TY - JOUR
T1 - Measurement and visualization of strains and cracks in CFRP post-tensioned fiber reinforced concrete beams using distributed fiber optic sensors
AU - Tan, Xiao
AU - Abu-Obeidah, Adi
AU - Bao, Yi
AU - Nassif, Hani
AU - Nasreddine, Wassim
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/4
Y1 - 2021/4
N2 - This paper presents a method to measure and visualize strains and cracks in high-performance fiber-reinforced concrete using distributed fiber optic sensors based on optical frequency domain reflectometry. Two beams were prepared using high-performance concrete with two types of fibers and post-tensioned with carbon-fiber-reinforced polymer (CFRP) tendons. The beams were instrumented with distributed sensors which were installed using two methods compatible with realistic construction. The beams were tested under four-point bending until failure. The distributed sensors measured strain distributions over the length of the beams in real time. The strain distributions are analyzed to detect, locate, trace, quantify, and visualize cracks during the processes of their initiation and propagation. The crack widths measured from the distributed sensors as well as a crack microscope are in a good agreement. This study is expected to promote distributed sensing technology for monitoring and control of construction and operation automation in new and existing structures.
AB - This paper presents a method to measure and visualize strains and cracks in high-performance fiber-reinforced concrete using distributed fiber optic sensors based on optical frequency domain reflectometry. Two beams were prepared using high-performance concrete with two types of fibers and post-tensioned with carbon-fiber-reinforced polymer (CFRP) tendons. The beams were instrumented with distributed sensors which were installed using two methods compatible with realistic construction. The beams were tested under four-point bending until failure. The distributed sensors measured strain distributions over the length of the beams in real time. The strain distributions are analyzed to detect, locate, trace, quantify, and visualize cracks during the processes of their initiation and propagation. The crack widths measured from the distributed sensors as well as a crack microscope are in a good agreement. This study is expected to promote distributed sensing technology for monitoring and control of construction and operation automation in new and existing structures.
KW - Crack detection
KW - Crack width
KW - Distributed fiber optic sensors (DFOS)
KW - High-performance fiber-reinforced concrete (HPFRC)
KW - Optical frequency domain reflectometry (OFDR)
KW - Structural health monitoring (SHM)
UR - http://www.scopus.com/inward/record.url?scp=85100252627&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85100252627&partnerID=8YFLogxK
U2 - 10.1016/j.autcon.2021.103604
DO - 10.1016/j.autcon.2021.103604
M3 - Article
AN - SCOPUS:85100252627
SN - 0926-5805
VL - 124
JO - Automation in Construction
JF - Automation in Construction
M1 - 103604
ER -