Multi-Scale Analysis of In-plane Behaviour of Tuff Masonry

D’Ambra, Claudio; Lignola, Gian Piero; Prota, Andrea

doi:10.2174/1874836801610010312

Cited by 8 publications

(11 citation statements)

References 17 publications

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“…In light of the above and despite the plethora of mathematical models that have been proposed for the modeling of masonry structures, for real masonry structures, it is preferable to use simplified macro-models such as modeling the masonry as a one-phase material (macro-modeling approach) while the use of more sophisticated micro-models is suggested for the modeling of special parts of the masonry structural model. Detailed works on the advantages and disadvantages among different mathematical models about masonry structures can be found in [40,100,101,155,156].…”

Section: Modeling Masonry Using Equivalent Frame Methodsmentioning

confidence: 99%

Stochastic Vulnerability Assessment of Masonry Structures: Concepts, Modeling and Restoration Aspects

et al. 2019

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A methodology aiming to predict the vulnerability of masonry structures under seismic action is presented herein. Masonry structures, among which many are cultural heritage assets, present high vulnerability under earthquake. Reliable simulations of their response to seismic stresses are exceedingly difficult because of the complexity of the structural system and the anisotropic and brittle behavior of the masonry materials. Furthermore, the majority of the parameters involved in the problem such as the masonry material mechanical characteristics and earthquake loading characteristics have a stochastic-probabilistic nature. Within this framework, a detailed analytical methodological approach for assessing the seismic vulnerability of masonry historical and monumental structures is presented, taking into account the probabilistic nature of the input parameters by means of analytically determining fragility curves. The emerged methodology is presented in detail through application on theoretical and built cultural heritage real masonry structures. leading to a final approval (or rejection) of the decisions already taken for repair or strengthening of the existing structure. Step 8: Explanatory ReportThe last step, as a result of the proposed methodology, includes the detailed "Explanatory Report", where all the collected information, the diagnosis, including the safety evaluation, and any decision to intervene should be fully detailed. This document is essential for eventual future analyses and interventions' measures in the structure. Computational and Mathematical AspectsIn this section, the most basic analytical constitutive laws and numerical models required for the successful implementation of the proposed methodology are presented in detail. In particular, the finite element model for the macro-modeling of masonry structures, the failure criteria, the damage indices, the performance levels and the mathematical background of fragility curves are presented.

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Section: Modeling Masonry Using Equivalent Frame Methodsmentioning

confidence: 99%

Stochastic Vulnerability Assessment of Masonry Structures: Concepts, Modeling and Restoration Aspects

et al. 2019

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“…Where fm and m are the compressive stress and strain in masonry respectively, and 'm is the peak strain corresponding to f'm A, B, and C are coefficients describing the shape of the curve, being A= 6.4, B=5.4 and C=1.17 [17]. The Coulomb friction model of the material is considered as follows:…”

Section: Numerical Simulation Of Experiments On Masonry Wallsmentioning

confidence: 99%

“…Where c is the cohesion, 𝜎 is the normal stress and tan 𝜑 is the friction between the elements. A friction angle 𝜑 equal to 23º was used to define the shear model as recommended in [17,18]. The FE model is discretized considering a mesh formed by 258 rectangular shell elements of 0.18 × 0.28 m 2 and 310 nodes.…”

Section: Numerical Simulation Of Experiments On Masonry Wallsmentioning

confidence: 99%

“…The compressive stress-strain relationship was modified considering a perfectly plastic behaviour (dashed line in Fig. 5a) as suggested in [17], in order to allow the model to reproduce correctly the base rotation of the piers in the experiment. A vertical pre-compression of 200 kN was applied at each pier of the wall, followed by a lateral displacement of 0.03 m applied at a height of 3.00 m on the left side of the wall simulating the experimental loading conditions.…”

Section: Numerical Simulation Of Experiments On Masonry Wallsmentioning

confidence: 99%

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Numerical Simulation of Traditional Timber-Masonry Buildings Subjected to Lateral Loads

Ramírez¹,

Pelà²

2021

12th International Conference on Structural Analysis of Historical Constructions

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Existing heritage buildings are often composed of diverse structural typologies, representing a challenge for structural analysis. This work investigates the use of nonlinear static analysis to assess the seismic behaviour of hybrid timber-masonry buildings. The proposed methodology includes the use of Lumped Plasticity Models (LPM) and Macro-Mechanical Finite Element (FE) approaches to simulate the response of structures composed of timber frames and masonry walls. Benchmark experiments on timber and masonry specimens subjected to lateral loads are used to calibrate the constitutive laws governing the behaviour of the proposed models. The calibrated models are used to appraise the seismic response of an existing timber-masonry building located in the historical centre of Valparaíso (Chile). The results predict the nonlinear acceleration-displacement capacity of the buildings, as well as the expected damage of the structure, revealing the potential local and global failure mechanisms.

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“…To make the modelling and capacity assessment of masonry structures even more challenging is the different role played by nonlinear mechanical properties such as strength [4] and fracture energy, as observed in [5][6][7]. Fracture energy plays a crucial role in the post-peak behaviour and displacement capacity of individual URM walls, while its impact is less crucial at larger scales of masonry walls with openings and at building scale [8].…”

Section: Introductionmentioning

confidence: 99%

Material aging effects on the in-plane lateral capacity of tuff stone masonry walls: a numerical investigation

2022

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Recent studies have shown how the variability of material properties affects the nonlinear behaviour of unreinforced masonry (URM) walls. To preserve the historical built heritage, variations in structural capacity of URM buildings associated to aging and deterioration of masonry should be quickly predicted, by integrating with structural health monitoring and risk management. In this study, relationships between structural capacity features and material properties are numerically investigated for single walls, based on a structural modelling strategy that was experimentally validated on full-scale URM walls. The paper proposes an evaluation of the effects of degradation of material properties on the macroscopic descriptors of single masonry walls, such as peak strength and stiffness, also considering the uncertainties in the estimate of those properties. The authors do not attempt to model the physical processes of material aging with time, but assume certain levels of material degradation and investigate their effects on the structural response and capacity. Force–displacement curves and failure modes are associated with the overall nonlinear response of masonry walls due to progressive deterioration of material properties. Regression models are then proposed to predict variations in the peak load-bearing capacity and in -plane lateral stiffness when the mechanical properties of the constituents changed.

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Multi-Scale Analysis of In-plane Behaviour of Tuff Masonry

Cited by 8 publications

References 17 publications

Stochastic Vulnerability Assessment of Masonry Structures: Concepts, Modeling and Restoration Aspects

Stochastic Vulnerability Assessment of Masonry Structures: Concepts, Modeling and Restoration Aspects

Numerical Simulation of Traditional Timber-Masonry Buildings Subjected to Lateral Loads

Material aging effects on the in-plane lateral capacity of tuff stone masonry walls: a numerical investigation

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