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    An improved approach for multiple support response spectral analysis of a long-span high-pier railway bridge

    Access Status
    Fulltext not available
    Authors
    Li, L.
    Bu, Y.
    Jia, H.
    Zheng, S.
    Zhang, D.
    Bi, Kaiming
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Li, L. and Bu, Y. and Jia, H. and Zheng, S. and Zhang, D. and Bi, K. 2017. An improved approach for multiple support response spectral analysis of a long-span high-pier railway bridge. Earthquake and Structures. 13 (2): pp. 193-200.
    Source Title
    Earthquake and Structures
    DOI
    10.12989/eas.2017.13.2.193
    ISSN
    2092-7614
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/58509
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 Techno-Press, Ltd. To overcome the difficulty of performing multi-point response spectrum analysis for engineering structures under spatially varying ground motions (SVGM) using the general finite element code such as ANSYS, an approach has been developed by improving the modelling of the input ground motions in the spectral analysis. Based on the stochastic vibration analyses, the cross-power spectral density (c-PSD) matrix is adopted to model the stationary SVGM. The design response spectra are converted into the corresponding PSD model with appropriate coherency functions and apparent wave velocities. Then elements of c-PSD matrix are summarized in the row and the PSD matrix is transformed into the response spectra for a general spectral analysis. A long-span high-pier bridge under multiple support excitations is analyzed using the proposed approach considering the incoherence, wave-passage and site-response effects. The proposed approach is deemed to be an efficient numerical method that can be used for seismic analysis of large engineering structures under SVGM.

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