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    Large-scale testing of bridge system with unseating mitigation devices under spatially varying ground motions

    Access Status
    Fulltext not available
    Authors
    Shrestha, B.
    Hao, Hong
    Bi, Kaiming
    He, L.
    Ren, W.
    Date
    2017
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Shrestha, B. and Hao, H. and Bi, K. and He, L. and Ren, W. 2017. Large-scale testing of bridge system with unseating mitigation devices under spatially varying ground motions, in Hao, H. and Zhang, C. (eds), Proceedings of the 24th Australian Conference on the Mechanics of Structures and Materials (ACMSM24), Dec 6-9 2016, pp. 627-632. Perth, Australia: Taylor and Francis.
    Source Title
    Mechanics of Structures and Materials: Advancements and Challenges - Proceedings of the 24th Australasian Conference on the Mechanics of Structures and Materials, ACMSM24 2016
    ISBN
    9781138029934
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/59346
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents large-scale shake table experiments carried out to identify the effects of spatially varying ground motions on the response of bridge segments. A shake table array system with two independent shake tables was used to simulate non-uniform ground motions. Bridge model, scaled to 1:6, having two frames of length 8.33 m each was tested with and without the restraining devices. The frames designed to have the fundamental period close to each other as recommended by prevailing bridge codes were tested to stochastically simulated bi-directional spatially varying ground motions. Experiments were also conducted on second bridge model with Superelastic Shape Memory Alloy (SMA) restrainers used to mitigate the large relative displacements at the bridge joint. The results show that spatially varying ground motions could lead to damaging pounding even when the fundamental period of adjacent frames are close to each other.

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