Volume 36, Issue 6 (November 2008)

    Modal Analysis, Experimental Validation, and Calibration of a Historical Masonry Minaret

    (Received 29 January 2008; accepted 9 August 2008)

    Published Online: 2008

    CODEN: JTEOAD

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    Abstract

    This paper describes a historical masonry minaret, its finite element modeling, modal testing, and finite element model calibration. İskenderpaşa historical masonry minaret located in Trabzon City Center, Turkey, is selected as an application. Modal analysis is performed on the developed 3-D finite element model of the minaret to obtain the analytical frequencies and mode shapes. The ambient vibration tests on the minaret under environmental excitations, such as traffic loads and wind, are conducted. The output-only modal parameter identification is carried out by using peak picking of the average normalized power spectral densities in the frequency domain and stochastic subspace identification in the time domain. Dynamic characteristics such as natural frequencies, mode shapes, and damping ratios are determined. The finite element model of the minaret is calibrated to minimize the differences between analytically and experimentally estimated modal properties by changing some uncertain modeling parameters such as material properties and boundary conditions. At the end of the study, maximum differences in the natural frequencies are reduced on an average from 27 % to 5 %. A good agreement is also found between analytical and experimental natural frequencies and mode shapes after model calibration.


    Author Information:

    Bayraktar, Alemdar
    Professor, Karadeniz Technical University, Trabzon,

    Altunişik, Ahmet Can
    Research Assistant, Karadeniz Technical University, Trabzon,

    Sevim, Barış
    Research Assistant, Karadeniz Technical University, Trabzon,

    Türker, Temel
    Research Assistant, Karadeniz Technical University, Trabzon,

    Akköse, Mehmet
    Assistant Professor, Karadeniz Technical University, Trabzon,

    Çoşkun, Nart
    Assistant Professor, Karadeniz Technical University, Trabzon,


    Stock #: JTE101677

    ISSN: 0090-3973

    DOI: 10.1520/JTE101677

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    Author
    Title Modal Analysis, Experimental Validation, and Calibration of a Historical Masonry Minaret
    Symposium , 0000-00-00
    Committee C12