Browse > Article
http://dx.doi.org/10.12652/Ksce.2022.42.3.0311

Monitoring the Structural Behavior of Reinforced RC Slabs Using Optical Fiber-embedded CFRP Sheets  

Kim, Jaehwan (Korea Institute of Civil Engineering and Building Technology)
Jung, Kyu-San (Korea Institute of Civil Engineering and Building Technology)
Kim, Byeong-Cheol (Korea Institute of Civil Engineering and Building Technology)
Kim, Kun-Soo (Korea Institute of Civil Engineering and Building Technology)
Park, Ki-Tae (Korea Institute of Civil Engineering and Building Technology)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.42, no.3, 2022 , pp. 311-322 More about this Journal
Abstract
This study performed 4-point flexural tests of reinforced concrete to which was attached a distributed optical fiber sheet and carbon fiber reinforced polymer (CFRP) sheets in order to assess the effect of the CFRP sheets and the applicability of a BOTDR sensor simultaneously. To evaluate the reinforcing effect, various degrees of CFRP sheet attachment were manufactured, and to evaluate the sensing ability, strains obtained from a BOTDR sensor were compared with strains measured from electric resistance strain gauges that were attached to the concrete surface. From the results, the reinforcing effects were evidently different according to the attachment type of the CFRP sheets, and it was confirmed that the main influencing factor on the reinforcing effect was the type of attachment rather than the attachment area. The reinforced concrete structural behavior was visualized with strains measured from the BOTDR sensor as load increased, and it was identified that load was concentrated in the CFRP reinforced area. Strains from the BOTDR sensor were similar to those from the electric resistance strain gauge; thereby a BOTDR sensor can be effective in the analysis of structural behaviorsof massive infrastructure. Finally, the strain from a BOTDR sensor was high where CFRP sheet fall-off occurs, and it would therefore be efficient to track local damage locations of CFRP sheets by utilizing a BOTDR sensor.
Keywords
Reinforced concrete; BOTDR sensor; CFRP sheet; Strain; Optical fiber;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 KS M 3734 (2015) Testing methods for shear strength of adhesives bonds by tensile loading, Korean standards Association
2 Sun, L., Shang, Z., Xia, Y., Bhowmick, S. and Nagarajaiah, S. (2020). "Review of bridge structural health monitoring aided by big data and artificial intelligence: From condition assessment to damage detection." Journal of Structural Engineering, Vol. 146, No. 5, pp. 04020073, DOI: 10.1061/(asce)st.1943-541x.0002535.   DOI
3 Wenwei, W. and Guo, L. (2006). "Experimental study and analysis of RC beams strengthened with CFRP laminates under sustaining load." International Journal of Solids and Structures, Vol. 43, No. 6, pp. 1372-1387, DOI: 10.1016/j.ijsolstr.2005.03.076.   DOI
4 ASTM C39/C39M (2018). Standard test method for compressive strength of cylinderical concrete specimens, American Society for Testing and Materials, USA.
5 ASTM D3039/D3039M (2017). Standard test method for tensile properties of polymer matrix composite materials, American Society for Testing and Materials, USA.
6 Broth, Z. and Hoult, N. A. (2020). "Dynamic distributed strain sensing to assess reinforced concrete behaviour." Engineering Structures, Vol. 204, pp. 110036, DOI: 10.1016/j.engstruct.2019.110036.   DOI
7 Alagusundaramoorthy, P., Harik, I. E. and Choo, C. C. (2003). "Flexural behavior of R/C beams strengthened with carbon fiber reinforced polymer sheets or fabric." Journal of Composites for Construction, Vol. 7, No. 4, pp. 292-301, DOI: 10.1061/(asce)1090-0268(2003)7:4(292).   DOI
8 ASTM A370 (2013). Standard test methods and definitions for mechanical testing of steel products, American Society for Testing and Materials, USA.
9 Park, J. S., Kim, B. C., Park, K. T. and Jung, K. S. (2018). "Analytical study on the bond performance of fiber optic sensor embedded carbon fiber sheets for strengthening concrete structures." Journal of the Korean Society for Advanced Composite Structures, Vol. 9, No. 2, pp. 31-36. DOI: 10.11004/kosacs.2018.9.2.031.   DOI
10 Shim, W. B., Hong, K. N., Yeon, Y. M. and Jung, K. S. (2020). "Strain response analysis of RC beams strengthened with optical fiber-embedded CFRP sheet." Journal of the Korean Society of Civil Engineers, KSCE, Vol. 40, No. 4, pp. 363-370.   DOI
11 Frhaan, W. K. M., Abu Bakar, B. H., Hilal, N. and Al-Hadithi, A. I. (2021). "CFRP for strengthening and repairing reinforced concrete: a review." Innovative Infrastructure Solutions, Vol. 6, No. 2, pp. 1-13, DOI: 10.1007/s41062-020-00417-5.   DOI
12 KS M 3015 (2018) Testing methods for thermosetting plastics, Korean standards Association
13 Lim, D. H. (2013). "An experimental study of flexural strengthening method of reinforced concrete beams with near surface mounted CFRP strips." Journal of the Korean Society of Civil Engineers, KSCE, Vol. 33, No. 1, pp. 131-136. DOI: 10.12652/ksce.2013.33.1.131.   DOI
14 Kim, K. S., Park, K. T., Kim, B. C., Kim, J. H. and Jung, K. S. (2020). "FEA for RC beams partially flexural reinforced with CFRP sheets." Journal of the Korea Institute for Structural Maintenance and Inspection, Vol. 24, No. 5, pp. 9-16.   DOI
15 Kim, Y. H. and Kim, H. S. (2012). "Experimental study for evaluating structural behavior of RC beams strengthened by tapered ended CFRP Sheets." Journal of the Korean Society for Advanced Composite Structures, Vol. 3, No. 4, pp. 38-44, DOI: 10.11004/kosacs.2012.3.4.038.   DOI