002
Date Issued
2013-01-01
Author(s)
Abstract
Structural monitoring systems are important in civil engineering. Traditional structural monitoring systems have some disadvantages such as a shorter sensor life span than the structures. This research uses CFRC as a structural monitoring sensor to extend the life of the sensor. There are some known advantages of carbon fiber reinforced concrete, such as high tensile strength and high ductility which increases the seismic capacity and security of structures. However, CFRC has functionality similar to piezoresistive materials which can be used as a self-sensing material for strain measurement and damage detection. The strain sensing behavior is such that the resistivity decreases reversibly upon compression due to the slight inward push of crack-bridging fibers and the consequent decrease in the contact electrical resistivity of the fiber-cement interface. To consider the economic benefits, the fiber content is only 0.2 vol. % which is less than half of the amount used in other references (0.48 vol. %). The experimental results show that the conductivity of current materials is significantly improved by CFRC and that it can be used for strain measurement and damage detection. Moreover, the experimental results of CFRC coated beams can be kept in a database for applications in the future.
Subjects
CFRC | Damage detection | Self-sensing | Strain measurement
Type
conference paper