Dynamic investigation on the Mirandola bell tower in post-earthquake scenarios

Fragonara, Luca Zanotti; Boscato, Giosuè; Ceravolo, Rosario; Russo, Salvatore; Ientile, Silvia; Pecorelli, Marica Leonarda; Quattrone, Antonino

doi:10.1007/s10518-016-9970-z

Cited by 54 publications

(17 citation statements)

References 32 publications

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“…First, this allows gathering further in‐depth insights on the current condition of damaged buildings, which can reveal beneficial for the knowledge of their structural behaviour. Moreover, because masonry historical structures are highly vulnerable to seismic swarms (aftershocks can cause further damage due to the accumulated damage in masonry as well as to damage on the structure that exposes vulnerabilities), a calibrated FE model of the structure representing the current behaviour is of great importance for the safety assessment with respect to aftershocks expected before the repairing.…”

Section: Introductionmentioning

confidence: 99%

“…AVT has been successfully adopted to assess the current global behaviour of historical structures in several applications. Many of these applications involve masonry towers and have multiple goals, such as structural identification, seismic assessment, evaluation of the bell swinging effects, evaluation of the reinforcing intervention effectiveness, and damage assessment . Some investigations related to arched structures, churches, and monuments can also be found in literature.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, AVT and calibrated FE models are of great importance for evaluating the modifications in the global structural behaviour, which can be due, for instance, to earthquake‐induced damage or to retrofitting interventions …”

Section: Introductionmentioning

confidence: 99%

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Ambient vibration-based finite element model updating of an earthquake-damaged masonry tower

Bassoli

Vincenzi

D’Altri

et al. 2018

Struct Control Health Monit

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This paper presents a vibration-based model updating procedure for historical masonry structures which have suffered severe damage due to seismic events.This allows gathering in-depth insights on the current condition of damaged buildings, which can be beneficial for the knowledge of their actual structural behaviour and, consequently, for the design of repairing and strengthening interventions. The methodology, based on the experimentally identified modal parameters, is tested on the San Felice sul Panaro medieval fortress, which was heavily damaged by the 2012 Emilia earthquake. The finite element mesh of the structure in its post-quake condition is generated by means of a nonstandard semi-automatic mesh generation procedure based on a laser scanner points cloud. Ambient vibration testing is performed on the main tower of the fortress. Mechanical properties of the tower and the level of connections with the rest of the fortress in its current damaged state are investigated. To fully characterize the actual behaviour of the tower in operational condition, mesh elements corresponding to the damaged masonry are identified and different material properties are assigned to them. This allows to account for the effect of damage and cracks, which appeared essential in the calibration process. The updating procedure is carried out by means of an advanced surrogate-assisted evolutionary algorithm designed for reducing the computational effort.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ambient vibration-based finite element model updating of an earthquake-damaged masonry tower

Bassoli

Vincenzi

D’Altri

et al. 2018

Struct Control Health Monit

View full text Add to dashboard Cite

show abstract

“…The obtained values of the fundamental frequencies are similar to the characteristics of other masonry towers. In the paper [ 29 ], the values for 30 masonry towers with heights of 16–46 m are summarized. They are between 0.61 Hz and 5.28 Hz.…”

Section: Discussionmentioning

confidence: 99%

Material Parameters Identification of Historic Lighthouse Based on Operational Modal Analysis

2020

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In the present paper, the identification of the material parameters of a masonry lighthouse is discussed. A fully non-invasive method was selected, in which the material properties were determined via numerical model validation applied to the first pair of natural frequencies and their related mode shapes, determined experimentally. The exact structural model was built by means of the finite element method. To obtain experimental data for the inverse analysis, operational modal analysis was applied to the structure. Three methods were considered: peak picking (PP), eigensystem realization algorithm (ERA) and natural excitation technique with ERA (NExT-ERA). The acceleration’s responses to environmental excitations, enhanced in some periods of time by sheet piling hammering or by sudden interruptions like wind stroke, were assumed within the analysis input. Different combinations of the input were considered in the PP and NExT-ERA analysis to find the most reasonable modal forms. A number of time periods of a free-decay character were considered in the ERA technique to finally calculate the averaged modal forms. Finally, the elastic modulus, Poisson’s ratio and material density of brick, sandstone and granite masonry were determined. The obtained values supplement the state of the art database concerning historic building materials. In addition, the numerical model obtained in the analysis may be used in further cases of structural analysis.

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“…Regarding current research in the field of earthquake resistance of architectural heritage, stress response and the damage mechanism of architectural heritage during earthquakes have been analyzed by theoretical model establishment and software simulation, experimental tests, monitoring data feedback and other methods, and then measures of seismic performance improvement have been given or seismic guiding principles proposed. In the aspect of theoretical model establishment, existing research into the mechanics of various materials and structural mechanics have been mainly used as references, and an improved theory of mechanics or models have also been adopted as research support [1][2][3][4][5], the simulation analysis tools mainly used are finite element analysis (FEA) software such as ANSYS [6][7][8][9][10], 3Muri [11][12][13], ABAQUS [14,15], SATATS [16], BrickWORK [17], TREMURI [18], etc. ; from the aspect of experimental testing, earthquake response characteristics have usually been obtained by the shaking table test [19] and ambient vibration tests [20][21][22], the intensity index is mainly detected by the triaxial compression test [23]; from the aspect of data monitoring, data obtained by monitoring tend to be used for structural safety assessments and structural strength improvement [24][25][26][27]; at the time of studying earthquake damage mechanisms, there have been macroscopic assessments for architectural heritage for some materials or structures [28][29][30][31][32], and in-depth assessments on architectural heritage monomers [33][34]…”

Section: Introductionmentioning

confidence: 99%

A Seismic Capacity Evaluation Approach for Architectural Heritage Using Finite Element Analysis of Three-Dimensional Model: A Case Study of the Limestone Hall in the Ming Dynasty

Chen

Wang

et al. 2018

Remote Sensing

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A lot of architectural heritage in China are urgently in need to carry out seismic assessment for further conservation. In this paper, a seismic capacity evaluation approach for architectural heritage using finite element analysis with precision three-dimensional data was proposed. The Limestone Hall of Shaanxi Province was taken as an example. First, low attitude unmanned aerial vehicle photogrammetry and a close-range photogrammetry camera were used to collect multiple view images to obtain the precision three-dimensional current model of the Limestone. Second, the dimensions of internal structures of Limestone Hall are obtained by means of structural analysis; re-establishing the ideal model of Limestone Hall based on the modeling software. Third, a finite element analysis was conducted to find out the natural frequency and seismic stress in various conditions with the 3D model using ANSYS software. Finally, the seismic capacity analysis results were comprehensively evaluated for the risk assessment and simulation. The results showed that for architectural heritage with a multilayer structure, utilizing photogrammetric surveying and mapping, 3D software modeling, finite element software simulation, and seismic evaluation for simulation was feasible where the precision of the modeling and parameters determine the accuracy of the simulation. The precise degree of the three-dimensional model, the accurate degree of parameter measurement and estimation, the setting of component attributes in the finite element model and the strategy of finite element analysis have an important effect on the result of seismic assessment. The main body structure of the Limestone Hall could resist an VII-degree earthquake at most, and the ridge of the second floor could not resist a V-degree earthquake due to unsupported conditions. The maximum deformation of the Limestone Hall during the earthquake occurred in the tabia layer below the second roof.

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Dynamic investigation on the Mirandola bell tower in post-earthquake scenarios

Cited by 54 publications

References 32 publications

Ambient vibration-based finite element model updating of an earthquake-damaged masonry tower

Ambient vibration-based finite element model updating of an earthquake-damaged masonry tower

Material Parameters Identification of Historic Lighthouse Based on Operational Modal Analysis

A Seismic Capacity Evaluation Approach for Architectural Heritage Using Finite Element Analysis of Three-Dimensional Model: A Case Study of the Limestone Hall in the Ming Dynasty

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