Mechanical behaviour of Dionysos marble smooth joints under cyclic loading: II. Constitutive modeling

Papadopoulos, C.; Basanou, M.E.; Vardoulakis, I.P.; Boulon, M.; Armand, Gilles

doi:10.1201/9780203747810-23

Cited by 2 publications

(3 citation statements)

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“…Several experimental observations (e.g. [39,42,30,43]) justify its use up to moderate compression. More specifically, the maximum joint shear (or tangential) force t t is limited by the Coulomb failure surface:…”

Section: Constitutive Behavior Of Masonry Jointsmentioning

confidence: 99%

“…Masonry joints, show generally a non-dilatant behavior. For instance, monotonic and cyclic shear tests of masonry interfaces [39,30] show zero dilatancy, even though the friction angle remains high, and in some cases constant, during sliding. This contrast between the values of the friction and dilatancy angles is typical in geomaterials (see for example various kinds of sands, soils and rocks) and violates the classical and handy assumption of associativity in the theory of plasticity.…”

Section: Introductionmentioning

confidence: 99%

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Effects of the dilatancy of joints and of the size of the building blocks on the mechanical behavior of masonry structures

2017

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International audienceThe effect of the dilatancy of masonry interfaces and of the size of the building blocks on the strength of masonry structures is quantified herein. The study focuses mainly on out-of-plane loadings, which can appear due to various factors such as wind, earthquakes or explosions. The analysis is performed using the Discrete Element Method (DEM), which allows to access directly various micro-mechanical parameters, such as the joints dilatancy angle and the size of the building blocks. Detailed DEM numerical models of existing experimental configurations are presented. The numerical results are first compared and validated towards the experimental observations and then they are used to derive qualitative and quantitative conclusions regarding the effects of joints dilatancy and blocks size. It is shown that dilatancy plays an important role on the overall strength of masonry even under low confinement. The size of the blocks is also an important parameter that needs to be considered in the modeling of masonry structures

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Section: Constitutive Behavior Of Masonry Jointsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of the dilatancy of joints and of the size of the building blocks on the mechanical behavior of masonry structures

2017

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“…For relatively slender blocks, i.e. α ≤ 20 • , which are of interest here, and for an angle of friction φ ≈ 30 • (typical value for marble to marble interfaces see for instance [21]), rocking is critical.…”

Section: Rocking Motionmentioning

confidence: 99%

Rocking response of inverted pendulum structures under blast loading

Masi

Stefanou

Vannucci³

et al. 2019

International Journal of Mechanical Sciences

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We investigate the dynamics of inverted pendulum structures under fast-dynamic excitations arising from an explosion. We model blast actions using established empirical models and best-fit interpolations of existing experimental tests. We focus attention on pure rocking response mechanisms. We present moment balance equations and overturning conditions. Inspired by previous works in the frame of earthquake engineering, we derive new analytical, closed-form solutions for the rocking response and the overturning domain of slender blocks due to explosions. The analytical findings and assumptions are validated through existing experimental tests and detailed three-dimensional numerical simulations, which consider the full interaction between the blast waves and the structure. We show that unilateral rocking response and overturning are predominant mechanisms compared to sliding and uplifting. Finally, we develop design charts to be used as a straightforward decision making tool for determining the critical stand-off distance between the explosive source and the target in order to prevent overturning. Our model can be easily applied for the design of protective devices to preserve artefacts, secure buildings and humans, as well as for devising energy absorbing systems based on rocking.

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Mechanical behaviour of Dionysos marble smooth joints under cyclic loading: II. Constitutive modeling

Cited by 2 publications

References 0 publications

Effects of the dilatancy of joints and of the size of the building blocks on the mechanical behavior of masonry structures

Effects of the dilatancy of joints and of the size of the building blocks on the mechanical behavior of masonry structures

Rocking response of inverted pendulum structures under blast loading

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