Acceptance Criteria for Tensile Characterization of Fabric-Reinforced Cementitious Matrix Systems for Concrete and Masonry Repair

Santis, Stefano De; Hadad, Houman Akbari; Basalo, Francisco De Caso y; Felice, Gianmarco de; Nanni, Antonio

doi:10.1061/(asce)cc.1943-5614.0000886

Cited by 66 publications

(51 citation statements)

References 56 publications

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“…Acceptance procedures are based either on clevis-gripped tensile tests or on the combination of clamping-gripped tensile and bond tests (De Santis et al, 2018a). Accordingly, recent studies have been devoted to the development of standardized methods for direct tensile and shear bond tests (De Santis et al, 2017a;D'Antino et al, 2018b), resulting in a RILEM recommendation (de Felice et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Lessons Learned on the Tensile and Bond Behavior of Fabric Reinforced Cementitious Matrix (FRCM) Composites

Felice

D’Antino

Santis

et al. 2020

Front. Built Environ.

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Fabric Reinforced Cementitious Matrix (FRCM) composites represent an effective, compatible, and cost-efficient solution for strengthening and retrofitting existing structures. A strong research effort was done to investigate the tensile and bond properties of these materials, as well as the overall behavior of strengthened members. A Round Robin Test was organized by Rilem TC 250-CSM on 28 FRCM composites comprising basalt, carbon, glass, PBO, aramid and steel textiles, embedded in either cement, lime or geopolymer mortars, to collect an experimental dataset and define test protocols. This paper collects the outcomes of this study to highlight fundamental properties of FRCM and to investigate the variability of test results. Grid spacing, equivalent thickness of the textiles and mechanical properties of FRCM composites, such as stiffness, tensile and bond strength, are provided. Based on the comparison of experimental outcomes, the scatter of the mechanical properties is estimated, as a consequence of the quasi-brittle behavior of the inorganic matrix and its sensitivity to manufacturing, curing and handling processes. Eventually, the influence of testing implementation, such as gripping method and measuring techniques, is outlined.

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Section: Introductionmentioning

confidence: 99%

Lessons Learned on the Tensile and Bond Behavior of Fabric Reinforced Cementitious Matrix (FRCM) Composites

Felice

D’Antino

Santis

et al. 2020

Front. Built Environ.

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“…In a recent work carried out by Malena et al (2019), it has been proposed a finite element simulation of the specimens tested in DeSantis et al (2018), by modeling both the regions of the specimens, i.e., the one not covered by steel plates and the one covered by steel plates, and also modeling the steel plates bonded to the exterior surface of the matrix.…”

Section: Analyses and Obtained Resultsmentioning

confidence: 99%

Modeling of the Tensile Behavior FRCM Systems for Repair and Strengthening Interventions of Masonry Structures

Grande

Bertolesi

Fagone

et al. 2020

Front. Built Environ.

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Fiber Reinforced Cementitious Matrix (FRCM) systems are an innovative solution for strengthening interventions of existing masonry and concrete constructions. The current literature provides interesting experimental and numerical studies which underline the potentialities of FRCMs and their specific features. Direct tensile tests are generally used for characterizing the behavior of FRCM strengthening systems. These tests particularly underline the occurrence of both matrix cracking and debonding of the reinforcement from the matrix, phenomena which particularly influence the performance of FRCM systems. The present paper aims at numerically analyzing the response of FRCM strengthening systems during tensile tests carried out throughout different setup configurations. To this end, a simple model carried out from literature and opportunely modified is presented in the paper and validated with reference to experimental case studies. Moreover, the obtained results are critically examined to emphasize the role of the proposed model for the interpretation of the results carried out from standard tensile tests.

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“…In this case, load is transferred by means of shear stress at the fiber-matrix interface and the failure occurs due to fiber slippage. As a consequence, the tensile strength of the fiber is never reached and specimens fail for lower load values [ 17 ] and the global response can be idealized as a bilinear curve. By contrast, the clamping grip method, originally proposed by Ascione et al [ 18 ] and then included in the Italian Guidelines [ 11 ], allows a more complete mechanical characterization of the TRM composites (trilinear trend).…”

Section: Experimental Databasementioning

confidence: 99%

Constitutive Models for the Tensile Behaviour of TRM Materials: Literature Review and Experimental Verification

2021

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In recent years, the scientific community has focused its interest on innovative inorganic matrix composite materials, namely TRM (Textile Reinforced Mortar). This class of materials satisfies the need of retrofitting existing masonry buildings, by keeping the compatibility with the substrate. Different recent studies were addressed to improve the knowledge on their mechanical behaviour and some theoretical models were proposed for predicting the tensile response of TRM strips. However, this task is complex due to the heterogeneity of the constituent materials and the stress transfer mechanism developed between matrix and fabric through the interface in the cracked stage. This paper presents a state-of-the-art review on the existing constitutive models for the tensile behavior of TRM composites. Literature experimental results of tensile tests on TRM coupons are presented and compared with the most relevant analytical models proposed until now. Finally, a new experimental study is presented and its results are used to further verify the reliability of the literature expressions.

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Acceptance Criteria for Tensile Characterization of Fabric-Reinforced Cementitious Matrix Systems for Concrete and Masonry Repair

Cited by 66 publications

References 56 publications

Lessons Learned on the Tensile and Bond Behavior of Fabric Reinforced Cementitious Matrix (FRCM) Composites

Lessons Learned on the Tensile and Bond Behavior of Fabric Reinforced Cementitious Matrix (FRCM) Composites

Modeling of the Tensile Behavior FRCM Systems for Repair and Strengthening Interventions of Masonry Structures

Constitutive Models for the Tensile Behaviour of TRM Materials: Literature Review and Experimental Verification

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