Micro-mechanical FE numerical model for masonry curved pillars reinforced with FRP strips subjected to single lap shear tests

Bertolesi, Elisa; Milani, Gabriele; Fagone, Mario; Rotunno, Tommaso; Grande, Ernesto

doi:10.1016/j.compstruct.2018.06.111

Cited by 44 publications

(28 citation statements)

References 30 publications

(27 reference statements)

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“…The majority of the interface modeling approaches available in the literature for the study of the bond behavior of FRPs are based on the introduction of cohesive zones at the interface level, by usually assuming a debonding mechanism which occurs under the tangential loading only or largely dominated by this failure mode (mode II). This assumption, which results realistic for FRPs applied on substrates with a flat configuration, could be not adequate in case of applications on curved substrates where, on the contrary, a coupling between mode II and mode I mechanisms assumes a relevant role in the debonding process [29]- [34].…”

Section: Introductionmentioning

confidence: 99%

“…The validation of the proposed approach is made by considering ad-hoc experimentation carried out by the authors [33] consisting of shear-lap bond tests involving curved masonry specimens with different radius values and different strengthened configurations. Finally, a comparison with FE advanced numerical models [34] and theoretical formulas [32], both deduced from the current literature, is also presented.…”

Section: Introductionmentioning

confidence: 99%

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Coupled interface-based modelling approach for the numerical analysis of curved masonry specimens strengthened by CFRP

Grande

Fagone

Rotunno

et al. 2018

Composite Structures

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Aim of the present paper is to numerically study the bond behavior of curved masonry specimens externally strengthened by Carbon Fiber Reinforced Polymer systems (CFRP). A simple 1D-modeling approach is presented to this aim, where the coupled behavior between shear and normal stresses developing at the reinforcement/masonry interface level is specifically introduced to properly account for the role played by the curvature radius. The model is indeed enriched by the introduction of shear stress-slip laws able to account for the beneficial friction effect, when compression normal stresses develop at the interface level and the reduction of the slip strength corresponding to the de-cohesion in presence of normal stresses in tension. Considering some case studies derived from the current literature, consisting of shear-lap bond tests of curved masonry specimens characterized by different curvatures of the bonded surface and different strengthening configurations, the validation of the proposed approach is carried out. In particular, two modeling strategies are considered and critically compared: the first one, denoted as approach (A), where the presence of the mortar joints is neglected, and the second one, denoted as approach (B), where mortar joints are specifically introduced in the model. Finally, the results obtained by using the proposed simple approach are compared with those obtained from both sophisticated FE numerical models and theoretical formulas deduced form the current literature.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coupled interface-based modelling approach for the numerical analysis of curved masonry specimens strengthened by CFRP

Grande

Fagone

Rotunno

et al. 2018

Composite Structures

Self Cite

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“…Aside from addressing the issue of modelling the coexistent mortar joints and coating, this choice offered the possibility of using the same constitutive law for all of the materials involved. The ability of constitutive models, such as the concrete damage plasticity model, to simulate the behaviour of reinforcing materials has been demonstrated [25][26][27]. Here, an elastoplastic model that also incorporated damage was adopted [15].…”

Section: Presentation Of the Numerical Approachmentioning

confidence: 99%

Pushover Tests on Unreinforced Masonry Wallettes Retrofitted with an Innovative Coating: Experimental Study and Finite Element Modelling

Plassiard

Eymard²,

Alachek³

et al. 2021

Materials

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This paper investigates the mechanical contribution of an innovative coating applied on masonry wallettes compared to a traditional one. In both cases, the multifunctional coatings were insulating coatings intended for thermal refurbishment, but they could also be used to retrofit masonry. Uncoated specimens as well as coated ones were submitted to pushover tests to establish the strength gain. URM walls experienced brittle failures while the coated walls exhibited significant strength gains and strong ductility. The corresponding finite element models were developed. The behaviour of the URM walls was reproduced accurately in terms of strength and failure pattern. Models involving the coatings were used to partially retrieve the behaviour and to highlight the issues of a continuum approach.

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“…For these reasons, the properties of an equivalent homogeneous isotropic material have been defined according to the strength and Young's modulus values reported in the Italian code (CMIT 2019). The CDP model was conceived for concrete, but later, its use was extended to masonry structures with good results (Acito et al 2014;Casolo et al 2017;Valente et al 2017;Bertolesi et al 2018b;Sarhosis et al 2018;Valente and Milani 2018b, c). These materials have a similar brittle behavior, associated with two main failure mechanisms: cracking under tension and crushing under compression.…”

Section: Church Configurations and Materials Propertiesmentioning

confidence: 99%

Seismic response of a masonry church in Central Italy: the role of interventions on the roof

Papa

Tateo

Parisi

et al. 2020

Bull Earthquake Eng

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The seismic response of a medieval church in Central Italy is analyzed considering the two roof configurations, i.e., reinforced concrete and timber roofs, that the church had in different periods of its existence. Structural interventions and changes are common in the churches of this territory, where frequent earthquakes put these buildings at risk. The church studied here, St. Salvatore in Acquapagana (Serravalle di Chienti, province of Macerata), was damaged by the 1997 Umbria-Marche and the 2016 Central Italy earthquakes. Between these two seismic events, the church was repaired, and the concrete roof was substituted with a lighter timber roof. To investigate the influence of this change on the seismic response, a study was performed at the building and façade macroelement scales using the finite element model and rigid body spring model, respectively. For each approach, the two roof configurations were considered, and two strong motion records, from September 26, 1997, and October 30, 2016, were applied. The results show that the concrete roof improves the box-like behavior, but it increases the vulnerability of the masonry structures, characterized by a limited tensile strength. Conversely, in the timber roof configuration, the most vulnerable areas of the structure are the intersections between structural elements.

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Micro-mechanical FE numerical model for masonry curved pillars reinforced with FRP strips subjected to single lap shear tests

Abstract: Micro-mechanical FE numerical model for masonry curved pillars reinforced with FRP strips subjected to single lap shear tests. Composite Structures. 201:916-931.

Cited by 44 publications

References 30 publications

Coupled interface-based modelling approach for the numerical analysis of curved masonry specimens strengthened by CFRP

Coupled interface-based modelling approach for the numerical analysis of curved masonry specimens strengthened by CFRP

Pushover Tests on Unreinforced Masonry Wallettes Retrofitted with an Innovative Coating: Experimental Study and Finite Element Modelling

Seismic response of a masonry church in Central Italy: the role of interventions on the roof

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