Experimental Behavior of Masonry Vaults Strengthened with Thin Extradoxal or Intradoxal Layer of Fiber Reinforced Lime Mortar

Abstract:

The results of a first experimental research program on masonry vaults strengthened by means of GFRP meshes embedded in a thin layer of lime mortar, are herein presented. The tests were designed to reproduce the pattern of a transversal horizontal load proportional to the vault self-weight. The typical simplified loading patterns generally used for the experimental tests concern concentrated vertical loads at the crown section or at 1/4 of the span, but some numerical investigations evidenced that these configurations are not able to reproduce the actual behavior and the effectiveness of the reinforcement. So a specific rig was designed to apply the horizontal load pattern.Solid brick masonry barrel vaults were considered (thickness 120 mm, arch span 4000 mm, arch rise/radius = 0.75). Three quasi-static cyclic tests were performed: the first concerned an unreinforced vault, the second a vault reinforced at the extrados through the application of a mortar coating reinforced with a GFRP mesh and the third reinforced at the intrados surface with the same technique. The experimental results demonstrated the technique effectiveness and the important increment of ductility of the vaults.

• Periodical: Key Engineering Materials (Volume 747)
• Pages: 274-281
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.747.274
• Online since: July 2017
• Authors: Natalino Gattesco, Ingrid Boem*, Alessandra Gubana, Davide Menegon, Norman Bello, Allen Dudine
• Keywords: Composite Materials, Experimental Tests, Glass-Fibers, Masonry Structures, Seismic Retrofit, Structural Rehabilitation, Vaults

References

[1] S.K. Sumon, N. Ricketts, Strengthening of masonry arch bridges, in: C. Melbourne (Eds. ), Arch Bridges, Thomas Telford, London, 1995, pp.501-508.

DOI: 10.1680/ab.20481.0050

[2] L. Caleca, A. Vecchi, Tecnologie di consolidamento delle strutture murarie, Dario Flaccovio, Palermo, (1983).

[3] M.R. Valluzzi, M. Valdemarca, C. Modena, Behavior of Brick Masonry Vaults Strengthened by FRP Laminates, J. of Comp. for Cons. 5, 3 (2001): 163-169.

DOI: 10.1061/(asce)1090-0268(2001)5:3(163)

[4] P. Foraboschi, Strength assessment of masonry arch retrofitted using composite reinforcements, Masonry International, 15, 1 (2001): 17–25.

[5] D. Oliveira, I. Basilio, P. Lourenço, Experimental Behavior of FRP Strengthened Masonry Arches, Journal of Composites for Construction, 14, 3 (2010): 312-322.

DOI: 10.1061/(asce)cc.1943-5614.0000086

[6] I. Cancelliere, M. Imbimbo, E. Sacco, Experimental tests and numerical modeling of reinforced masonry arches, Engineering Structures, 32 (2010): 776-792.

DOI: 10.1016/j.engstruct.2009.12.005

[7] L. Rovero, F. Focacci, G. Stipo, Structural Behavior of Arch Models Strengthened Using Fiber-Reinforced Polymer Strips of Different Lengths, J. of Comp. for Const. 7, 12 (2013): 249-258.

DOI: 10.1061/(asce)cc.1943-5614.0000325

[8] L. Bednarz, A. Gorski, J. Jasienko, E. Rusinsk, Simulations and analyses of arched brick structures, Automation in Construction 20 (2011): 741–754.

DOI: 10.1016/j.autcon.2011.01.005

[9] L. Hojdys, P. Krajewski, Experimental tests on strengthened and unstrengthened masonry vault with backfill, Journal of Heritage Conservation, 32 (2012): 105-108.

[10] P. Girardello, F. Da Porto, C. Modena, M.R. Valluzzi, Comportamento sperimentale di volte in muratura rinforzate con materiali compositi a matrice inorganica, Proc. of the XV Conf. ANIDIS L, ingegneria sismica in Italia, Padua 2013, 30th June - 4th July.

[11] L. Garmendia, P. Larrinaga, R. San-Mateos, J.T. San-José, Strengthening masonry vaults with organic and inorganic composites: an experimental approach, Materials and Design 85 (2015): 102–114.

DOI: 10.1016/j.matdes.2015.06.150

[12] N. Gattesco, I. Boem, Experimental and analytical study to evaluate the effectiveness of an in-plane reinforcement for masonry walls using GFRP meshes, Const and Build. Mat. 30 (2015): 88-94-104.

DOI: 10.1016/j.conbuildmat.2015.04.014

[13] N. Gattesco, I. Boem, Out-of-plane behaviour of masonry walls strengthened with a GFRP reinforced mortar coating, Proc. of the 9th Int. Masonry Conference, Guimaraes 2014, 7-9 July.

DOI: 10.1201/9781003098508-88

[14] N. Gattesco, I. Boem, Numerical Simulation of the Out-of-plane Performance of Masonry Walls Strenghtened with a GFRP Reinforced Mortar, in: Proc. of the Fifteenth Int. Conf. on Civil, Structural and Environmental Engineering Computing Civil-Comp 2015, Prague 2015, 1-4 September.

DOI: 10.4203/ccp.108.78

[15] N. Gattesco, I. Boem, Strengthening of masonry vaults through a thin extradoxal layer of fiber reinforced lime mortar, Proc. of the 10th Int. Conf. on Structural Analysis of Historical Constructions – SAHC, Leuven 2016, 13-15 September.

DOI: 10.1201/9781315616995-145

[16] L. Anania, A. Badalà, G. D'Agata, The post strengthening of the masonry vaults by the X-Wrap technique based on the use of C-FRP, Construction and Building Materials, 47 (2013): 1053–1068.

DOI: 10.1016/j.conbuildmat.2013.05.012

[17] A. Borri, P. Casadei, G. Castori, J. Hammond, Strengthening of Brick Masonry Arches with Externally Bonded Steel Reinforced Composites, Journal of Composites for Construction, 13 , 6 (2009): 468-475.

DOI: 10.1061/(asce)cc.1943-5614.0000030

[18] M. Zlamal, P. Stepanek, Additional strengthening of masonry vaulted structures by nonprestressed reinforcement, Architecture Civil Engineering Environment 2, 3 (2009): 85-90.

[19] EN 772-1: 2011+A1: 2015. Methods of test for masonry units - Part 1: Determination of compressive strength.

[20] EN 196-1: 2005. Methods of testing cement - Part 1: Determination of strength.

[21] EN 12390-13: 2013. Testing hardened concrete - Part 13: Determination of secant modulus of elasticity in compression.

DOI: 10.3403/30397532

[22] N. Gattesco, I. Boem, Characterization tests of GFRM coating as a strengthening technique for masonry buildings, Composite Structures, 165 (2017): 209-222.

DOI: 10.1016/j.compstruct.2017.01.043