Evaluation of Partial Safety Factors for the Structural Assessment of Existings Masonry Buildings

Croce, Pietro; Beconcini, Maria Luisa; Formichi, Paolo; Landi, Filippo; Puccini, Benedetta; Zotti, Vincenzo

doi:10.1007/978-3-030-73616-3_25

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…As said, considering the already-mentioned guidelines for the application of the Italian Building Code [19], as well as the so-called masonry quality index (MQI) [18] derived by visual inspection, the collected results allowed for identifying the most relevant masonry classes and the statistical parameters characterizing their main mechanical properties: compressive strength, f m ; elastic modulus, E; and shear modulus, G, [2], which are necessary to calibrate the partial safety factors for resistance [21].…”

Section: Database Of Materials Test Resultsmentioning

confidence: 99%

Experimental Evaluation of Shear Behavior of Stone Masonry Wall

et al. 2021

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The evaluation of the shear behavior of masonry walls is a first fundamental step for the assessment of existing masonry structures in seismic zones. However, due to the complexity of modelling experimental behavior and the wide variety of masonry types characterizing historical structures, the definition of masonry’s mechanical behavior is still a critical issue. Since the possibility to perform in situ tests is very limited and often conflicting with the needs of preservation, the characterization of shear masonry behavior is generally based on reference values of mechanical properties provided in modern structural codes for recurrent masonry categories. In the paper, a combined test procedure for the experimental characterization of masonry mechanical parameters and the assessment of the shear behavior of masonry walls is presented together with the experimental results obtained on three stone masonry walls. The procedure consists of a combination of three different in situ tests to be performed on the investigated wall. First, a single flat jack test is executed to derive the normal compressive stress acting on the wall. Then a double flat jack test is carried out to estimate the elastic modulus. Finally, the proposed shear test is performed to derive the capacity curve and to estimate the shear modulus and the shear strength. The first results obtained in the experimental campaign carried out by the authors confirm the capability of the proposed methodology to assess the masonry mechanical parameters, reducing the uncertainty affecting the definition of capacity curves of walls and consequently the evaluation of seismic vulnerability of the investigated buildings.

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Section: Database Of Materials Test Resultsmentioning

confidence: 99%

Experimental Evaluation of Shear Behavior of Stone Masonry Wall

et al. 2021

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Sensitivity analysis on mechanical parameters of continuum models for simulating in-plane tests on existing masonry panels

Bartolini,

De Falco,

Landi

et al. 2024

Engineering Structures

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New Frontiers of Composites Applications in Heritage Buildings: Repair of Exposed Masonry of St. Nicola Church in Pisa

Croce

2021

J. Compos. Sci.

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The upgrading and repair of masonry structures, which constitute a great part of built heritage, involve intricate aspects, in fact, the choice of the most suitable intervention technique is strongly dependent on its compatibility with superior preservation requirements. At present, beside more traditional approaches, many composite-based techniques are available, but, there are cases, such as exposed masonry, which are much more complicated to treat, since, to safeguard the original aspect, any intervention on the surface is precluded. In this paper, an innovative repair technique is discussed. The proposed method, highly adaptable and suitable for general application, is based on the insertion of a composite fabric into the mortar joints of the exposed masonry, partly relying on the indent repair technique traditionally used for the repair of masonry structures. Due to the peculiarities of the approach, the feasibility and efficiency of the solution cannot be demonstrated through application in the testing laboratory or on reduced samples, it was, therefore, necessary to identify a relevant case study for a field testing. After careful evaluation, duly considering the risks from the esthetic point of view, the proposed solution was implemented to repair the exposed masonry of the main façade and of the rear façade of the medieval San Nicola Church in Pisa, which is an outstanding example of the Pisan-Romanesque style. Thanks to a careful definition of the operational phases and to skilled workmanship, the solution was easily implemented in the year 2005, fully safeguarding the aesthetics of the façades, so demonstrating its feasibility. However, this successful outcome was only a first proof of the validity of the experiment, which also needed, for complete validation, the assessment of its efficiency over time. Only recently, after more than 15 years, it has been possible to ascertain that the intervention is still effective, because the crack patterns are stabilized and no reopening of the crack has occurred in the meantime, so achieving full confirmation.

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Evaluation of Partial Safety Factors for the Structural Assessment of Existings Masonry Buildings

Cited by 3 publications

References 11 publications

Experimental Evaluation of Shear Behavior of Stone Masonry Wall

Experimental Evaluation of Shear Behavior of Stone Masonry Wall

Sensitivity analysis on mechanical parameters of continuum models for simulating in-plane tests on existing masonry panels

New Frontiers of Composites Applications in Heritage Buildings: Repair of Exposed Masonry of St. Nicola Church in Pisa

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