Reinforced Jacketing of Wall Panels: A Comparative Experimental Investigation

Abstract:

This paper presents the results of a laboratory investigation carried out on reinforced mortar plates. Reinforced mortar plates are often applied for shear reinforcement of wall panels. Different reinforcement materials have been embedded into the mortar plates: GFRP (Glass Fiber Reinforced Polymers) grids, fiberglass fabrics and welded steel-wire meshes. This is the first stage in the development of a new type of GFRP-reinforced mortar jacketing, that will provide a solution to enhance the lateral capacity of historic buildings. Such reinforced plates can also be used in applications on new masonry constructions where buildings with damaged or cracked wall panels need to be repaired or retrofitted. The mortar plates were built from commercially available GFRP grids and fabrics that were embedded into the mortar to form a reinforced-mortar square structure of 1 m with a thickness of 30 mm. The plates were tested in the laboratory, under quasi-static patch loads that exceeded the expected seismic loads. The goal of the testing program was to assess the design and construction techniques used, with a view to designing the reinforcement of a historic building. The laboratory tests demonstrated that the GFRP-reinforced plates had sufficient stiffness and strength to function effectively. By comparing the results with the more traditional steel-wire mesh reinforcement, it was also possible to perform a comparative analysis.

• Periodical: Key Engineering Materials (Volume 817)
• Pages: 536-543
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.817.536
• Online since: August 2019
• Authors: Romina Sisti, Antonio Borri, Marco Corradi*, Allen Dudine
• Keywords: Fiberglass, Historic Masonry, Laboratory Testing, Lateral Capacity

References

[1] M. Corradi, A. Borri, A. Vignoli, Experimental evaluation of in-plane shear behavior of mason-ry walls retrofitted using conventional and innovative methods, Masonry International 21 (2008) 29-42.

[2] A. Borri, M. Corradi, E. Speranzini, A. Giannantoni, Reinforcement of historic masonry with high strength steel cords, Masonry International 23 (2010) 79-90.

DOI: 10.1201/9781003098508-10

[3] R. Sisti, G. Castori, M. Corradi, A. Borri, The Reticulatus method for shear strengthening of fair-faced masonry, Bull. Earth. Eng. (2016) 1-25.

DOI: 10.1007/s10518-016-0006-5

[4] D.F. D'Ayala, S. Paganoni, Assessment and analysis of damage in L'Aquila historic city centre after 6th April 2009, Bull. Earth. Eng. 9 (2011) 81-104.

DOI: 10.1007/s10518-010-9224-4

[5] D.V. Oliveira, I. Basilio, P.B. Lourenço, Experimental bond behavior of FRP sheets glued on brick masonry, J. Compos. Constr. 15 (2010) 32-41.

DOI: 10.1061/(asce)cc.1943-5614.0000147

[6] C. Caggegi, G. Ferrara, E. Lanoye, Đ.B. Nguyễn, A. Gabor, E. Martinelli Experimental Study on the Effectiveness of Masonry-Basalt TRM Reinforced Systems Characterized by Different Fiber Grid Densities, Key Engineering Materials 747 (2017) 266-273.

DOI: 10.4028/www.scientific.net/kem.747.266

[7] A.C. Isfeld, E. Moradabadi, D.F. Laefer, Uncertainty analysis of the effect of grout injection on the deformation of multi-wythe stone masonry walls, Construct. Build. Mater. 126 (2016) 661-672.

DOI: 10.1016/j.conbuildmat.2016.09.058

[8] E. Vintzileou, A. Miltiadou-Fezans, Mechanical properties of three-leaf stone masonry grouted with ternary or hydraulic lime-based grouts, Eng. Struct. 30 (2008) 2265-2276.

DOI: 10.1016/j.engstruct.2007.11.003

[9] B. Ghiassi, M. Soltani, A performance-based method for seismic evaluation of masonry walls strengthened with RC layers, January 2012, Conference: 15h WCEE, (2007).

[10] M. Ashraf, A. Khan, A. Naseer, Q. Ali, B. Alam, Seismic behavior of unreinforced and confined brick masonry walls before and after ferrocement overlay retrofitting. Int. J. Archit. Herit. 6 (2012) 665-688.

DOI: 10.1080/15583058.2011.599916

[11] ICOMOS Charter, Principles for the analysis, conservation and Structural Restoration of Architectural Heritage, Victoria Falls, Zimbabwe, October 27–31, (2003).

[12] M. Corradi, A. Borri, G. Castori, R. Sisti, Shear strengthening of wall panels through jacketing with cement mortar reinforced by GFRP grids, Compos Part B: Eng. 64 (2014) 33-42.

DOI: 10.1016/j.compositesb.2014.03.022

[13] L. Righetti, V. Edmondson, M. Corradi, A. Borri, A. Fibreglass grids as sustainable reinforcement of historic masonry, Materials 9 (2016) 603.

DOI: 10.3390/ma9070603

[14] N. Gattesco, I. Boem, A. Dudine A. Diagonal compression tests on masonry walls strengthened with a GFRP mesh reinforced mortar coating. Bull. Earthq. Eng. 13 (2015) 1703-1726.

DOI: 10.1007/s10518-014-9684-z