Strengthening of unreinforced masonry using welded wire mesh and micro-concrete – Behaviour under in-plane action

Kadam, Sachin B.; Singh, Yogendra; Li, Bing

doi:10.1016/j.conbuildmat.2013.12.033

Cited by 79 publications

(23 citation statements)

References 21 publications

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“…Generally, the strengthening overlay consists of a mortar, applied manually or mechanically. These surface treatments, as designated by Elgawady et al [1], typically incorporate different types of steel, polymers, carbon or glass fibres and fibre meshes used to enhance tensile behaviour and ductility of the strengthening overlay [2][3][4][5][6]. The application of these reinforced strengthening overlays improves both the in-plane and the out-of-plane load carrying capacity [7].…”

Section: Overlay Strengthening Techniquesmentioning

confidence: 99%

Assessment of overlay masonry strengthening system under in-plane monotonic and cyclic loading using the diagonal tensile test

Almeida

Pereira

Barros

2015

Construction and Building Materials

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h i g h l i g h t sThe efficiency of FRCM overlays was assessed as part of a masonry strengthening system. The strength increment of masonry walls was quantified by diagonal tensile tests. Monotonic and cyclic in-plane loading was applied to evaluate the behaviour of the walls.The key failure modes obtained experimentally and the basic mechanisms were examined. Experimental results were discussed and compared to the analytical model predictions. a b s t r a c tThe development of novel strengthening techniques to address the seismic vulnerability of masonry elements is gradually leading to simpler, faster and more effective strengthening strategies. In particular, the use of fabric reinforced cementitious matrix systems is considered of great potential, given the increase of ductility achieved with simple and economic strengthening procedures. To assess the effectiveness of these strengthening systems, and considering that the seismic action is involved, one important component of the structural behaviour is the in-plane cyclic response. In this work is discussed the applicability of the diagonal tensile test for the assessment of the cyclic response of strengthened masonry. The results obtained allowed to assess the contribution of the strengthening system to the increase of the load carrying capacity of masonry elements, as well as to evaluate the damage evolution and the stiffness degradation mechanisms developing under cyclic loading.

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Section: Overlay Strengthening Techniquesmentioning

confidence: 99%

Assessment of overlay masonry strengthening system under in-plane monotonic and cyclic loading using the diagonal tensile test

Almeida

Pereira

Barros

2015

Construction and Building Materials

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“…Depending on the element used (fabrics, strips, bars or meshes), the reinforcements are utilized in the mortar joint as reinforced repointing (Near Surface Mounted bars and strips -NSM), are glued directly to the masonry through either epoxy resin (Fiber Reinforced Polymers -FRP) or a thin mortar cement-based matrix (Fiber Reinforced Cementitious Matrix -FRCM) or are embedded in an inorganic mortar coating (Fiber Reinforced Mortars -FRM). Among the different available techniques [4][5][6][7][8][9][10][11][12], the use of Fiber Reinforced Mortars (FRM) or Textile Reinforced Mortars (TRM), is one of the most suitable for masonry elements. In fact, the use of inorganic matrix, instead of epoxy resins, to bond the reinforcement to the substrate ensures a better adhesion to an irregular surface such that of the masonry, provides fire resistance to the composite and protects it from UV rays and chemical agents.…”

Section: Introductionmentioning

confidence: 99%

Characterization tests of GFRM coating as a strengthening technique for masonry buildings

Gattesco

Boem

2017

Composite Structures

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Fiber Reinforced Mortars (FRM) represents a promising technique for the in-plane and out-of-plane reinforcement of existing masonry buildings, coupling effectiveness with compatibility needs. The paper focuses on a technique consisting in the application on the masonry surface of a 30 mm thick mortar coating with Glass Fiber-Reinforced Polymers (GFRP) meshes embedded, presenting and discussing the results of several characterization tests (pull-out, lap-splice, bond and tensile tests) performed so to investigate on the tensile properties and bond performances of the strengthening system, useful for correct design procedures and suitable also for numerical modeling

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“…For the tests, brick units 215×105×65 mm 3 in size were used. The mortar was a mixture Portland cement, lime, and river sand ratio of 1:2:8.…”

Section: Methodsmentioning

confidence: 99%

“…The existing methods of retrofitting unreinforced masonry buildings such as surface treatment [1], post-tensioning [2], steel cage mesh retrofitting [3], polymer mesh retrofitting [4], plastic carrier bag mesh retrofitting [5], PP-bands mesh retrofitting [6], bamboo band mesh retrofitting [7]; use of strengthening materials on masonry structures improves its lateral strength. However, some referred strengthening materials are beyond the economic ability of the common people of the developing countries.…”

Section: Introductionmentioning

confidence: 99%

Mechanical behavior of masonry strengthened with coir fiber reinforced hydraulic cement mortar as surface plaster

Rupasinghe¹,

Sathiparan²

2019

JSEAM

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Among the world population, a large proportion across the world still lives in masonry structures. The main problem in unreinforced masonry structures is its weakness against dynamic loads. This paper presents the proposal of the new retrofitting method using natural fiber added mortar as the surface plaster for masonry structures. Thus, the present study focuses on the experimental evaluation of a masonry prism with natural fiber reinforced mortar. The main reasons for the use of coconut coir as a natural fiber are richly available in locally and are fairly cheap. In this paper, the effects of coconut coir reinforced mortar mix, including different fiber content on compressive, shear and flexural bending behavior of masonry prisms is investigated through a comprehensive experimental study. Although this technique shows an average performance, due to the facts of low cost, local availability and relative simplicity of technique, this method may potentially be able to use to prevent the brittle collapse of unreinforced masonry structures under moderate seismic loading.

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Strengthening of unreinforced masonry using welded wire mesh and micro-concrete – Behaviour under in-plane action

Cited by 79 publications

References 21 publications

Assessment of overlay masonry strengthening system under in-plane monotonic and cyclic loading using the diagonal tensile test

Assessment of overlay masonry strengthening system under in-plane monotonic and cyclic loading using the diagonal tensile test

Characterization tests of GFRM coating as a strengthening technique for masonry buildings

Mechanical behavior of masonry strengthened with coir fiber reinforced hydraulic cement mortar as surface plaster

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