Integrated approach for seismic vulnerability analysis of historic massive defensive structures

Dall’Asta, Andrea; Leoni, Graziano; Meschini, Alessandra; Petrucci, Enrica; Zona, Alessandro

doi:10.1016/j.culher.2018.07.004

Cited by 35 publications

(16 citation statements)

References 62 publications

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“…Additionally, historical masonry structures often present complex geometries and thus, geometrical simplifications adopted at modelling stage may lead to either invalid or inaccurate evaluations. Nowadays, modern survey techniques such as Digital Photogrammetry (DP) and 3D Laser Scanning (LS) allow to quickly and accurately obtain all geometrical information needed [4][5][6][7][8]. More challenging is converting large sets of information into a reliable and computationally efficient structural model.…”

Section: Introductionmentioning

confidence: 99%

Visual programming for structural assessment of out-of-plane mechanisms in historic masonry structures

Funari

Spadea

Lonetti

et al. 2020

Journal of Building Engineering

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This work aims at proposing a novel procedure for the seismic assessment of historic masonry structures which is computationally efficient and does not rely on destructive material tests. Digital datasets describing the geometric configuration of historic masonry structures are employed to automatically generate a non-linear Finite Element (FE) model and investigate on possible collapse modes. A configuration of failure surfaces is therefore detected through the Control Surface Method (CSM), which is here proposed for the first time. In a following step of the analysis, structural macroblocks are identified, whereas an upper bound limit analysis approach is employed to estimate the structural capacity of the structure. Genetic Algorithms are also employed to detect the actual failure mode for the structure. The procedure is implemented into a visual coding environment, which allows one to parametrically explore all possible failure surfaces and immediately visualize the effects of the user assumptions. This is particularly suited to support a decisions-making process which strongly relay on engineering judgement. The procedure is validated by the analysis of several benchmark cases, whose results are presented and discussed.

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Section: Introductionmentioning

confidence: 99%

Visual programming for structural assessment of out-of-plane mechanisms in historic masonry structures

Funari

Spadea

Lonetti

et al. 2020

Journal of Building Engineering

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“…As a result of the test, numerous micro-cracks occurred when the load was applied. Dall'Asta et al [34] have noted that these microcracks were tensile cracks during the uniaxial compression test. In addition, the STS test was also performed.…”

Section: Determination Of Static Elastic Modulus Using a Mechanical Testmentioning

confidence: 98%

Microstructural Characterization and Mechanical Properties of Volcanic Tuff (Malatya, Turkey) Used as Building Stone for the Restoring Cultural Heritage

Maraş

Köse

Rızaoğlu

2020

Period. Polytech. Civil Eng.

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Old stone buildings constitute a significant percentage of the residential buildings in many countries. These structures are highly vulnerable, and important losses in masonry structures occur even in moderate earthquakes. Therefore, safety evaluations of these structures have gained significant attention in recent years. In this study, the mechanical, physical and microstructural characteristics of tuff samples used in the old buildings were investigated in Battalgazi within the boundaries of Malatya Province during the Seljuk time. The characteristics of the building materials were examined in detail using in-situ and laboratory tests. Because adequate samples could not be obtained from the historical buildings, quarry areas with the same characteristics were identified. First, original building stone (OBS) used in construction was taken from fallen and unusable blocks. Then, the properties of the restoration building stones (RBS) brought from the quarries were investigated. The RBS samples were also examined using in the laboratory, and the mechanical and microstructural properties of the building components were determined. The dynamic and static moduli of elasticity were determined using ultrasonic pulse velocity and uniaxial compression test. The OBS and RBS samples yielded similar results after the microstructural analyses. Our results showed that the dynamic elastic modulus value was higher than the static elastic modulus value. The results revealed by both methods showed that the static and dynamic elastic moduli were closely linked. The OBS and RBS samples exhibited microlitic porphyritic and vesicular textures and nearly the same mineralogical and textural characteristics.

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“…Along the same line, the Italian Building Code [14,15] and the corresponding Instructions [16,17], provide, within the knowledge process, the possibility of carrying out experimental tests in order to directly identify the mechanical parameters of masonry. However, the execution of exhaustive in situ experimental tests can often be difficult both for economic and executive aspects, especially in the case of historic and monumental buildings [18][19][20][21][22][23][24]. For this reason, in the event that no experimental tests are performed, the mechanical characteristics can be deduced from Table C.8.5.I (Table 1, [17]), which provides the minimum and maximum values of resistance and deformability for masonry types typical of the Italian territory, with reference to specific conditions: mortar with modest characteristics, absence of stringcourses, absence of transversal connection, nonconsolidated masonry, and so forth.…”

Section: Introductionmentioning

confidence: 99%

The Tuscany Masonry Database Website

Boschi¹,

Bernardini²,

Vignoli³

2021

Heritage

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The Tuscany Masonry Database (TMDB) is an online database containing the results and the complete experimental data of in situ experimental tests carried out on masonry panels of masonry buildings located in the Tuscany Region (Italy), starting from 1990. The results can be freely downloaded by users after registration on the site. To date, the TMDB includes 142 georeferenced tests, comprising 50 diagonal tests, 5 compression tests, and 87 flat-jack tests. In addition, there are tests on the components, such as compression tests on blocks, penetrometric testing on mortar, macroscopic or microscopic analysis of mortar, and coring. The results are supported by a qualitative description of the masonry texture and are compared with the reference values of the mechanical characteristics proposed by the Italian Building Code. The data come from scientific literature and are the result of collaborations between the Seismic Sector of the Tuscany Region and some Tuscan University Laboratories, or they are shared by private test laboratories mainly acting in Tuscany. The TMDB was developed and is constantly updated by the authors to provide support to researchers and freelance engineers in the knowledge process phase of masonry buildings, as well as for that of particular structures, such as heritage buildings. Furthermore, it allows for the filling of the lack of particularity of masonry classification and for the consideration of particular masonry types existing in local areas, for which there are no literature data or specific experimentation. Further tests are currently being processed to be included in the database, and divulgation activity on the project is foreseen. Furthermore, national and international collaborations are underway for the expansion of the database, with the aim of unifying test procedures and updating the codes.

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Integrated approach for seismic vulnerability analysis of historic massive defensive structures

Cited by 35 publications

References 62 publications

Visual programming for structural assessment of out-of-plane mechanisms in historic masonry structures

Visual programming for structural assessment of out-of-plane mechanisms in historic masonry structures

Microstructural Characterization and Mechanical Properties of Volcanic Tuff (Malatya, Turkey) Used as Building Stone for the Restoring Cultural Heritage

The Tuscany Masonry Database Website

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