A new multi-control-point pushover methodology for the seismic assessment of historic masonry buildings

Olivito, Renato Sante; Porzio, Saverio

doi:10.1016/j.jobe.2019.100926

Cited by 22 publications

(7 citation statements)

References 33 publications

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“…On the basis of the capacity curve, the structural integrity is identified by using N2 method, which was proposed by Fajfar [34] for framed structures, and subsequently extended to historical masonry buildings [35][36][37]. As reported in [38,39], the evaluation of the collapse acceleration, which activates the mechanisms, strongly depends on the choice of the control point. Choosing a control point rather than another one, might produce erroneousness structural assessment especially for irregular structures, which cannot guarantee a box behaviour.…”

Section: Methods Of Analysismentioning

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: Methods Of Analysismentioning

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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“…The mesh size was established equal to 0.3 m. The tower was assumed to be clamped at the base and constituted by three groups of homogeneous and isotropic materials (three-group discretization) whose initial mechanical properties, chosen in accordance to the Italian Technical Standards for Structures [32], are reported in Table 2. The results of the preliminary modal analysis, implemented through the Lanczos method [17,21,33,34], are resumed in Table 3 and Figure 6. A remarkable difference is found among the frequencies of the EM and those of the NM, being the latter not yet calibrated on the basis of the experimental outcome.…”

Section: Preliminary Fe Model and Modal Analysis Resultsmentioning

confidence: 99%

Combining Operational Modal Analysis and Genetic Algorithms to Understand the Actual Structural Behavior of Historical Constructions

Standoli¹,

Salachoris²,

Masciotta³

et al. 2021

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

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Evolution of technologies both in the fields of in situ investigations and Finite Element (FE) modeling strongly enhanced the possibility to understand the structural dynamic behavior of masonry historical constructions, allowing a periodic or continuous analysis of their response to environmental, anthropic, and exceptional actions and the formulation of accurate hypotheses about their future behavior, which is fundamental for Cultural Heritage preservation. In order to improve the assessment of the health status of historical buildings, inverse methods re-sorting to dynamic identification techniques are often used to provide experimentally verified data for the accurate calibration of FE models representative of the investigated structures. In this paper, vibration-based identification methods are coupled with an automatic FE model updating procedure to study the dynamic behavior of the Civic Tower of Ostra, Italy, and obtain baseline information for future comparative analyses. The experimental data obtained from two different campaigns of ambient vibration tests are used to update the mechanical characteristics of the detailed FE model of the tower. The updating process, unsolvable via common calibration procedures, is automatically managed through a powerful bio-inspired tool, i.e. the Genetic Algorithm (GA), allowing to closely reproduce the actual behavior of the tower.

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“…In particular, for both the masonry column and the external reinforcement a macro model approach was used. The macro model approach, based on the same approach used in reinforced concrete structures, has been used in the analysis of masonry structures as reported in the technical literature; moreover, this strategy was adopted for un-strengthened column in order to properly replicate new masonry structures (Verre et al, 2019) or analyze the behavior of existing historical structures (Fortunato et al, 2017 andOlivito andPorzio, 2019). This technique does not allow to distinguish the single brick and the mortar joint (vertical or horizontal).…”

Section: Geometrical Modelingmentioning

confidence: 99%

Numerical Modeling Approaches of FRCMs/SRG Confined Masonry Columns

Ombres

Verre

2019

Front. Built Environ.

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The Fabric Reinforced Cementitious Matrices (FRCMs) and Steel Reinforced Grout (SRG) are a promising strengthening solution for existing masonry since inorganic matrix is considerably compatible with historical substrates. The present paper is focused on a Finite Element (FE) analysis of masonry columns confined with FRCM composites developed by Abaqus-code. The masonry columns were modeled using a macro model approach. The model was performed by using the following functions Concrete Damage Plasticity (CDP) and the Plastic (P) in order to describe the constitutive laws of material for masonry columns and external reinforcement, respectively. Typical failures of FRCM-systems are slippage of the fibers within the embedding matrix, instead for SRG-systems are detachment of the composite strip at the fabric-matrix interface and fiber rupture. In addition, perfect bond was considered for the interaction between the masonry column and in the overlap zone the bond slip law was modeled on the base of the failure mode. Results of an experimental investigation on FRCM and SRG clay brick masonry columns are used to calibrate the numerical model.

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A new multi-control-point pushover methodology for the seismic assessment of historic masonry buildings

Cited by 22 publications

References 33 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

Combining Operational Modal Analysis and Genetic Algorithms to Understand the Actual Structural Behavior of Historical Constructions

Numerical Modeling Approaches of FRCMs/SRG Confined Masonry Columns

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