In-Plane Cyclic Performance of Masonry Walls Retrofitted with Flax Textile–Reinforced Mortar Overlays
Publication: Journal of Composites for Construction
Volume 26, Issue 5
Abstract
This paper investigates the performance of flax textile–reinforced mortars (FTRM) as a retrofitting solution for unreinforced masonry. Six medium-scale walls were subjected to in-plane cyclic shear tests. Four of the specimens were retrofitted on both sides with one or two layers of flax textiles embedded in lime-based mortar. One bare wall and one wall strengthened only with lime-based mortar were examined as reference samples. FTRM provided up to 118% higher shear load and ultimate drift and promoted the development of energy dissipation mechanisms, while ensuring structural integrity. Based on the experimental evidence, the contribution of individual shear resisting mechanisms was assessed and existing design models were found to overestimate the stress that can be developed in the flax textile when two layers were applied. A new design model that adopts a more rational limiting strain value and accounts for the contribution of the mortar and the unique mechanical performance of FTRM systems was proposed and validated against an experimental database, including natural and advanced textile-reinforced mortar systems.
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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.
ACI (American Concrete Institute). 2020. Guide to design and construction of externally bonded fabric-reinforced cementitious matrix (FRCM) and steel-reinforced grout (SRG) systems for repair and strengthening masonry structures. ACI 549.6R. Farmington Hills, MI: ACI.
Almeida, J. A. P. P., E. B. Pereira, and J. A. O. Barros. 2015. “Assessment of overlay masonry strengthening system under in-plane monotonic and cyclic loading using the diagonal tensile test.” Constr. Build. Mater. 94: 851–865. https://doi.org/10.1016/j.conbuildmat.2015.07.040.
ASCE. 2013. Seismic evaluation and retrofit of existing buildings. ASCE41. Reston, VA: ASCE.
Askouni, P. D., and C. G. Papanicolaou. 2017. “Experimental investigation of bond between glass textile reinforced mortar overlays and masonry: The effect of bond length.” Mater. Struct. 50 (2): 164. https://doi.org/10.1617/s11527-017-1033-7.
ASTM. 2019. Standard test methods for cyclic (reversed) load test for shear resistance of vertical elements of the lateral force resisting systems for buildings. ASTM E2126. West Conshohocken, PA: ASTM.
Augenti, N., F. Parisi, A. Prota, and G. Manfredi. 2011. “In-plane lateral response of a full-scale masonry subassemblage with and without an inorganic matrix-grid strengthening system.” J. Compos. Constr. 15 (4): 578–590. https://doi.org/10.1061/(asce)cc.1943-5614.0000193.
Babaeidarabad, S. 2013. “Masonry walls strengthened with fabric-reinforced cementitious matrix composite subjected to in-plane and out-of-plane load.” Ph.D. thesis, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Miami.
Babaeidarabad, S., F. De Caso, and A. Nanni. 2014. “URM walls strengthened with fabric-reinforced cementitious matrix composite subjected to diagonal compression.” J. Compos. Constr. 18 (2): 04013045. https://doi.org/10.1061/(asce)cc.1943-5614.0000441.
Bournas, D. 2016. “Strengthening of existing structures: Selected case studies.” In Textile fiber composites in civil engineering, edited by T. C. Triantafillou. Cambridge, UK: Woodhead Publishing.
Carozzi, F. G. et al., 2017. “Experimental investigation of tensile and bond properties of carbon-FRCM composites for strengthening masonry elements.” Composites, Part B 128: 100–119. https://doi.org/10.1016/j.compositesb.2017.06.018.
CEN (European Committee for Standardization). 1999a. Methods of test for masonry, part 1. European Standard 1052. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 1999b. Methods of test for mortar for masonry, part 11. European Standard 1015. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2000. Methods of test for masonry units, part 1. European Standard 772. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2002. Methods of test for mortar for masonry, part 3. European Standard 1052. Brussels, Belgium: CEN.
CEN (European Committee of Standardization). 2004. Design of structures for earthquake resistance, part 1. Eurocode 8. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2005a. Design of masonry structures, part 1.1. Eurocode 6. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2005b. Design of structures for earthquake resistance, part 3. Eurocode 8. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2013. Textiles - tensile properties of fabrics, part 1. European Standard 13934. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2015. Building lime, part 1. European Standard 459. Brussels, Belgium: CEN.
Cevallos, O. A., and R. S. Olivito. 2015. “Effects of fabric parameters on the tensile behavior of sustainable cementitious composites.” Composites, Part B 69: 256–266. https://doi.org/10.1016/j.compositesb.2014.10.004.
Cevallos, O. A., R. S. Olivito, R. Codispoti, and L. Ombres. 2015. “Flax and polyparaphenylene benzobisoxazole cementitious composites for the strengthening of masonry elements subjected to eccentric loading.” Composites, Part B 71: 82–95. https://doi.org/10.1016/j.compositesb.2014.10.055.
CNR (Italian National Research Council). 2018. Guide for the design and construction of fiber reinforced inorganic matrix systems for strengthening existing structures. CNR DT 215. Rome: CNR.
Coburn, A. W., and R. J. S. Spence. 2002. Earthquake protection. Chichester, UK: Wiley.
Codispoti, R., D. V. Oliveira, R. S. Olivito, P. B. Lourenço, and R. Fangueiro. 2015. “Mechanical performance of natural fiber-reinforced composites for the strengthening of masonry.” Composites, Part B 77: 74–83. https://doi.org/10.1016/j.compositesb.2015.03.021.
Crawford, B., S. Pakpour, N. Kazemian, J. Klironomos, K. Stoeffler, D. Rho, J. Denault, and A. S. Milani. 2017. “Effect of fungal deterioration on physical and mechanical properties of hemp and flax natural fiber composites.” Materials 10 (11): 1252. https://doi.org/10.3390/ma10111252.
de Carvalho Bello, C. B., I. Boem, A. Cecchi, N. Gattesco, and D. V. Oliveira. 2019. “Experimental tests for the characterization of sisal fiber reinforced cementitious matrix for strengthening masonry structures.” Constr. Build. Mater. 219: 44–55. https://doi.org/10.1016/j.conbuildmat.2019.05.168.
de Felice, G. et al., 2018. “Recommendation of RILEM technical committee 250-CSM: Test method for textile reinforced mortar to substrate bond characterization.” Mater. Struct. 51 (4): 1–9. https://doi.org/10.1617/s11527-018-1216-x.
Del Zoppo, M., M. Di Ludovico, and A. Prota. 2019. “Analysis of FRCM and CRM parameters for the in-plane shear strengthening of different URM types.” Composites, Part B 171: 20–33. https://doi.org/10.1016/j.compositesb.2019.04.020.
Dizhur, D., and J. M. Ingham. 2013. “Diagonal tension strength of vintage unreinforced clay brick masonry wall panels.” Constr. Build. Mater. 43: 418–427. https://doi.org/10.1016/j.conbuildmat.2013.02.015.
Dizhur, D., J. Ingham, M. Griffith, D. Biggs, and A. Schultz. 2016. “Performance of unreinforced masonry and infilled RC buildings during the 2015 Gorkha, Nepal earthquake sequence.” In Brick and block masonry - Trends, innovations and challenges, edited by C. Modena, F. da Porto, and M. R. Valluzzi. London: Taylor and Francis.
Donnini, J., G. Maracchini, S. Lenci, V. Corinaldesi, and E. Quagliarini. 2021. “TRM reinforced tuff and fired clay brick masonry: Experimental and analytical investigation on their in-plane and out-of-plane behavior.” Constr. Build. Mater. 272: 121643. https://doi.org/10.1016/j.conbuildmat.2020.121643.
Dunne, R., D. Desai, R. Sadiku, and J. Jayaramudu. 2016. “A review of natural fibers, their sustainability and automotive applications.” J. Reinf. Plast. Compos. 35 (13): 1041–1050. https://doi.org/10.1177/0731684416633898.
EU (European Union). 2011. Laying down harmonised conditions for the marketing of construction products and repealing Council Directive 89/106/EEC. Regulation (EU) No 305/2011 of the European Parliament and of the and Council Official Journal of the European Union, L 88/5, 5-43. Brussels, Belgium: EU.
Faella, C., E. Martinelli, E. Nigro, and S. Paciello. 2010. “Shear capacity of masonry walls externally strengthened by a cement-based composite material: An experimental campaign.” Constr. Build. Mater. 24: 84–93. https://doi.org/10.1016/j.conbuildmat.2009.08.019.
Faruk, O., A. K. Bledzki, H.-P. Fink, and M. Sain. 2012. “Biocomposites reinforced with natural fibers: 2000–2010.” Prog. Polym. Sci. 37 (11): 1552–1596. https://doi.org/10.1016/j.progpolymsci.2012.04.003.
FEMA. 2000. Prestandard and commentary for the seismic rehabilitation of buildings. FEMA 356. Washington, DC: FEMA.
Ferrara, G., C. Caggegi, E. Martinelli, and A. Gabor. 2020. “Shear capacity of masonry walls externally strengthened using Flax–TRM composite systems: Experimental tests and comparative assessment.” Constr. Build. Mater. 261: 120490. https://doi.org/10.1016/j.conbuildmat.2020.120490.
Ferrara, G., and E. Martinelli. 2018. “Tensile behavior of textile reinforced mortar composite systems with flax fibers.” In Proc., 12th Int. PhD Symposium in Civil Engineering, 1–7. Prague, Czech Republic: fib.
Ferrara, G., M. Pepe, and E. Martinelli. 2021. “Influence of fibres impregnation on the tensile response of flax textile reinforced mortar composite systems.” In Fiber reinforced concrete: Improvements and innovations, RILEM-fib international symposium on FRC (BEFIB), edited by P. Serna, A. Llano-Torre, J. R. M. Vargas, and J. Navarro-Gregori. Valencia, Spain: Springer.
Ferrara, G., M. Pepe, E. Martinelli, and R. Dias Tolêdo Filho. 2019. “Influence of an impregnation treatment on the morphology and mechanical behaviour of flax yarns embedded in hydraulic lime mortar.” Fibers 7 (4): 30. https://doi.org/10.3390/fib7040030.
Goutianos, S., T. Peijs, B. Nystrom, and M. Skrifvars. 2006. “Development of flax fibre based textile reinforcements for composite applications.” Appl. Compos. Mater. 13 (4): 199–215. https://doi.org/10.1007/s10443-006-9010-2.
ICC (International Code Council). 2016. Acceptance criteria for masonry and concrete strengthening using fiber-reinforced cementitious matrix (FRCM) and steel reinforced grout (SRG) composite systems. ICC Evaluation Services. AC434. Los Angeles: ICC.
Ilki, A., and M. N. Fardis. 2014. Seismic evaluation and rehabilitation of structures. Berlin: Springer.
Ismail, N., T. El-Maaddawy, N. Khattak, and A. Najmal. 2018. “In-plane shear strength improvement of hollow concrete masonry panels using a fabric-reinforced cementitious matrix.” J. Compos. Constr. 22 (2): 04018004. https://doi.org/10.1061/(asce)cc.1943-5614.0000835.
Jacobsen, L. S. 1960. “Damping in composite structures.” In Proc., 2nd World Conf. on Earthquake Engineering, 1029–1044. Tokyo and Kyoto, Japan: Gakujutsu Bunken Fukyu-Kai (Association for Science Documents Information).
Kouris, L. A. S., and T. C. Triantafillou. 2018. “State-of-the-art on strengthening of masonry structures with textile reinforced mortar (TRM).” Constr. Build. Mater. 188: 1221–1233. https://doi.org/10.1016/j.conbuildmat.2018.08.039.
Leone, M. et al., 2017. “Glass fabric reinforced cementitious matrix: Tensile properties and bond performance on masonry substrate.” Composites, Part B 127: 196–214. https://doi.org/10.1016/j.compositesb.2017.06.028.
Lignola, G. P., M. D. Ludovico, A. Prota, M. A. Aiello, A. Cascardi, G. Castori, and M. Corradi. 2018. “Design rules for in-plane shear strengthening of masonry with FRCM.” In Proc., 9th Int. Conf. on Fiber-Reinforced Polymer (FRP) Composites in Civil Engineering, 114–122. Paris, France: IIFRC (International Institute for FRP in Construction).
Luechinger, P., and J. Fischer. 2015. “New European technical rules for the assessment and retrofitting of existing structures.” In JRC science and policy report, edited by S. Dimova, A. Pinto, P. Luechinger, and S. Denton. Luxembourg: Publications Office of the European Union.
Magenes, G., and G. M. Calvi. 1997. “In-Plane seismic response of brick masonry walls.” Earthquake Eng. Struct. Dyn. 26 (11): 1091–1112. https://doi.org/10.1002/(SICI)1096-9845(199711)26:11%3C1091::AID-EQE693%3E3.0.CO;2-6.
Magenes, G., A. Penna, A. Galasco, and M. Da Paré. 2010. “In-plane cyclic shear tests of undressed double-leaf stone masonry panels.” In Proc., 8th Int. Masonry Conf. Dresden, Germany: International Masonry Society.
Mazzotti, C., F. Ferretti, B. Ferracuti, and A. Incerti. 2016. “Diagonal compression tests on masonry panels strengthened by FRP and FRCM.” In Structural analysis of historical constructions-anamnesis, diagnosis, therapy, controls, edited by K. V. Balen and E. Verstrynge. London: Taylor & Francis.
Menna, C., D. Asprone, M. Durante, A. Zinno, A. Balsamo, and A. Prota. 2015. “Structural behavior of masonry panels strengthened with an innovative hemp fiber composite grid.” Constr. Build. Mater. 100: 111–121. https://doi.org/10.1016/j.conbuildmat.2015.09.051.
Mercedes, L., E. Bernat-Maso, and L. Gil. 2020. “In-plane cyclic loading of masonry walls strengthened by vegetal-fabric-reinforced cementitious matrix (FRCM) composites.” Eng. Struct. 221: 111097. https://doi.org/10.1016/j.engstruct.2020.111097.
Mercedes, L., L. Gil, and E. Bernat-Maso. 2018. “Mechanical performance of vegetal fabric reinforced cementitious matrix (FRCM) composites.” Constr. Build. Mater. 175: 161–173. https://doi.org/10.1016/j.conbuildmat.2018.04.171.
Mustafaraj, E., and Y. Yardim. 2018. “In-plane shear strengthening of unreinforced masonry walls using GFRP jacketing.” Period. Polytech. Civ. Eng. 62 (2): 330–336. https://doi.org/10.3311/PPci.11311.
NTC (Norme Tecniche per le Costruzioni). 2018. Technical code for constructions. Italian building code. NTC18. Rome: Ministry of Transportation and Infrastructures.
Olivito, R. S., O. A. Cevallos, and A. Carrozzini. 2014. “Development of durable cementitious composites using sisal and flax fabrics for reinforcement of masonry structures.” Mater. Des. 57: 258–268. https://doi.org/10.1016/j.matdes.2013.11.023.
Olivito, R. S., R. Codispoti, and O. A. Cevallos. 2016. “Bond behavior of flax-FRCM and PBO-FRCM composites applied on clay bricks: Experimental and theoretical study.” Compos. Struct. 146: 221–231. https://doi.org/10.1016/j.compstruct.2016.03.004.
Papanicolaou, C. C., T. C. Triantafillou, and P. R. Fabregat. 2015. “Increase of load-carrying capacity of masonry with textile reinforced rendering.” [In German.] Mauerwerk 19: 40–51. https://doi.org/10.1002/dama.201500647.
Papanicolaou, C., T. Triantafillou, and M. Lekka. 2011. “Externally bonded grids as strengthening and seismic retrofitting materials of masonry panels.” Constr. Build. Mater. 25 (2): 504–514. https://doi.org/10.1016/j.conbuildmat.2010.07.018.
Parisi, F., I. Iovinella, A. Balsamo, N. Augenti, and A. Prota. 2013. “In-plane behavior of tuff masonry strengthened with inorganic matrix–grid composites.” Composites, Part B 45 (1): 1657–1666. https://doi.org/10.1016/j.compositesb.2012.09.068.
Prota, A., G. Marcari, G. Fabbrocino, G. Manfredi, and C. Aldea. 2006. “Experimental in-plane behavior of tuff masonry strengthened with cementitious matrix–grid composites.” J. Compos. Constr. 10 (3): 223–233. https://doi.org/10.1061/(ASCE)1090-0268(2006)10:3(223).
Raza, S., M. K. I. Khan, S. J. Menegon, H.-H. Tsang, and J. L. Wilson. 2019. “Strengthening and repair of reinforced concrete columns by jacketing: State-of-the-art review.” Sustainability 11: 3208. https://doi.org/10.3390/su11113208.
Rota, M., A. Penna, and G. Magenes. 2014. “A framework for the seismic assessment of existing masonry buildings accounting for different sources of uncertainty.” Earthquake Eng. Struct. Dyn. 43 (7): 1045–1066. https://doi.org/10.1002/eqe.2386.
Sen, T., and H. N. Jagannatha Reddy. 2013. “Strengthening of RC beams in flexure using natural jute fiber textile reinforced composite system and its comparative study with CFRP and GFRP strengthening systems.” Int. J. Sustainable Built Environ. 2 (1): 41–55. https://doi.org/10.1016/j.ijsbe.2013.11.001.
Sutton, M. A., J.-J. Orteu, and H. W. Schreier. 2009. Image correlation for shape, motion and deformation measurements. New York: Springer.
Thomoglou, A. K., T. C. Rousakis, D. V. Achillopoulou, and A. I. Karabinis. 2020. “Ultimate shear strength prediction model for unreinforced masonry retrofitted externally with textile reinforced mortar.” Earthquakes Struct. 19: 4411–4425. https://doi.org/10.12989/eas.2020.19.6.411.
Tomaževič, M. 1996. “Recent advances in earthquake-resistant design of masonry buildings: European perspective.” In Proc., 11th World Conf. on Earthquake Engineering. Oxford: Pergamon
Tomaževič, M. 1999. Earthquake-resistant design of masonry buildings. London, UK: Imperial College Press.
Tomaževič, M. 2009. “Shear resistance of masonry walls and eurocode 6: Shear versus tensile strength of masonry.” Mater. Struct. 42 (7): 889–907. https://doi.org/10.1617/s11527-008-9430-6.
Triantafillou, T. C. 2016. “Strengthening of existing masonry structures: Design models.” In Textile fiber composites in civil engineering, edited by T. C. Triantafillou. Cambridge, UK: Woodhead Publishing.
Triantafillou, T. C., C. G. Papanicolaou, P. Zissimopoulos, and T. Laourdekis. 2006. “Concrete confinement with textile-reinforced mortar jackets.” ACI Struct. J. 103: 28–37.
Trochoutsou, N., M. Di Benedetti, K. Pilakoutas, and M. Guadagnini. 2021a. “Mechanical characterisation of flax and jute textile-reinforced mortars.” Constr. Build. Mater. 271: 121564. https://doi.org/10.1016/j.conbuildmat.2020.121564.
Trochoutsou, N., M. Di Benedetti, K. Pilakoutas, and M. Guadagnini. 2021b. “Bond of flax textile-reinforced mortars to masonry.” Constr. Build. Mater. 284: 122849. https://doi.org/10.1016/j.conbuildmat.2021.122849.
Türkmen, Ö. S., B. T. De Vries, S. N. M. Wijte, and A. T. Vermeltfoort. 2019. “Quasi-static cyclic in-plane testing of masonry walls strengthened with a single-sided fabric-reinforced cementitious matrix overlay and flexible anchorage.” J. Build. Pathol. Rehabil. 4: 8. https://doi.org/10.1007/s41024-019-0043-y.
Wallemacq, P., and R. House. 2018. “UNISDR and CRED report: Economic Losses, Poverty and Disasters (1998–2017), United Nations Office for Disaster Risk Reduction (UNISDR) and the Centre for Research on the Epidemiology of Disasters (CRED).” Accessed March 5, 2021. http://www.emdat.be/publications.
Wang, X., C. C. Lam, and V. P. Iu. 2019. “Comparison of different types of TRM composites for strengthening masonry panels.” Constr. Build. Mater. 219: 184–194. https://doi.org/10.1016/j.conbuildmat.2019.05.179.
Wei, J., and C. Meyer. 2015. “Degradation mechanisms of natural fiber in the matrix of cement composites.” Cem. Concr. Res. 73: 1–16. https://doi.org/10.1016/j.cemconres.2015.02.019.
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Journal of Composites for Construction
Volume 26 • Issue 5 • October 2022
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© 2022 American Society of Civil Engineers.
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Received: Sep 20, 2021
Accepted: May 8, 2022
Published online: Jun 24, 2022
Published in print: Oct 1, 2022
Discussion open until: Nov 24, 2022
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