A Comparative Computational Investigation on the In-Plane Behavior and Capacity of Dry-Joint URM Walls

Wilson, R. B.; Szabó, Simon; Funari, ‪Marco Francesco; Pulatsu, Bora; Lourenço, Paulo B.

doi:10.1080/15583058.2023.2209776

Cited by 5 publications

(3 citation statements)

References 42 publications

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“…No rotation was allowed at the top beam during the lateral loading. This test was already used as validation in an earlier study [20]. Therefore, only a summary of this validation case will be presented here.…”

Section: Validation Studies and Discontinuum-based Analysismentioning

confidence: 99%

“…It is important to highlight that the consideration of potential crack surfaces in masonry units, implementation of sophisticated material models, and contact constitutive laws in DEM-based models (both in two-and three-dimensional settings) are driven by expectations from computational predictions. The available studies adopting DEM as a predictive numerical model (e.g., [17][18][19][20]) consist of different improvements and simplifications related to the necessities stemming from physical realities. A review article focusing on the differences between available DEM-based computational models and their application to masonry structures is discussed in [21].…”

Section: Introductionmentioning

confidence: 99%

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Computational Modelling of Damage Progression in Unreinforced Masonry Walls via DEM

Pulatsu,

Tuncay

2024

Turkish Journal of Civil Engineering

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Unreinforced masonry (URM) walls are the common load-bearing elements for old masonry buildings and heritage structures. As witnessed from the past and recent earthquakes, URM walls may demonstrate various collapse mechanisms along with different crack patterns influenced by the wall aspect ratio, vertical pre-compression load, opening size and ratio, among many other factors. Typically, the mortar joints and unit-mortar interfaces are the weak planes where we expect to observe most failures, such as sliding, cracking and joint opening. However, it is not a straightforward task to simulate the structural behaviour and the failure mechanism of URM walls, including the crack localizations and propagation through the mortar joints, using the standard continuum-based computational models given the composite and highly nonlinear nature of the material. In this context, the present research offers a discontinuum-based approach to simulate the damage progression in URM walls subjected to combined shear-compression loading using the discrete element method (DEM). The masonry walls are represented via distinct elastic blocks interacting through point contacts to their surroundings. It is aimed to present the effect of the local fracture mechanism on the macro response of the masonry walls via validated DEM-based numerical models that can address all possible fracture mechanisms occurring at the unit-mortar interfaces. An innovative damage monitoring technique relying on the stress state at the point contacts is implemented and utilized to explore the associated damage progression in URM walls. The results show the great potential of the adopted modelling strategy to better understand the mechanics of URM walls and indicate the effect of strength properties of masonry constituents on the overall in-plane capacity of the load-bearing walls.

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Section: Validation Studies and Discontinuum-based Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Computational Modelling of Damage Progression in Unreinforced Masonry Walls via DEM

Pulatsu,

Tuncay

2024

Turkish Journal of Civil Engineering

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“…In addition, they have low ductility as well as scarce dissipation of seismic energy [8]. Also, out-of-plane failure, formation of local mechanisms and disaggregation are frequent occurrences in existing URM structures built before seismic regulations [9,10]. Today, after recent devastating earthquakes in 2020, M L = 5.5 in Zagreb and M L = 6.3 in Petrinja, there is, more than ever, a need for a more reliable assessment of existing masonry structures.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Existing Masonry Resistance Using Partial Factors Approaches and Field Measurements

Lulić,

Lukačević,

Skejić

et al. 2023

Buildings

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The vast majority of existing structures in Croatia, as well as in other European countries, are made of unreinforced masonry. The seemingly ideal building material presents a great challenge for engineers in earthquake-prone zones. Given that structural failure can have significant consequences in terms of loss of human lives as well as financial losses, a comprehensive structural reliability assessment is needed. Old existing masonry structures often do not have design documentation, and even when they do, the initial mechanical properties have almost certainly degraded over time. That is why in situ testing is of great importance, but masonry is also characterized by a large scattering of results. After recent severe earthquakes in Croatia, more than ever, there is a need for a more reliable assessment of existing masonry structures. This paper presents reliability approaches for resistance evaluation of existing masonry in a real case study where basic failure modes of the masonry were observed. First, the data recommended in standards were used, followed by the updated data obtained from the flat-jack test. Finally, the design value method (DVM) and the adjusted partial factor method (APFM) were used. These methods align with Eurocode standards for new structures but are also adaptable for the assessment of existing structures. Differences in the results between the existing and the new version of the standard were observed, as well as an increase in the obtained resistances with an increase in the complexity of the methods used. Also, the influence of in situ testing proved to be an important factor in the analysis.

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A mason-inspired pattern generator for historic masonry structures using quality indexes

Szabó,

Funari,

Lourenço

2024

Engineering Structures

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A Comparative Computational Investigation on the In-Plane Behavior and Capacity of Dry-Joint URM Walls

Cited by 5 publications

References 42 publications

Computational Modelling of Damage Progression in Unreinforced Masonry Walls via DEM

Computational Modelling of Damage Progression in Unreinforced Masonry Walls via DEM

Assessment of Existing Masonry Resistance Using Partial Factors Approaches and Field Measurements

A mason-inspired pattern generator for historic masonry structures using quality indexes

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