Crack monitoring on concrete structures: Comparison of various distributed fiber optic sensors with digital image correlation method

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung


The quality of strain measurements using distributed fiber optic sensors (DFOS) depends largely on the bond between the host material and the optical fiber. Experimental investigations were carried out to test the suitability of five different DFOS types for crack monitoring. The DFOS were subsequently bonded to two 4 m long reinforced concrete (RC) beams, so that the influence of the application technique could be evaluated. DFOS measurements were verified by digital image correlation (DIC) and electrical strain gauges (SGs). For the different DFOS types, clear differences in the measured strain curves and determined crack widths were observed. The focus was on two robust DFOS, which can be deployed on construction sites. Compared to the layered sensing cable, a monolithic DFOS showed a clear strain distribution with pronounced strain peaks even for closely spaced cracks. The crack widths obtained by integrating the strain curves showed high agreement with DIC measurements.


Seiten (von - bis)6123-6140
FachzeitschriftStructural Concrete
PublikationsstatusVeröffentlicht - 14 Juni 2023

Externe IDs

Scopus 85161893629
WOS 001010419500001
ORCID /0000-0002-2187-1652/work/142241781
ORCID /0000-0001-8735-1345/work/142244648
ORCID /0000-0002-7298-2395/work/142251897


Forschungsprofillinien der TU Dresden

Fächergruppen, Lehr- und Forschungsbereiche, Fachgebiete nach Destatis


  • crack monitoring, crack width calculation, DFOS, DFOS type, distributed fiber optic sensing, existing concrete bridges, installation technique, Existing concrete bridges, Dfos, Distributed fiber optic sensing, Crack width calculation, Installation technique, Crack monitoring