Formulation and experimental validation of distributed plasticity macro-element for unreinforced masonry walls

Parisi, Fulvio; Acconcia, Elia

doi:10.1201/9781003098508-18

Cited by 4 publications

(6 citation statements)

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“…Figures 2a and 2b show the constitutive model assigned to the whole masonry in compression and tension, respectively, for FE macro-modelling in ABAQUS. The constitutive model assumed in the FE macro-modelling was also considered in an equivalent frame modelling (EFM) approach by developing and analysing a fibre structural model using proprietary software developed in MATLAB ® [8,9].…”

Section: Methodsmentioning

confidence: 99%

“…The wall was also analyzed using an Equivalent Frame Modeling (EFM) approach, employing the same mechanical parameters as those used in Finite Element Modeling (FEM). The EFM analyses were carried out using a proprietary MATLAB code, which allows for nonlinear static analysis of masonry structures using a fiber macro-element that was recently developed and experimentally validated by Parisi and Acconcia [7,8]. The macro-element takes into account flexural, shear, and rocking behavioural modes, considering both geometric and mechanical nonlinearities as well as the macroscopic constitutive behavior of masonry.…”

Section: Nonlinear Finite Element Analysismentioning

confidence: 99%

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Numerical Investigation on the Flange Effect in Unreinforced Masonry Wall Systems Through Nonlinear Finite Element Modelling

Acconcia,

Buonocunto,

Parisi

2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Equivalent frame modelling of unreinforced masonry buildings allows for nonlinear analysis with relatively low computational cost. The wall components, particularly piers and spandrels, are usually modelled as prismatic beam elements with rectangular cross section. Nonetheless, in case of effective connection between orthogonal walls, the so-called flange effect should be taken in due consideration, resulting into I-, T-and C-shaped cross sections of piers. Specifically, orthogonal walls partly contribute to the in-plane resistance of longitudinal walls, eventually producing some changes in nonlinear behaviour of masonry walls, failure modes, and seismic capacity features. This problem thus requires more advanced computational strategies to assess the flange effect. In this paper, a numerical investigation aimed at assessing the flange effect is presented. A nonlinear finite element (FE) model was calibrated to reproduce the results of experimental tests on a flanged wall system. The FE model was then used to perform a parametric analysis, highlighting variations in the in-plane resistance of longitudinal walls as a result of collaboration with orthogonal walls.

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Section: Methodsmentioning

confidence: 99%

Section: Nonlinear Finite Element Analysismentioning

confidence: 99%

Numerical Investigation on the Flange Effect in Unreinforced Masonry Wall Systems Through Nonlinear Finite Element Modelling

Acconcia,

Buonocunto,

Parisi

2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…This study builds upon a fibre-based macroelement that was recently developed and experimentally validated by Parisi and Acconcia [11,12]. The aim was to develop a matrix-based procedure for nonlinear incremental static (pushover) analysis of masonry walls and buildings.…”

Section: Macroelement Analysis Proceduresmentioning

confidence: 99%

“…The pushover analysis procedure is based on a nonlinear incremental algorithm with response control, namely, where the structure is subjected to increasing horizontal displacement of a control point located at the roof level. The macroelement proposed by Parisi and Acconcia [12] is modified to incorporate the presence of possible rigid end parts, simulating the presence of pier-spandrel joint panels. Each macroelement is formulated according to Timoshenko's beam theory and its stiffness matrix is defined by accounting for axial, flexural, shear, and torsional behaviour.…”

Section: Macroelement Analysis Proceduresmentioning

confidence: 99%

Nonlinear Static Analysis of Masonry Buildings Through Fibre-Based Capacity Modelling

Acconcia¹,

Buonocunto²,

Parisi³

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Seismic performance assessment of masonry buildings requires a nonlinear response analysis to achieve a reliable understanding of the possible effects of future earthquakes in terms of damage and losses. Equivalent frame (EF) modelling combined with nonlinear static procedures has been recognized as an efficient tool, which was validated in several studies through both experimental data and post-earthquake damage inspections. In this paper, a new macroelement based on a fibre formulation is implemented into a matrix analysis approach to build up a nonlinear EF model and to perform incremental static (pushover) analysis with response control. For each step of the analysis, the stiffness matrix of the structure is updated using the novel macroelement model, accounting for geometric and mechanical nonlinearities both in terms of flexural and shear behaviour. Floor systems are modelled with truss elements, the stiffness of which can be varied in order to consider either rigid or flexible floors. In addition, the capacity model can simulate different degrees of connection at wall intersections and can easily be adapted to consider structural elements made of reinforced concrete, steel, wood, or other materials. The capacity modelling procedure proposed in this study was first validated by simulating the in-plane lateral behaviour of a full-scale masonry wall with opening, and then, implemented to run pushover analysis of existing masonry buildings representative of those located in the Campania region (southern Italy).

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“…This archetype was subsequently modelled with the aid of MATLAB programming software using the equivalent frame modelling criterion (EFM) [8] with vertical and horizontal elements simulating pier and spandrel panels, respectively [2,9], which in addition to being suggested by various normative codes, is the most widespread method for the analysis of masonry structures to date.…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Vulnerability Analysis of Historical Masonry Buildings

Buonocunto,

Serino,

Parisi

2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Masonry structures represent a large amount of the built heritage all around the world. Many of those buildings have significant historical and cultural value but they are characterized by high levels of vulnerability to multiple hazards. Although the vulnerability of masonry buildings to earthquakes has been largely investigated in previous studies, there are still major knowledge gaps on vulnerability to other hazards such as soil settlements and environmental degradation. In this study, a new methodology for multi-hazard vulnerability assessment of historic masonry buildings is proposed. Aiming at supporting nation-wide disaster risk prioritization, a large-scale probabilistic approach is delineated. The Italian built heritage was considered for the implementation of the methodology. A huge data set on historical masonry buildings was collected and processed to define realistic building archetypes, with special focus on residential buildings built before 1920. Statistical data on some properties of the building archetypes are compared to empirical relationships available in past treatises and rules of thumb. A multi-scale structural modeling procedure was used, looking to both global behaviour via equivalent frame modeling of the structure and local behaviour of individual elements and sub-systems. Furthermore, the most influential structural parameters were identified through a sensitivity analysis. Analysis results show the different impact of such parameters depending on the type of hazard under consideration.

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Formulation and experimental validation of distributed plasticity macro-element for unreinforced masonry walls

Cited by 4 publications

References 0 publications

Numerical Investigation on the Flange Effect in Unreinforced Masonry Wall Systems Through Nonlinear Finite Element Modelling

Numerical Investigation on the Flange Effect in Unreinforced Masonry Wall Systems Through Nonlinear Finite Element Modelling

Nonlinear Static Analysis of Masonry Buildings Through Fibre-Based Capacity Modelling

Large-Scale Vulnerability Analysis of Historical Masonry Buildings

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