Cyclic Test on a Full-Scale Unreinforced Masonry Building Repaired with Steel Fiber-Reinforced Mortar Coating
Publication: Journal of Structural Engineering
Volume 147, Issue 6
Abstract
The present work reports the results of two quasi-static reverse cyclic tests performed on an unreinforced hollow clay block masonry building before and after repairing with a single thick layer of mortar applied on the façades. Unlike traditional coating-based retrofitting techniques, the one proposed herein adopts a cement-based mortar reinforced with short high-strength steel fibers randomly diffused in the mortar matrix. In order to assess the effectiveness of the strengthening intervention, a preliminary cyclic test was carried out on the unstrengthened building in order to predamage masonry. The experimental results showed that the repaired structure exhibited a significant improvement of seismic behavior both at the serviceability and ultimate limit state conditions. Moreover, based on the observed ultimate ductility of the retrofitted building, some considerations on the behavior factor are reported.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The research work is part of the Health&Wealth project “Sismacomf” supported by the University of Brescia and by Tecnologia e Ricerca Italiana S.r.l. (TRI S.r.l). The financial contribution provided by the RELUIS-DPC project 2014–2018 is gratefully acknowledged. Special thank goes to Eng.s Silvia Martini, Roberto Vecchi, and Jessica Paterlini for their contribution to the tests execution and data postprocessing.
References
ASTM. 2002. Standard test method for diagonal tension (shear) in masonry assemblages. ASTM E519-02. West Conshohocken, PA: ASTM.
Benedetti, A., F. Marani, and M. Ramalho. 2010 “Mechanical properties of masonry with environmental degradation.” In Proc., 8th Int. Masonry Conf., 1–8. Dresden, Germany: Technische Universitat Dresden.
Benedetti, D., P. Carydis, and P. Pezzoli. 1998. “Shaking table tests on 24 simple masonry buildings.” Earthquake Eng. Struct. Dyn. 27 (1): 67–90. https://doi.org/10.1002/(SICI)1096-9845(199801)27:1%3C67::AID-EQE719%3E3.0.CO;2-K.
Berrocal, C. G., I. Fernandez, K. Lundgren, and I. Löfgren. 2017. “Corrosion-induced cracking and bond behaviour of corroded reinforcement bars in SFRC.” Composites, Part B 113 (Mar): 123–137. https://doi.org/10.1016/j.compositesb.2017.01.020.
Carozzi, F. G., G. Milani, and C. Poggi. 2014. “Mechanical properties and numerical modeling of fabric reinforced cementitious matrix (FRCM) systems for strengthening of masonry structures.” Compos. Struct. 107 (Jan): 711–725. https://doi.org/10.1016/j.compstruct.2013.08.026.
CEN (European Committee for Standardization). 1998. Methods of test for masonry—Part 1: Determination of compressive strength. EN 1052-1. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2004a. Eurocode 2; Design of concrete structures—Part 1: General rules and rules for buildings. EN 1992-1-1. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2004b. Eurocode 8; Design of structures for earthquake resistance—Part 1: General rules, seismic actions and rules for buildings. EN 1998-1. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2005. Eurocode 8; Design of structures for earthquake resistance—Part 3: Assessment and retrofitting of buildings. EN 1998-3. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2006. Methods of test for mortar for masonry—Part 11: Determination of flexural and compressive strength of hardened mortar. EN 1015-11. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2007. Test method for metallic fibre concrete—Measuring the flexural tensile strength (limit of proportionality (LOP), residual). EN 14651. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2015. Methods of test for masonry units—Part 1: Determination of compressive strength. EN 772-1. Brussels, Belgium: CEN.
Chopra, A. K. 2001. Dynamics of structures theory and applications to earthquake engineering. Englewood, CO: Prentice Hall.
D’Ambrisi, A., L. Feo, and F. Focacci. 2013. “Experimental and analytical investigation on bond between Carbon-FRCM materials and masonry.” Composites, Part B 46 (Mar): 15–20. https://doi.org/10.1016/j.compositesb.2012.10.018.
Dehghani, A., F. Nateghi-Alahi, and G. Fischer. 2015. “Engineered cementitious composites for strengthening masonry infilled reinforced concrete frames.” Eng. Struct. 105 (Dec): 197–208. https://doi.org/10.1016/j.engstruct.2015.10.013.
Facconi, L., A. Conforti, F. Minelli, and G. A. Plizzari. 2015. “Improving shear strength of unreinforced masonry walls by nano-reinforced fibrous mortar coating.” Mater. Struct. 48 (8): 2557–2574. https://doi.org/10.1617/s11527-014-0337-0.
Facconi, L., F. Minelli, S. Lucchini, and G. Plizzari. 2020. “Experimental study of solid and hollow clay brick masonry walls retrofitted by steel fiber-reinforced mortar coating.” J. Earthquake Eng. 24 (3): 381–402. https://doi.org/10.1080/13632469.2018.1442264.
FEMA. 2000. Pre-standard and commentary for the seismic rehabilitation of buildings. FEMA 356. Washington, DC: FEMA.
fib (International Federation for Structural Concrete). 2012. Model Code 2010, final complete draft. Lausanne, Switzerland: fib.
Frumento, S., G. Magenes, and P. Morandi. 2009. “Valutazione del fattore di struttura ‘q’ per differenti tipologie di muratura in laterizio.” [In Italian.] In Proc., Atti del XIII Convegno di Ingegneria Sismica ANIDIS. Bologna, Italy: Università di Bologna.
Gattesco, N., I. Boem, and A. Dudine. 2015. “Diagonal compression tests on masonry walls strengthened with a GFRP mesh reinforced mortar coating.” Bull. Earthquake Eng. 13 (6): 1703–1726. https://doi.org/10.1007/s10518-014-9684-z.
Giaretton, M., D. Dizhur, E. Garbin, J. M. Ingham, and F. da Porto. 2018. “In-plane strengthening of clay brick and block masonry walls using textile-reinforced mortar.” J. Compos. Constr. 22 (5): 04018028. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000866.
Granju, J.-L., and S. U. Balouch. 2005. “Corrosion of steel fibre reinforced concrete from the cracks.” Cem. Concr. Res. 35 (3): 572–577. https://doi.org/10.1016/j.cemconres.2004.06.032.
Guerrini, G., F. Graziotti, A. Penna, and G. Magenes. 2017. “Improved evaluation of inelastic displacement demands for short-period masonry structures.” Earthquake Eng. Struct. Dyn. 46 (9): 1411–1430. https://doi.org/10.1002/eqe.2862.
Hutchison, D., P. Yong, and G. McKenzie. 1984. “Laboratory testing of a variety of strengthening solutions for brick masonry wall panels.” In Proc., 8th World Conf. on Earthquake Engineering (8WCEE), 575–582. Miyagi, Japan: World Conference on Earthquake Engineering.
Kahn, L. 1984. “Shotcrete retrofit for unreinforced brick masonry.” In Proc., 8th World Conf. on Earthquake Engineering (8WCEE), 583–590. Miyagi, Japan: World Conference on Earthquake Engineering.
Karavasilis, T. L., N. Bazeos, and D. E. Beskos. 2007. “Behavior factor for performance-based seismic design of plane steel moment resisting frames.” J. Earthquake Eng. 11 (4): 531–559. https://doi.org/10.1080/13632460601031284.
Koutas, L., S. N. Bousias, and T. C. Triantafillou. 2015. “Seismic strengthening of masonry-infilled RC frames with TRM: Experimental study.” J. Compos. Constr. 19 (2): 04014048. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000507.
Koutromanos, I., M. Kyriakides, A. Stavridis, S. Billington, and P. B. Shing. 2013. “Shake-table tests of a 3-story masonry-infilled RC frame retrofitted with composite materials.” J. Struct. Eng. 139 (8): 1340–1351. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000689.
Lin, Y.-W., L. Wotherspoon, A. Scott, and J. M. Ingham. 2014. “In-plane strengthening of clay brick unreinforced masonry wallettes using ECC shotcrete.” Eng. Struct. 66 (May): 57–65. https://doi.org/10.1016/j.engstruct.2014.01.043.
Lourenço, P. B., N. Mendes, L. F. Ramos, and D. V. Oliveira. 2011. “Analysis of masonry structures without box behavior.” Int. J. Archit. Heritage 5 (4–5): 369–382. https://doi.org/10.1080/15583058.2010.528824.
Lucchini, S. 2019. “Steel fiber reinforced mortar for seismic retrofitting of unreinforced masonry buildings.” Ph.D. thesis, Dept. of Civil, Architectural, Environmental Engineering and of Mathematics, Univ. of Brescia.
Lucchini, S. S., L. Facconi, F. Minelli, and G. Plizzari. 2020. “Retrofitting unreinforced masonry by steel fiber reinforced mortar coating: Uniaxial and diagonal compression tests.” Mater. Struct. 53: 144. https://doi.org/10.1617/s11527-020-01574-w.
Lucchini, S. S., L. Facconi, F. Minelli, and G. A. Plizzaria. 2017. “Full scale tests on hollow brick masonry walls repaired with steel fiber reinforced mortar coating.” [In Italian.] In Proc., Atti del XVII Convegno Nazionale L’Ingegneria sismica in Italia—ANIDIS 2017, 138–144. Pistoia, Italy: Pisa University Press.
Magenes, G. 2000. “A method for pushover analysis in seismic assessment of masonry buildings.” In Vol. 42 of Proc., 12th World Conf. on Earthquake Engineering. Upper Hutt, New Zealand: New Zealand Society for Earthquake Engineering.
Messali, F., G. Metelli, and G. Plizzari. 2017. “Experimental results on the retrofitting of hollow brick masonry walls with reinforced high performance mortar coatings.” Constr. Build. Mater. 141 (Jun): 619–630. https://doi.org/10.1016/j.conbuildmat.2017.03.112.
Moon, F. L., T. Yi, R. T. Leon, and L. F. Kahn. 2007. “Testing of a full-scale unreinforced masonry building following seismic strengthening.” J. Struct. Eng. 133 (9): 1215–1226. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:9(1215).
NTC (Norme Tecniche per le Costruzioni). 2018. Decreto ministeriale del 17/01/18–Aggiornamento delle Norme Tecniche per le Costruzioni, 17 gennaio 2018. [In Italian.] Rome: Ministero delle Infrastrutture.
Oliveira, D. V., I. Basilio, and P. B. Lourenço. 2011. “Experimental bond behavior of FRP sheets glued on brick masonry.” J. Compos. Constr. 15 (1): 32–41. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000147.
Paulay, T., and M. N. Priestley. 1992. Seismic design of reinforced concrete and masonry buildings, 768. New York: Wiley.
Plizzari, G. 1999. “Bond and splitting crack development in normal and high-strength fiber-reinforced concrete.” In Proc., 13th Engineering Mechanics Division Conf.—EMD99. Reston, VA: ASCE.
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).
Sadoon, A., M. K. Rahman, M. H. Baluch, M. Al-Osta, and M. Alshugaa. 2016. “Behavior of masonry wall with steel-fiber reinforced mortar for joints and plaster.” In Proc., 16th Int. Brick and Block Masonry Conf., 1863–1869. Boca Raton, FL: CRC Press.
Sevil, T., M. Baran, T. Bilir, and E. Canbay. 2011. “Use of steel fiber reinforced mortar for seismic strengthening.” Constr. Build. Mater. 25 (2): 892–899. https://doi.org/10.1016/j.conbuildmat.2010.06.096.
Tiberti, G., F. Germano, A. Mudadu, and G. A. Plizzari. 2018. “An overview of the flexural post-cracking behavior of steel fiber reinforced concrete.” Struct. Concr. 19 (3): 695–718. https://doi.org/10.1002/suco.201700068.
Tomaževič, M. 2007. “Damage as a measure for earthquake-resistant design of masonry structures: Slovenian experience.” Can. J. Civ. Eng. 34 (11): 1403–1412. https://doi.org/10.1139/L07-128.
Tomaževič, M., I. Klemenc, and P. Weiss. 2009. “Seismic upgrading of old masonry buildings by seismic isolation and CFRP laminates: A shaking-table study of reduced scale models.” Bull. Earthquake Eng. 7 (1): 293–321. https://doi.org/10.1007/s10518-008-9086-1.
Tomaževič, M., and P. Weiss. 1994. “Seismic behavior of plain- and reinforced-masonry buildings.” J. Struct. Eng. 120 (2): 323–338. https://doi.org/10.1061/(ASCE)0733-9445(1994)120:2(323).
Tomaževič, M., and P. Weiss. 2010. “Displacement capacity of masonry buildings as a basis for the assessment of behavior factor: An experimental study.” Bull. Earthquake Eng. 8 (6): 1267–1294. https://doi.org/10.1007/s10518-010-9181-y.
UNI (Ente nazionale italiano di unificazione). 2013. Testing hardened concrete—Part 13: Determination of secant modulus of elasticity in compression. [In Italian.] UNI EN 12390-13. Rome: UNI.
Zampieri, P., N. Simoncello, J. Gonzalez Libreros, and C. Pellegrino. 2020. “Bond behavior of steel fiber-reinforced mortar (SFRM) applied onto masonry substrate.” Arch. Civ. Mech. Eng. 20 (3): 1–20. https://doi.org/10.1007/s43452-020-00090-6.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 6 • June 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: May 7, 2020
Accepted: Jan 22, 2021
Published online: Mar 23, 2021
Published in print: Jun 1, 2021
Discussion open until: Aug 23, 2021
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