Modal analysis of historical masonry structures: Linear perturbation and software benchmarking

Pellegrini, Daniele; Girardi, Maria; Lourenço, Paulo B.; Lourenço, Paulo B.; Mendes, Nuno; Padovani, Cristina; Ramos, Luís F.

doi:10.1016/j.conbuildmat.2018.09.034

Cited by 46 publications

(29 citation statements)

References 37 publications

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“…A further model updating is conducted by keeping the values of E, ν and ρ fixed (Tab.4) and varying the tensile strengths of brick (σ t = 0.5 MPa) and mortar (σt = 0.37 MPa). In order to numerically reproduce the experimental crack pattern along with its evolution [46], the tensile strength of the mortar joint circled in red in Fig. 10 is reduced of about 80%.…”

Section: Damage Scenarios Simulationmentioning

confidence: 99%

Dynamic characterization of progressively damaged segmental masonry arches with one settled support: experimental and numerical analyses

Masciotta

Pellegrini

Brigante

et al. 2019

Frattura Ed Integrità Strutturale

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This paper aims to explore the dynamic behavior of a segmental masonry arch subjected to increasing horizontal displacements of one support. To this end, output-only dynamic identification techniques are first used to track the evolution of the dynamic features of the system under progressive damage scenarios and evaluate their sensitivity to settlementinduced cracks. Considerations on the structural response of the segmental arch up to failure are also included. Then, a numerical procedure coupling linear perturbation and modal analysis is applied to simulate the dynamic behavior of the arch over consecutive scenarios, taking into account the influence of the damage on the structure's dynamic properties in an automatic way. The combination of experimental and numerical analyses allows to fully investigate the dynamics of the cracked masonry arch and to shed light on

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Section: Damage Scenarios Simulationmentioning

confidence: 99%

Dynamic characterization of progressively damaged segmental masonry arches with one settled support: experimental and numerical analyses

Masciotta

Pellegrini

Brigante

et al. 2019

Frattura Ed Integrità Strutturale

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“…In order to validate the performance of the optimization method described in section 2, two artificial examples are used. In both cases a preliminary numerical analysis consisting of static analysis, linear perturbation and modal analysis (from now on indicated as LPMA), is performed to evaluate the frequencies and mode shapes of the structure, taking into account the crack pattern due to the self-weight and external loads [11,12,14]. Subsequently, these frequencies are used as input of the proposed approach to recover the original parameters (Young's moduli and/or tensile strengths).…”

Section: Case Studiesmentioning

confidence: 99%

“…With regard to masonry structures, in [11,12,13] the dynamic behavior of masonry buildings is assessed using a numerical procedure based on linear perturbation and modal analysis, implemented in the FE code NOSA-ITACA, taking into account the influence of existing damage on the dynamic properties of buildings. In [14,15] the same approach is followed to estimate Young's moduli and tensile strengths of the materials constituting the Mogadouro bell tower, by applying a manual nonlinear model updating procedure.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Fe Model Updating for Masonry Constructions via Linear Perturbation and Modal Analysis

Girardi¹,

Padovani²,

Pellegrini³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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This paper describes the automated nonlinear model updating procedure for masonry structures implemented in the NOSA-ITACA code. The algorithm, aimed at matching numerical and experimental natural frequencies and mode shapes, combines nonlinear static analysis, linear perturbation and modal analysis and allows fine-tuning the free parameters of the model. The numerical method is applied to two simple case studies, which prove its effectiveness. 1229 COMPDYN 2019 7 th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.

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“…Among the buildings belonging to the heritage of Italian architecture, the masonry structures characterized by a predominantly vertical development, such as towers and belfries, are prevalent. In this context, the detailed analysis of interpretative models that can successfully define the effects of the earthquakes is an indispensable mean to know and predict the behavior of unplanned masonry buildings under seismic forces (Pellegrini et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior of an Inclined Existing Masonry Tower in Italy

Ferrante

Clementi

2019

Front. Built Environ.

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The renaissance bell tower of San Benedetto in Ferrara (Italy) has been investigated to understand its nonlinear dynamics correctly with the Non-Smooth Contact Dynamic (NSCD) method. The masonry structure has been modeled with the Discrete Element Methods (DEM), assuming rigid blocks and frictional joints, with the aim to recreate the tower in the actual configuration with the inclination and in a fictitious perfect vertical shape in order to assess the influence of the initial slope on its dynamics. The contacts between blocks are governed by the Signorini's impenetrability condition and by dry-friction Coulomb's law. Both configurations have been analyzed inducing real seismic excitations of various types and intensities, corresponding to the six main seismic events of the last few decades in Italy. Thus, the seismic vulnerability of the examined tower is clearly expressed in the numerical results, proving the effects due to the inclination on the amplification of the vulnerability and the several possible collapse mechanisms. Moreover, the NSCD has demonstrated to be a powerful numerical technique to obtain highly accurate results in the structural analyses of masonry structures in the nonlinear range.

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Modal analysis of historical masonry structures: Linear perturbation and software benchmarking

Cited by 46 publications

References 37 publications

Dynamic characterization of progressively damaged segmental masonry arches with one settled support: experimental and numerical analyses

Dynamic characterization of progressively damaged segmental masonry arches with one settled support: experimental and numerical analyses

Nonlinear Fe Model Updating for Masonry Constructions via Linear Perturbation and Modal Analysis

Dynamic Behavior of an Inclined Existing Masonry Tower in Italy

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