Textile reinforced mortar (TRM) versus FRP as strengthening material of URM walls: out-of-plane cyclic loading

Construction and Building Materials

Escrig

Aranha

et al. 2014

This work explores the feasibility of strengthening masonry with Textile Reinforced Mortar (TRM) by projecting it to save application time. Nineteen tests on masonry samples strengthened with TRM have been carried out to assess this new application method. Different mortars and fibre grids were considered for studying their influence and applicability with this new technique. Three points bending tests have been performed on the specimens to compare the flexural strength between cases with manually applied mortar (TRM) and sprayed application (TRSM) of the mortar layer. It was noticed that the strengthening mortar has a significant influence on the failure mode. Results show a remarkable (between 2 and 6 times more) productivity increase when using TRSM and a load-bearing capacity rise for the cases with larger grid spacing and projectable mortar when using TRSM instead of TRM. Greater ductility values were also observed for the TRSM cases in comparison with the analogue TRM cases (same grid and mortar).

Section: Application Of the Reinforcing Mortar Overlaymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental assessment of Textile Reinforced Sprayed Mortar strengthening system for brickwork wallettes

Construction and Building Materials

Escrig

Aranha

et al. 2014

“…The advantages of TRM in front of other possible strengthening solutions based on organic matrixes (e.g. Fibre Reinforced Polymer, FRP), have been reported in by Papanicolaou et al [6,7]. The main differences between these two strengthening systems arise from the organic/inorganic nature of the corresponding matrix.…”

Section: Introductionmentioning

confidence: 95%

Numerical analysis of the load-bearing capacity of brick masonry walls strengthened with textile reinforced mortar and subjected to eccentric compressive loading

Roca

2015

Engineering Structures

A numerical model has been implemented to simulate brick masonry walls strengthened with Textile Reinforced Mortar (TRM) and subjected to second order bending effects in order to cover the limited research in this area. Simulations have been compared with experimental cases and applied to enhance the knowledge about the influence of different strengthening variables. The model is accurate at predicting the load-bearing capacity of the walls, which might be increased by strengthening both sides. Moreover, the TRM is more effective for the most slender cases and the numerical results suggest future improvements to reproduce the wall's stiffness.

“…Although the drawbacks of this system (water vapour impermeability and insufficient mechanical compatibility with the masonry), which have been pointed out by several authors (see, for example the work by Baratta et al [13], or the articles by Papanicolaou et al [14,15]), FRP is still used for strengthening masonry structures because of its outstanding performance (justified in works like [11,12]) and the existence of consolidated guides and standards like [16,17]. In relation with the performance of the FRP, this strengthening technology is specially indicated for those interventions which require limiting the lateral deflection of the walls and look for a stiffer out-of-plane response of the structure.…”

Section: Introductionmentioning

confidence: 99%

Analysis of brick masonry walls strengthened with fibre reinforced polymers and subjected to eccentric compressive loads

Construction and Building Materials

Escrig

2015

Fibre Reinforced Polymers laminates are currently used to strengthen brick masonry walls. However, no specific evidences of the structural response of this strengthening system when brick walls are subjected to eccentric compressive loads, which might lead to second order bending effects, have been found. An experimental campaign on real-size walls has been carried out and the results have been compared with a numerical model, which predicted the observed shear/compressive masonry failure, and a new analytical approach, which has been used to accurately calculate the load-bearing capacity of the walls. Useful considerations for the strengthening design are also presented.