Analytical Bond-Slip Model for Fiber-Reinforced Cementitious Matrix-Concrete Joints Based on Strain Measurements
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 11
Abstract
An accurate bond-slip model is of fundamental importance to analyze the response of fiber-reinforced cementitious matrix (FRCM) composite-strengthened structures. This study proposes a method to determine the bond-slip model of FRCM-concrete joints based on longitudinal fiber strains. First, discrete strain profiles measured with strain gauges were fitted by a continuous function , where is the coordinate along the bonded length. Then the slip and shear stress () along the composite bonded length were obtained by integration and derivation of , respectively. The debonding load and peak load from single-lap direct shear specimens were predicted by the fitted function and showed good agreement with test results. From the plot of the relationship obtained from , an alternative, closed-form, continuous bond-slip relationship was obtained based on the maximum shear stress and the corresponding slip . The fracture energy was compared for both relationships and was in reasonable agreement with values reported in previous studies.
Get full access to this article
View all available purchase options and get full access to this article.
References
ACI (American Concrete Institute). 2013. Guide to design and construction of externally bonded fabric-reinforced cementitious matrix (FRCM) systems for repair and strengthening concrete and masonry structures. ACI 549.4R. Farmington Hills, MI: ACI.
Alabdulhady, M. Y., L. H. Sneed, and C. Carloni. 2017. “Torsional behavior of RC beams strengthened with PBO-FRCM composite—An experimental study.” Eng. Struct. 136: 393–405. https://doi.org/10.1016/j.engstruct.2017.01.044.
Alecci, V., F. Focacci, L. Rovero, G. Stipo, and M. De Stefano. 2016. “Extrados strengthening of brick masonry arches with PBO-FRCM composites: Experimental and analytical investigations.” Compos. Struct. 149: 184–196. https://doi.org/10.1016/j.compstruct.2016.04.030.
Awani, O., A. El Refai, and T. El-Maaddawy. 2015. “Bond characteristics of carbon fabric-reinforced cementitious matrix in double shear tests.” Constr. Build. Mater. 101: 39–49. https://doi.org/10.1016/j.conbuildmat.2015.10.017.
Azam, R., and K. Soudki. 2014. “FRCM strengthening of shear-critical RC beams.” J. Compos. Constr. 18 (5): 04014012. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000464.
Babaeidarabad, S., G. Loreto, and A. Nanni. 2014. “Flexural strengthening of RC beams with an externally bonded fabric-reinforced cementitious matrix.” J. Compos. Constr. 18 (5): 04014009. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000473.
Bilotta, A., F. Ceroni, G. P. Lignola, and A. Prota. 2017. “Use of DIC technique for investigating the behaviour of FRCM materials for strengthening masonry elements.” Composites Part B: Eng. 129: 251–270. https://doi.org/10.1016/j.compositesb.2017.05.075.
Blanksvärd, T., B. Täljsten, and A. Carolin. 2009. “Shear strengthening of concrete structures with the use of mineral-based composites.” J. Compos. Constr. 13 (1): 25–34. https://doi.org/10.1061/(ASCE)1090-0268(2009)13:1(25).
Bournas, D. A., P. V. Lontou, C. G. Papanicolaou, and T. C. Triantafillou. 2007. “Textile-reinforced mortar versus fiber-reinforced polymer confinement in reinforced concrete columns.” ACI Struct. J. 104 (6): 740–748.
Brückner, A., R. Ortlepp, and M. Curbach. 2008. “Anchoring of shear strengthening for T-beams made of textile reinforced concrete (TRC).” Mater. Struct. 41 (2): 407–418. https://doi.org/10.1617/s11527-007-9254-9.
Caggegi, C., D. Sciuto, and M. Cuomo. 2018. “Experimental study on effective bond length of basalt textile reinforced mortar strengthening system: Contributions of digital image correlation.” Measurement 129: 119–127. https://doi.org/10.1016/j.measurement.2018.07.003.
Carloni, C., T. D’Antino, L. H. Sneed, and C. Pellegrino. 2015. “Role of the matrix layers in the stress-transfer mechanism of FRCM composites bonded to a concrete substrate.” J. Eng. Mech. 141 (6): 04014165. https://doi.org/10.1061/(ASCE)EM.1943-7889.0000883.
Carloni, C., L. H. Sneed, and T. D’Antino. 2013. “Interfacial bond characteristics of fiber reinforced concrete mortar for external strengthening of reinforced concrete members.” In Proc., 8th Int. Conf. on Fracture Mechanics of Concrete and Concrete Structures, 1–9. Chicago: IA-FraMCoS.
Carloni, C., and K. V. Subramaniam. 2012. “Application of fracture mechanics to debonding of FRP from RC members.” ACI Spec. Publ. 286: 1–16.
Dai, J., T. Ueda, and Y. Sato. 2006. “Unified analytical approaches for determining shear bond characteristics of FRP-concrete interfaces through pullout tests.” J. Adv. Concr. Technol. 4 (1): 133–145. https://doi.org/10.3151/jact.4.133.
D’Ambrisi, A., L. Feo, and F. Focacci. 2012. “Bond-slip relations for PBO-FRCM materials externally bonded to concrete.” Compos. Part B Eng. 48 (8): 2938–2949. https://doi.org/10.1016/j.compositesb.2012.06.002.
D’Ambrisi, A., L. Feo, and F. Focacci. 2013. “Experimental analysis on bond between PBO-FRCM strengthening materials and concrete.” Composites Part B: Eng. 44 (1): 524–532. https://doi.org/10.1016/j.compositesb.2012.03.011.
D’Antino, T., C. Carloni, L. H. Sneed, and C. Pellegrino. 2014. “Matrix-fiber bond behavior in PBO FRCM composites: A fracture mechanics approach.” Eng. Fract. Mech. 117: 94–111. https://doi.org/10.1016/j.engfracmech.2014.01.011.
D’Antino, T., P. Colombi, C. Carloni, and L. H. Sneed. 2018. “Estimation of a matrix-fiber interface cohesive material law in FRCM-concrete joints.” Compos. Struct. 193: 103–112. https://doi.org/10.1016/j.compstruct.2018.03.005.
D’Antino, T., L. H. Sneed, C. Carloni, and C. Pellegrino. 2015. “Influence of the substrate characteristics on the bond behavior of FRCM-concrete joints.” Constr. Build. Mater. 101 (1): 838–850. https://doi.org/10.1016/j.conbuildmat.2015.10.045.
D’Antino, T., L. H. Sneed, C. Carloni, and C. Pellegrino. 2016. “Effect of the inherent eccentricity in single-lap direct-shear tests of PBO FRCM-concrete joints.” Compos. Struct. 142: 117–129. https://doi.org/10.1016/j.compstruct.2016.01.076.
De Felice, G., S. De Santis, L. Garmendia, B. Ghiassi, P. Larrinaga, P. B. Lourenco, D. V. Oliveira, F. Paolacci, and C. G. Papanicolaou. 2014. “Mortar-based systems for externally bonded strengthening of masonry.” Mater. Struct. 47 (12): 2021–2037. https://doi.org/10.1617/s11527-014-0360-1.
Donnini, J., G. Lancioni, T. Bellezze, and V. Corinaldesi. 2017. “Bond behavior of FRCM carbon yarns embedded in a cementitious matrix: Experimental and numerical results.” Key Eng. Mater. 747: 305–312. https://doi.org/10.4028/www.scientific.net/KEM.747.305.
Focacci, F., T. D’Antino, C. Carloni, L. H. Sneed, and C. Pellegrino. 2017. “An indirect method to calibrate the interfacial cohesive material law for FRCM-concrete joints.” Mater. Des. 128: 206–217. https://doi.org/10.1016/j.matdes.2017.04.038.
Gonzalez-Libreros, J., T. D’Antino, and C. Pellegrino. 2017a. “Experimental behavior of glass-FRCM composites applied onto masonry and concrete substrates.” Key Eng. Mater. 747: 390–397. https://doi.org/10.4028/www.scientific.net/KEM.747.390.
Gonzalez-Libreros, J. H., C. Sabau, L. H. Sneed, C. Pellegrino, and G. Sas. 2017b. “State of research on shear strengthening of RC beams with FRCM composites.” Constr. Build. Mater. 149: 444–458. https://doi.org/10.1016/j.conbuildmat.2017.05.128.
Hollaway, L. C. 2010. “A review of the present and future utilisation of FRP composites in the civil infrastructure with reference to their important in-service properties: Review article.” Constr. Build. Mater. 24 (12): 2419–2445. https://doi.org/10.1016/j.conbuildmat.2010.04.062.
Ombres, L., N. Mancuso, S. Mazzucca, and S. Verre. 2017. “Bond between carbon fabric-reinforced cementitious matrix and masonry substrate.” J. Mater. Civ. Eng. 31 (1): 1–11. https://doi.org/10.1061/(ASCE)MT.1943-5533.0002561.
Sabau, C., J. H. Gonzalez-Libreros, L. H. Sneed, G. Sas, C. Pellegrino, and B. Täljsten. 2017. “Use of image correlation system to study the bond behavior of FRCM-concrete joints.” Mater. Struct. 50 (3): 172. https://doi.org/10.1617/s11527-017-1036-4.
Sneed, L. H., T. D’Antino, and C. Carloni. 2014. “Investigation of bond behavior of PBO fiber-reinforced cementitious matrix-composite concrete interface.” ACI Mater. J. 111 (5): 569–580.
Sneed, L. H., T. D’Antino, C. Carloni, and C. Pellegrino. 2015. “A comparison of the bond behavior of PBO-FRCM composites determined by double-lap and single-lap shear tests.” Cem. Concr. Compos. 64: 37–48. https://doi.org/10.1016/j.cemconcomp.2015.07.007.
Teng, J. G., J. F. Chen, S. T. Smith, and L. Lam. 2002. FRP-strengthened RC structures. Chichester, UK: Wiley.
Trapko, T. 2013. “The effect of high temperature on the performance of CFRP and FRCM confined concrete elements.” Compos. Part B: Eng. 54: 138–145. https://doi.org/10.1016/j.compositesb.2013.05.016.
Wakjira, T. G., and U. Ebead. 2018. “Hybrid NSE/EB technique for shear strengthening of reinforced concrete beams using FRCM: Experimental study.” Constr. Build. Mater. 164: 164–177. https://doi.org/10.1016/j.conbuildmat.2017.12.224.
Younis, A., and U. Ebead. 2018. “Bond characteristics of different FRCM systems.” Constr. Build. Mater. 175: 610–620. https://doi.org/10.1016/j.conbuildmat.2018.04.216.
Information & Authors
Information
Published In
Copyright
©2019 American Society of Civil Engineers.
History
Received: Oct 23, 2018
Accepted: Apr 8, 2019
Published online: Aug 16, 2019
Published in print: Nov 1, 2019
Discussion open until: Jan 16, 2020
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.