Shear modulus of masonry walls: a critical review

Croce, Pietro; Beconcini, Maria Luisa; Formichi, Paolo; Cioni, Paolo; Landi, Filippo; Mochi, Caterina; Lellis, Francesco De; Mariotti, Elisabetta; Serra, I

doi:10.1016/j.prostr.2018.11.044

Cited by 29 publications

(37 citation statements)

References 7 publications

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“…The preliminary work on seismic assessment was based only on visual inspection of the buildings [19,36], NDT [15,24,32,37,38], and the experience of an engineer. The last decade has seen a growth in the technological advancement of various instruments that can considerably help in the estimation of structural safety and seismic behavior of existing structures.…”

Section: The Assessment Methods For Condition Inspection and Identifimentioning

confidence: 99%

A Review of Emerging Technologies for an Assessment of Safety and Seismic Vulnerability and Damage Detection of Existing Masonry Structures

Stepinac

Gašparović

2020

Applied Sciences

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The construction sector has proven to be one of the slowest sectors to embrace technology—a problem that must be addressed. This problem can be quickly and efficiently addressed in certain aspects of seismic engineering: from seismic risk assessment to damage detection, as well as condition assessments existing structures before or after an earthquake. In this paper, the literature review of assessment methods and damage detection technologies for existing (mainly) masonry structures is presented. Traditional methods are briefly explained, and modern are critically discussed. Special focus is given to unmanned aerial vehicles, as well as, photogrammetry and close-range remote sensing as a technology that can complement traditional ways of assessment and give us data about a structure that is often different to obtain. Graphical interpretation of one post-earthquake case study is provided. Open challenges and opportunities of emerging technologies for faster and easier assessment of seismic safety and vulnerability are presented.

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Section: The Assessment Methods For Condition Inspection and Identifimentioning

confidence: 99%

A Review of Emerging Technologies for an Assessment of Safety and Seismic Vulnerability and Damage Detection of Existing Masonry Structures

Stepinac

Gašparović

2020

Applied Sciences

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“…In order to strengthen existing weak structures, assessment must be necessarily designed and carried out. In the past, most of the initial work on seismic assessment was based only on the visual inspection of buildings [27], NDT methods (see, for example, [32,41,[44][45][46]), as well as the experience of engineers. The last decade, however, has seen a growth in the technological development of various tools which can greatly support the prediction of structural safety and seismic behaviour of existing structures, i.e., thermography [36], photogrammetry [47], unmanned aerial vehicles [48], etc.…”

Section: Seismic Actions and Masonry Structuresmentioning

confidence: 99%

Methods for the Assessment of Critical Properties in Existing Masonry Structures under Seismic Loads—The ARES Project

et al. 2020

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Masonry structures are notoriously vulnerable to horizontal actions caused by earthquakes. Given the high seismicity of the European region, and that the European building stock comprises a lot of masonry buildings, knowledge about their structural response to seismic excitation is particularly important, but at the same time difficult to determine, due to the heterogenous nature of materials and/or constructional techniques in use. An additional issue is represented by the current methods for mechanical properties assessment, that do not provide a reliable framework for accurate structural estimations of existing buildings characterized by different typological properties. Every structure, in other words, should be separately inspected in regard to its mechanical behaviour, based on dedicated approaches able to capture potential critical issues. In this review paper, an insight on the Croatian ARES project is presented (Assessment and Rehabilitation of Existing Structures), including a state-of-the-art of the actual building stock and giving evidence of major difficulties concerning the assessment of existing structures. The most commonly used techniques and tools are compared, with a focus on their basic features and field of application. A brief overview of prevailing structural behaviours and Finite Element numerical modelling issues are also mentioned. As shown, the general tendency is to ensure “sustainable” and energy-efficient building systems. The latter, however, seem in disagreement with basic principles of structural maintenance and renovation. The aim of the ongoing ARES project, in this context, is to improve the current knowledge regarding the assessment and strengthening of structures, with a focus on a more reliable design and maintenance process for existing masonry buildings.

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“…Moreover, depending on the material as well as on the texture, several masonry types can be detected in existing buildings, characterized by mechanical parameters varying in a very wide range. Anyhow, stiffness identification [24,25] and evaluation of drift capacity of in-plane loaded walls [26,27] are still critical issues [28].…”

Section: Challenges In the Assessment Of The Seismic Performancementioning

confidence: 99%

“…Flat jacks, diagonal compression and shear compression tests, in situ or in laboratory conditions, are the subject of a wide literature concerning the shear resistance of masonry walls. But their outcomes are often contradictory; in fact, the values of mechanical parameters depend on the test procedure and may vary significantly for the same class of masonry or even for the same wall [24,25]. In this respect, guidelines for application of the Italian Building Code [29] provide some guidance, about the classification of masonry in terms of quality and typology.…”

Section: Challenges In the Assessment Of The Seismic Performancementioning

confidence: 99%

“…Regarding the shear modulus, due to belittle consideration influence of anisotropy and cracking of masonry, it seems that values provided in almost all national codes [29] as well as in Eurocode 6 [35] overestimate the actual values as reported in [24,36]. Based on a critical analysis of a large database of experimental test results [25], empirical relationships can be found for shear modulus and elastic modulus:…”

Section: Identification Of Uncertain Parametersmentioning

confidence: 99%

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Probabilistic Seismic Assessment of Existing Masonry Buildings

2019

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The evaluation of seismic performance of existing masonry buildings is a critical issue in assessing the seismic vulnerability of the built environment. With this aim, non-linear static analysis is commonly used, but results are influenced significantly by the collapse criteria adopted, as well as by the assumptions about material properties and drift capacity of masonry walls. A methodology for the probabilistic assessment of the seismic risk index is proposed by means of an original non-linear pushover type algorithm developed by the authors. The main sources of uncertainties related to masonry parameters and their influence on seismic risk indices are identified by means of sensitivity analysis. Response surfaces for the seismic risk indices are thus defined through general polynomial chaos expansion in order to quantify the uncertainties in the resulting seismic risk index. Finally, a seismic performance classification is presented to help stakeholders to manage risks and define priorities for seismic retrofit. The methodology together with the outcomes is illustrated for a set of existing masonry buildings that are part of the school system in the Municipality of Florence.

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Shear modulus of masonry walls: a critical review

Cited by 29 publications

References 7 publications

A Review of Emerging Technologies for an Assessment of Safety and Seismic Vulnerability and Damage Detection of Existing Masonry Structures

A Review of Emerging Technologies for an Assessment of Safety and Seismic Vulnerability and Damage Detection of Existing Masonry Structures

Methods for the Assessment of Critical Properties in Existing Masonry Structures under Seismic Loads—The ARES Project

Probabilistic Seismic Assessment of Existing Masonry Buildings

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