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    Volume 43, Issue 6 (November 2015)

    In-Situ Field Measurements and Numerical Model Identification of a Multi-Span Steel Railway Bridge

    (Received 10 February 2014; accepted 7 July 2014)

    Published Online: 26 November 2015

    CODEN: JTEVAB

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    Abstract

    In this paper, in situ field measurements and analytical model verification studies of a railway bridge that spans Karakaya Dam Lake between the cities of Malatya and Elazig in Turkey are presented. The bridge consists of 29 simply-supported steel trusses, each having a 64 m span length, giving a total bridge length of 2029.60 m. To understand the actual behaviour of the bridge, static and dynamic tests on the bridge spans were performed. The bridge was instrumented with strain-gauges mounted on the surface of the bridge members, accelerometers placed on the piers, abutments, and truss members and an optical laser based displacement sensor located at mid-span. Then, a three-dimensional finite element model of the bridge was generated using commercially available finite element analysis software using frame elements, a thick shell, and spring and rigid bar elements. The initial numerical model was calibrated using an optimization procedure based on automatically adjusting the spring constants and rigid bar rigidities with the help of MATLAB. Finally, the validity of the calibrated FE model was examined by the vertical displacement measurements.


    Author Information:

    Caglayan, Ozden
    Department of Civil Engineering, Istanbul Technical Univ., Istanbul,

    Ozakgul, Kadir
    Department of Civil Engineering, Istanbul Technical Univ., Istanbul,

    Tezer, Ovunc
    YPU Yapi Proje Uygulama Ltd. Co., Istanbul,

    Piroglu, Filiz
    Department of Civil Engineering, Istanbul Technical Univ., Istanbul,


    Stock #: JTE20140049

    ISSN:0090-3973

    DOI: 10.1520/JTE20140049

    Author
    Title In-Situ Field Measurements and Numerical Model Identification of a Multi-Span Steel Railway Bridge
    Symposium ,
    Committee D04