Analytical model for masonry walls strengthened with vegetal fabric reinforced cementitious matrix (FRCM) composites and subjected to cyclic loads

Abstract

Masonry is one of the eldest construction systems in the building industry, currently in use because some advantages like compressive capacity, traditional aesthetics, low cost and good practices. However, damages recorded in walls as a result of cyclic loads, have given rise to an important development in the area of strengthening and rehabilitation of this type of structural element. To counteract this problem, the vegetal FRCM arises as a strengthening competitive system for the improvement of the mechanical properties of masonry walls. In this study, an analytical model evaluates the behaviour of walls strengthened with FRCM. The model is compared with existing codes and it is validated with experimental results of shear diagonal-compression tests and shear under cyclic loads. It proved to be an effective calculation tool, useful enough to reproduce the behaviour of masonry walls strengthened with FRCM, but limited to failures not related with debonding neither sliding of FCRM material and substrate.

Numerical simulation of masonry walls strengthened with vegetal fabric reinforced cementitious matrix (FRCM) composites and subjected to cyclic loads

“…This study represents the continuation of experimental and analytical studies previously presented by the authors [18] [19]. Therefore, the main objective of this study is to develop numerical models capable to reproduce the experimental and analytical behavior of walls strengthened with FRCM of vegetal fibres.…”

Analytical Approach and Numerical Simulation of Reinforced Concrete Beams Strengthened with Different FRCM Systems

“…To define the mechanical properties of each FRCM (shell elements), it was necessary to implement FRCM models (fabric and mortar) and to determine its tensile behavior with the procedure presented in [ 40 ].…”

“…For the interaction between the shell elements (FRCMs) and deformable solids (the concrete beam), a tie connection was used. This approach was considered in other studies [ 40 , 41 ]. A tie connection is a link restriction that allows merging two regions, even though the meshes created on the surfaces of the regions may be different, so complete beam–FRCM bonding can be assumed.…”

Experimental Study on Seismic Performance of Confined Masonry Walls With Window Openings Strengthened by Using Hybrid-Fiber Modified Reactive Powder Concrete

“…A composite system consisting of continuous multiaxial hybrid fibers embedded in the mortar-based matrix was proposed and denominated Textile Reinforced Mortar (TRM). Internationally, the inorganic composite systems reinforced by textile are also named Textile Reinforced Concrete/Cement (TRC) (Bisby et al, 2011;Cheng et al, 2020), Fiber Reinforced Cementitious Matrix/Mortar (FRCM) (Del Zoppo et al, 2019a;Mercedes et al, 2020), Cementitious Matrix Grid (CMG) (Prota et al, 2006), Composite Reinforced Mortar (CRM) (Del Zoppo et al, 2019b), or Inorganic Matrix-Grid (IMG) (Augenti et al, 2011;Parisi et al, 2013). The research has shown that the application of TRM is served as an alternative to the application of FRP.…”