Experimental Study of Brick Masonry Walls Strengthened with Textile Reinforced Mortar

Abstract:

The paper presents an experimental research on the use of Textile Reinforced Mortar (TRM) for the strengthening of brick load bearing masonry walls subjected to eccentric loading. Particular attention is given to the case of slender walls and to the ability of TRM reinforcement to enhance the response of such walls against buckling failure. The research has allowed the study of the influence of different mortar and fibre grid types and the possible benefit of using anchors to improve the connection between the walls and the external reinforcement. The experimental campaign has consisted of twelve tests on full scale wall specimens using a specific testing device designed to create a hinged boundary condition at the top and bottom wall ends. It has been observed that TRM reinforcement provides a significant increase of over 100% of the initial load bearing capacity under eccentric axial load. Moreover, a stiffer and more homogeneous behavior is noticed when TRM is applied. A simplified analytical method to calculate the ultimate axial-bending combination for TRM strengthened brick masonry walls, in agreement with the experiments, is also presented.

• Periodical: Key Engineering Materials (Volume 624)
• Pages: 397-404
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.624.397
• Online since: September 2014
• Authors: Ernest Bernat-Maso, Pere Roca*, Lluis Gil
• Keywords: Brick Masonry Walls, Bucking Failure, Textile Reinforced Mortar (TRM)

References

[1] Papanicolaou CG, Triantafillou TC, Papathanasiou M, Karlos K. Textile reinforced mortar (TRM) versus FRP as strengthening material of URM walls: out-of-plane cyclic loading. Mater Struct. 41 (2007) 143-57.

DOI: 10.1617/s11527-007-9226-0

[2] Hamed E, Rabinovitch O. Lateral out-of-plane strengthening of masonry walls with composite materials. J Compos Contr. 14 (2010); 376.

DOI: 10.1061/(asce)cc.1943-5614.0000093

[3] Baratta A, Corbi O. Stress analysis of masonry vaults and static efficacy of FRP repairs. Int J Solids Struct. 44 (2007) 8028-56.

DOI: 10.1016/j.ijsolstr.2007.05.024

[4] Delorenzis L, Dimitri R, Lategola a. Reduction of the lateral thrust of masonry arches and vaults with FRP composites. Constr Build Mater. 21 (2007) 1415-30.

DOI: 10.1016/j.conbuildmat.2006.07.009

[5] Foraboschi P. Strengthening of Masonry Arches with Fiber-Reinforced Polymer Strips. J Compos Contr. 8 (2004) 191.

DOI: 10.1061/(asce)1090-0268(2004)8:3(191)

[6] Shrive N. The use of fibre reinforced polymers to improve seismic resistance of masonry. Constr Build Mater. 20 (2006) 269-77.

DOI: 10.1016/j.conbuildmat.2005.08.030

[7] 83 CAC. UNE-EN 1015-11: 2000/A1: 2007. Métodos de ensayo de los morteros para albañilería. Parte 11: Determinación de la resistencia a flexión y a compresión del mortero endurecido. AENOR, Madrid, (2007).

DOI: 10.3989/mc.1970.v20.i137.1570

[8] Bernat, E., Gil, L., Roca, P., Escrig, C., Experimental and analytical study of TRM strengthened brickwork walls under eccentric compressive loading. Construction and Building Materials 44, (2013) 35-47.

DOI: 10.1016/j.conbuildmat.2013.03.006

[9] Bernat, E. Analysis of unreinforced and TRM-strengthened brick masonry walls subjected to eccentric axial load. Ph. D. dissertation, Universitat Politècnica de Catalunya, Barcelona, (2013).

[10] Bernat, E., Gil, L., Roca, P., Sandoval, C., Experimental and numerical analysis of bending-buckling mixed failure of brickwork walls. Construction and building materials 43, 2013, 1-13.

DOI: 10.1016/j.conbuildmat.2013.01.025