Effectiveness of Skewness on Dynamic Impact Factor of Concrete Multicell Box-Girder Bridges Subjected to Truck Loads

Iman Mohseni, A. R. Khalim, Ehsan Nikbakht

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Evaluation of the dynamic response of bridge-vehicle interaction is an interesting topic in bridge engineering. It is an effective way to develop the accuracy of a new generation of reliability-based bridge design specifications. Traditionally, to consider the effect of moving loads on bridge design, the response of bridges using static loads is amplified by a dynamic load factor (dynamic impact factor). Although a considerable amount of studies has been conducted to determine the dynamic impact factor of bridges, it still remains as a controversial issue. The dynamic impact factor is dependent on the dynamic properties of the superstructure and vehicle such as natural frequency, vehicle speed, and many other parameters, which are difficult to take into account. Underestimating the effect of each parameter on the development of new expressions for dynamic impact factor may lead to substantial problems. Hence, the present study focused on the dynamic behavior of multicell box-girder bridges under moving loads. Firstly, the related literature on the effect of vehicle loads on bridges was reviewed to get closer insights into the dynamic behavior of bridges. The effects of various parameters of bridge on dynamic responses are considered. Dynamic impact factor expressions for skew bridges are deduced based on upper bound values of finding results. The comparisons indicate that the current bridge codes unable to estimate accurate values for dynamic responses of skew bridges.

    Original languageEnglish
    Pages (from-to)6083-6097
    Number of pages15
    JournalArabian Journal for Science and Engineering
    Volume39
    Issue number8
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    Box girder bridges
    Concrete bridges
    Trucks
    Dynamic response
    Dynamic loads
    Loads (forces)
    Natural frequencies

    Keywords

    • Bridges-vehicle interaction
    • Impact actor
    • Multicell box girder
    • Skew angle

    ASJC Scopus subject areas

    • General

    Cite this

    Effectiveness of Skewness on Dynamic Impact Factor of Concrete Multicell Box-Girder Bridges Subjected to Truck Loads. / Mohseni, Iman; Khalim, A. R.; Nikbakht, Ehsan.

    In: Arabian Journal for Science and Engineering, Vol. 39, No. 8, 2014, p. 6083-6097.

    Research output: Contribution to journalArticle

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