Dynamic identification of a masonry building using forced vibration tests

Sortis, A. De; Antonacci, Elena; Vestroni, Fabrizio

doi:10.1016/j.engstruct.2004.08.012

Cited by 104 publications

(53 citation statements)

References 9 publications

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“…As a result, the structural component connectivity and load distribution are affected by the amplitude and location of the excitation. This aspect has also been noted by Sortis et al (2005). Additionally, high dissipative forces in a masonry assembly make identification of low-amplitude dynamic features difficult.…”

Section: Dynamic Testsmentioning

confidence: 94%

Calibration under uncertainty for finite element models of masonry monuments

Atamturktur¹,

Hemez²,

Unal³

2010

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About the Cover:The figures on the cover illustrate three aspects of the validation of a computational model developed to predict the vibration response of historic masonry monuments. Top right: The National Cathedral, Washington, DC, where vibration response of vaults is experimentally measured to assess the effect of structural damage. The measurements provide acceleration time series used to verify and validate predictions of the numerical simulation. Top left: The computational finite element model is shown to illustrate the mesh discretization of a vault. The model is analyzed to simulate the vibration response. Colors represent different material properties whose uncertainties are propagated through the calculation. Bottom: The measurement of a vibration mode shape of the structure (solid line) is compared to the prediction of the finite element model (dashed line). Crosses illustrate the uncertainty of predictions due to variability of the boundary conditions and material properties. Statistical tests are implemented to quantify the accuracy of the finite element model, given measurement variability and prediction uncertainty. Tables Table 3- Calibration Under Uncertainty for Finite List of Figures List of ABSTRACTHistorical unreinforced masonry buildings often include features such as load bearing unreinforced masonry vaults and their supporting framework of piers, fill, buttresses, and walls. The masonry vaults of such buildings are among the most vulnerable structural components and certainly among the most challenging to analyze. The versatility of finite element (FE) analyses in incorporating various constitutive laws, as well as practically all geometric configurations, has resulted in the widespread use of the FE method for the analysis of complex unreinforced masonry structures over the last three decades. However, an FE model is only as accurate as its input parameters, and there are two fundamental challenges while defining FE model input parameters: (1) material properties and (2) support conditions. The difficulties in defining these two aspects of the FE model arise from the lack of knowledge in the common engineering understanding of masonry behavior. As a result, engineers are unable to define these FE model input parameters with certainty, and, inevitably, uncertainties are introduced to the FE model.As the complexity of the building increases, as is the case for historical unreinforced masonry buildings, the errors and uncertainties in the analysis also increase. In the presence of high and numerous uncertainties originating from multiple sources, deterministic approaches in which parameters are defined as constant values assumed to be known with certainty cannot be implemented reliably. Probabilistic methods, however, provide a rigorous and rational means in treating the uncertainty present in the FE analysis of historical unreinforced masonry buildings. The way in which uncertainty in historical unreinforced masonry construction is treated is one of the novel and main contributions...

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Section: Dynamic Testsmentioning

confidence: 94%

Calibration under uncertainty for finite element models of masonry monuments

Atamturktur¹,

Hemez²,

Unal³

2010

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“…Modal testing was originally developed in the mechanical and aerospace engineering disciplines (Ewins, 1984;Juang, 1994;Maia and Silva, 1997), where modal parameter identification was based on both input and output measurements. After the modal testing procedure was transferred to civil engineering, this procedure was successfully implemented on different types of civil engineering structures such as bridges (Brownjohn et al, 1992;Brownjohn, 1997;Chang et al, 2001;Zivanovic et al, 2006;Bayraktar et al, 2007a,b), buildings (Venturaet al, 2002;Sortis et al, 2005), stadiums (Reynolds et al, 2004), reactor buildings (Ceballos et al, 1998), dams (Zhou et al, 2000) and silos (Dooms et al, 2006).…”

Section: Modal Testingmentioning

confidence: 99%

Seismic Response of a Historical Masonry Minaret using a Finite Element Model Updated with Operational Modal Testing

Bayraktar

Altunışık

Sevim

et al. 2010

Journal of Vibration and Control

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This paper presents the earthquake response of a historical masonry minaret after a finite element model updating was undertaken using the information from full scale ambient vibration testing. The _ Iskenderpaşa historical masonry minaret dating back to the 16th century with a height of 21m located in the city center of Trabzon, Turkey is selected as an application. Analytical modal analysis is performed on the 3D finite element model of the minaret considering field survey and engineering judgments to obtain the analytical frequencies and mode shapes. The field ambient vibration tests on the minaret under natural excitations such as wind loading and human movement are conducted. The Peak Picking and the Stochastic Subspace Identification techniques are used to extract the modal parameters from the ambient vibration test. A good correlation was found among the modal parameters identified from the two techniques. The finite element model of the minaret is updated to minimize the differences between analytically and experimentally estimated modal properties by changing some uncertain modeling parameters such as material properties and boundary conditions. The analytical model of the minaret after finite element model updating is analyzed using the 1992 Erzincan earthquake record, which occurred near the area, to determine the earthquake behavior of the minaret. At the end of the study, maximum differences in the natural frequencies are reduced on average from 27% to 5% and a good agreement is found between analytical and experimental natural frequencies and mode shapes by model updating. Also, it is seen from the earthquake analysis that the displacements increase along the height of the minaret and the maximum and minimum principal stresses occur at the region of the transition segment and the cylindrical body.

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“…However, there was still no assurance that this solution would provide the desired results. The dynamic analysis and dynamic testing [9][10][11] based on procedures of structural dynamics [12,13] answers the question whether the expected vibration transfer would threaten the structure itself or affect the comfort of those inside the building.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of Forum Gdansk Structure due to Rail Traffic

Miśkiewicz

Pyrzowski

Rucka

et al. 2017

Archives of Civil Engineering

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This paper presents the study of the impact of vibration induced by the movement of the railway rolling stock on the Forum Gdańsk structure. This object is currently under construction and is located over the railway tracks in the vicinity of the Gdańsk Główny and Gdańsk Śródmieście railway stations. The analysis covers the influence of vibrations on the structure itself and on the people within. The in situ measurements on existing parts of the structure allow us to determine environmental excitations used for validation and verification of the derived FEM model. The numerical calculations made the estimates of the vibration amplitudes propagating throughout the whole structure possible.

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Dynamic identification of a masonry building using forced vibration tests

Cited by 104 publications

References 9 publications

Calibration under uncertainty for finite element models of masonry monuments

Calibration under uncertainty for finite element models of masonry monuments

Seismic Response of a Historical Masonry Minaret using a Finite Element Model Updated with Operational Modal Testing

Dynamic Response of Forum Gdansk Structure due to Rail Traffic

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