Modeling Approaches for Masonry Structures

Addessi, Daniela; Marfia, Sonia; Sacco, Elio; Toti, Jessica

doi:10.2174/1874149501408010288

Cited by 61 publications

(21 citation statements)

References 41 publications

(56 reference statements)

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“…For this reason, further efforts and research activities could be focalized on the development of a more accurate modelling, i.e. able to take into account both the nonlinear masonry behavior [51,52] and the strongly nonlinear phenomena (detachments, friction effects) occurring at the reinforcemasonry support interface [45 -47]. From technical point of view, an improvement could be get by introducing transversal glass fiber connectors between the masonry vault and the strengthening layer.…”

Section: Resultsmentioning

confidence: 99%

Ecosmart Reinforcement for a Masonry Polycentric Pavilion Vault

Gattulli¹,

Potenza²,

Toti³

et al. 2016

TOBCTJ

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Abstract:In the cultural life of modern societies great importance has acquired the preservation of existing and, in particular, ancient architectural heritage. With the inherent historical aspects, the economic implications have to be taken into account as well. Indeed, especially European cities and countries receive significant economic advantages by the existence of monuments and ancient suburbs. In this context, structural maintenance, strengthening and monitoring has gained an important academic and professional impulse. The present paper aims to present the results of a real scale experimental work regarding the application of an innovative seismic retrofitting technique for masonry walls and vaults by Hydraulic Lime Mortar strengthened by Glass Fiber Reinforced Polymer textile grids (HLM-GFRP) embedding new sensing systems as fiber optical sensors. The real scale specimen is a masonry polycentric pavilion vault that was damaged during the L'Aquila earthquake of April 2009. The need of eco compatibility of bonding material with masonry support implies the use of HLM-GFRP as strengthening system. On the other hand, the use of Fiber Bragg Grating (FBG) has a large number of advantages in opposite to electrical measuring methods. Example are: small sensor dimensions, low weight as well as high static and dynamic resolution of measured values, distributed sensing feature allowing to detect anomalies in load transfer between reinforcement and substrate and the location of eventual cracking patterns. A suitable Finite Element (FE) model is developed both to assess the effectiveness of the HLM-GFRP strengthening layers in retrofitting of the masonry vault and to define the strain field essential to the design of the FBG sensors network.

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Section: Resultsmentioning

confidence: 99%

Ecosmart Reinforcement for a Masonry Polycentric Pavilion Vault

Gattulli¹,

Potenza²,

Toti³

et al. 2016

TOBCTJ

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show abstract

“…39 A macromodeling approach, where masonry is represented as a single continuum element, is usually employed to model full-scale structures, with an obvious reduction in accuracy. 27,40 In order to interpret changes in volumetric strain obtained from smart bricks during the shaking table tests, the same tests were numerically simulated, with an implicit analysis in Abaqus platform, 41 by using a macromechanical FE model characterized by 106 938 nodes and 76 846 linear brick elements, type C3D8R, with reduced integration (1 integration point) and a mesh size of 50 mm. The nonlinear mechanical behavior of the masonry was defined by applying the concrete damage plasticity model proposed by Lubliner et al, 42 originally to describe the behavior of concrete materials, 43 but later adapted to masonry.…”

Section: Numerical Modelmentioning

confidence: 99%

Shaking table tests on a masonry building monitored using smart bricks: Damage detection and localization

Meoni

D’Alessandro

Cavalagli

et al. 2019

Earthq Engng Struct Dyn

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Summary The seismic behavior of unreinforced masonry buildings is typically characterized by premature brittle collapse mechanisms that can cause serious consequences for the protection of human lives and for the preservation of historical and cultural heritage. Structural health monitoring can be a powerful tool enabling a quick post‐earthquake assessment of the structure's performance, but its applications are still scarce as a consequence of the severe limitations affecting off‐the‐shelf sensing technologies, in terms of local nature of the measurements, costs, as well as long‐term behavior, installation, and maintenance. To overcome some of these limitations, the authors have recently proposed a new sensing technology, called “smart brick,” that is a durable clay brick doped with stainless steel microfibers, working as a smart strain sensor for masonry buildings. This paper presents the first full‐scale application of smart bricks, used for detecting and localizing progressive earthquake‐induced damage in an unreinforced masonry building subjected to shaking table tests. Smart bricks are employed to detect changes in load paths on masonry walls, comparing strain measurements acquired after each step of the seismic sequence with those referring to the undamaged structure. Experimental results are interpreted using a 3D finite element model built to reproduce the shaking table tests. Overall, the results demonstrate that the smart bricks can effectively reveal local permanent changes in structural conditions following a progressive damage, therefore being apt for earthquake‐induced damage detection and localization.

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“…The propagation of these cracks within the structure determines the development of the collapse mechanism and consequently the capacity of the structure under the given loading conditions. This structural behaviour has been taken into account for the development of both classical and advanced analysis tools for the structural assessment of masonry constructions [1,2,3,4].…”

Section: Introductionmentioning

confidence: 99%

Tracking multi-directional intersecting cracks in numerical modelling of masonry shear walls under cyclic loading

2017

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In-plane cyclic loading of masonry walls induces a complex failure pattern composed of multiple diagonal shear cracks, as well as flexural cracks. The realistic modelling of such induced localized cracking necessitates the use of costly direct numerical simulations with detailed information on both the properties and geometry of masonry components. On the contrary, computationally efficient macro-models using standard smeared-crack approaches often result in a poor representation of fracture in the simulated material, not properly localized and biased by the finite element mesh orientation. This work proposes a possible remedy to these drawbacks of macro-models through the use of a crack-tracking algorithm. The macro-modelling approach results in an affordable computational cost, while the tracking algorithm aids the mesh-bias independent and localized representation of cracking. A novel methodology is presented that allows the simulation of intersecting and multi-directional cracks using tracking algorithms. This development extends the use of localized crack approaches using tracking algorithms to a wider field of applications exhibiting multiple, arbitrary and interacting cracking. The paper presents also a novel formulation including into an orthotropic damage model the description of irreversible deformations under shear loading. The proposed approach is calibrated through the comparison with an experimental test on a masonry shear wall against in-plane cyclic loading.

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Modeling Approaches for Masonry Structures

Cited by 61 publications

References 41 publications

Ecosmart Reinforcement for a Masonry Polycentric Pavilion Vault

Ecosmart Reinforcement for a Masonry Polycentric Pavilion Vault

Shaking table tests on a masonry building monitored using smart bricks: Damage detection and localization

Tracking multi-directional intersecting cracks in numerical modelling of masonry shear walls under cyclic loading

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