Intrados strengthening of brick masonry arches with different FRCM composites: Experimental and analytical investigations

Alecci, Valerio; Focacci, Francesco; Rovero, Luisa; Stipo, Gianfranco; Stefano, Mario De

doi:10.1016/j.compstruct.2017.06.023

Cited by 68 publications

(22 citation statements)

References 47 publications

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“…By analyzing the available publications, it can be noted that existing research are mainly based on systems FRP [4][5][6][7][8][9][10]. The FRCM strengthening, which include Ruredil X Mesh Gold system, is significantly less common [1][2][3]. Some publications raise issues related to the research of strength and deformation of beams reinforced by this FRCM system [11,12], but not include the effect of the initial beam load.…”

Section: The Analysis Of Existing Research and Studiesmentioning

confidence: 99%

Effectivenes of Strengthening Loaded RC Beams with FRCM System

Blikharskyy

Brózda

Selejdak

2018

Archives of Civil Engineering

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The composite materials as FRP (Fiber Reinforced Polymers), which are characterized by benefits resulting from the combination of high strength reinforcement (as carbon, glass, steel or aramid fibers) with synthetic matrix are increasingly used to reinforce existing structures. Reinforcing System as FRCM (Fibre Reinforced Cementitious Matrix), which includes, among others, Ruredil X Mesh Gold System, is much less commonly used. However, the uniform and practical methods for calculating composite reinforced structures are not determined. Especially when considering the real conditions of structure exploitation, which requires further research in this field. In the paper the initial loading level influence on the efficiency of reinforced concrete beams strengthen using system Ruredil X Mesh Gold was investigated.

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Section: The Analysis Of Existing Research and Studiesmentioning

confidence: 99%

Effectivenes of Strengthening Loaded RC Beams with FRCM System

Blikharskyy

Brózda

Selejdak

2018

Archives of Civil Engineering

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“…has been analyzed in several papers [14,[28][29][30][31][32]. In References [16][17][18]25], it is shown that the failure load of strengthened arches can be analytically evaluated with the approach of the limit analysis. This requires the knowledge of the fiber debonding strain, i.e., the fibers strain associated with debonding at the fiber-matrix interface.…”

Section: Comparison With Arches Strengthened With Cementitious and Pomentioning

confidence: 99%

“…A comparison of the specific effectiveness of the strengthening of the composite materials considered in this experimental work can be performed considering the parameter ∆f defined by Equation (1) ( Table 3). ∆f is representative of the strengthening effectiveness of the composite materials even though the collapse of the arches was always associated with the shear force, since the composite materials bonded on the surface of an arch produces an increase in both the flexural and shear capacity of the strengthened cross-sections, as observed in References [17,25]. It can be observed A comparison of the specific effectiveness of the strengthening of the composite materials considered in this experimental work can be performed considering the parameter ∆f defined by Equation (1) ( Table 3).…”

Section: Comparison With Arches Strengthened With Cementitious and Pomentioning

confidence: 99%

“…In particular, the paper deals with an experimental campaign on brick masonry arches strengthened at the extrados with Basalt-FRLM. The structural behavior of Basalt-FRLM-strengthened arches is analyzed and compared with the structural behavior of un-strengthened arches and arches strengthened with FRP and FRCM composites tested in a previous step of this research [17,18,25]. The purpose of this research is to provide the first experimental evaluation of the structural effectiveness of lime matrix composite materials for strengthening masonry structures, and to compare it with the effectiveness which can be achieved with more traditional composite materials such as FRPs and FRCMs.…”

Section: Introductionmentioning

confidence: 99%

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Strengthening Masonry Arches with Lime-Based Mortar Composite

et al. 2017

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In recent decades, many strengthening interventions on masonry elements were performed by using fiber reinforced polymers (FRPs). These advanced materials proved to be effective to increase the load-carrying capacity of masonry elements and to improve their structural behavior, avoiding the most critical failure modes. Despite the advantages of this technique compared to more traditional methods, FRP systems have disadvantages related to their low resistance to high temperatures, impossibility of application on wet surfaces, low permeability, and poor compatibility with masonry supports. Therefore, composite materials made of a fiber textile embedded in an inorganic matrix were recently proposed as alternatives to FRPs for strengthening historic masonry constructions. These composite materials are easier to install, have higher resistance to high temperatures, and permit higher vapor permeability than FRPs. The inorganic matrix is frequently a cement-based mortar, and the composite materials made of a fiber textile embedded in a cement-based mortar are usually identified as FRCM (fabric reinforced cementitious matrix) composites. More recently, the use of natural lime mortar as an inorganic matrix has been proposed as an alternative to cement-based mortars when historic compatibility with the substrate is strictly required, as in case of restoration of historic buildings. In this paper, the effectiveness of a fabric made of basalt fibers embedded in lime mortar matrix (Basalt-FRLM) for the strengthening of masonry arches is investigated. An experimental investigation was performed on 1:2 scaled brick masonry arches strengthened at the extrados with a layer of Basalt-FRLM and tested under vertical load. The results obtained are compared with previous results obtained by the authors by testing masonry arches strengthened at their extrados with FRCM and FRP composites. This investigation highlights the effectiveness of Basalt-FRLM in increasing load-currying and the displacement capacities of masonry arches. The Basalt-FRLM-strengthened arch exhibited higher displacement capacity when compared to arches strengthened with polymeric and cementitious matrix composites.

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“…should be carefully analyzed and retrofitted in the case proper safety levels are not guaranteed. For generic masonry structures traditional (tie-rods) and modern (FRP) [1,2] T techniques can be used. In particular, out-of-plane modes represent the most vulnerable modes, regardless of the applied load, and therefore they should be analyzed with proper modelling approaches (kinematic [3][4][5], finite element [6][7][8] and rocking [9] analyses).…”

Section: Introductionmentioning

confidence: 99%

Estimation of tensile mechanical parameters of existing masonry through the analysis of the collapse of Volterra’s urban walls

Puppio

Giresini²

2019

Frattura Ed Integrità Strutturale

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In this work, numerical analyses on the Volterra's ancient walls are performed to understand the causes of a collapse occurred after an extreme rainfall (2014) and to identify the mechanical parameters that most influenced it. The stretch of collapsed wall is modelled with finite elements by distinguishing the material composing the multi-leaf wall. Non-linear static analyses are carried out with the DIANA software considering different levels of hydraulic head up to reach the collapse of the structure. The impact on the failure modes of the involved parameters, such as tensile strength, fracture energy and shear strength, are discussed. Tensile strength is found as the most relevant parameter in the failure mode. Finally, a 3-dim model is presented, and the results show a very good agreement with the failure mode actually occurred in terms of both failure modes and displacement fields. The safety evaluation is performed in the as-built and the retrofitted configuration, consisting in the wall restrained by tie-rods. The results show a significant increasing of the safety level of the retrofitted configuration showing a considerable improvement not only in terms of limit equilibrium but also in terms of structural capacity of the wall.

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Intrados strengthening of brick masonry arches with different FRCM composites: Experimental and analytical investigations

Cited by 68 publications

References 47 publications

Effectivenes of Strengthening Loaded RC Beams with FRCM System

Effectivenes of Strengthening Loaded RC Beams with FRCM System

Strengthening Masonry Arches with Lime-Based Mortar Composite

Estimation of tensile mechanical parameters of existing masonry through the analysis of the collapse of Volterra’s urban walls

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