Dynamic response analysis of solitary flexible rocking bodies: modeling and behavior under pulse-like ground excitation

    Authors

    M. F. Vassiliou; K. R. Mackie;B. Stojadinovic

    Comments

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    Abbreviated Journal Title

    Earthq. Eng. Struct. Dyn.

    Keywords

    rocking structures; fem modelling; overturning stability; seismic; response; SEISMIC RESPONSE; FOUNDATION UPLIFT; RIGID BLOCKS; COLUMNS; EARTHQUAKES; FOOTINGS; BEAM; Engineering, Civil; Engineering, Geological

    Abstract

    Results obtained for rigid structures suggest that rocking can be used as seismic response modification strategy. However, actual structures are not rigid: structural elements where rocking is expected to occur are often slender and flexible. Modeling of the rocking motion and impact of flexible bodies is a challenging task. A non-linear elastic viscously damped zero-length spring rocking model, directly usable in conventional finite element software, is presented in this paper. The flexible rocking body is modeled using a conventional beam-column element with distributed masses. This model is verified by comparing its pulse excitation response to the corresponding analytical solution and validated by overturning analysis of rocking blocks subjected to a recorded ground motion excitation. The rigid rocking block model provides a good approximation of the seismic response of solitary flexible columns designed to uplift when excited by pulse-like ground motions. Guidance for development of rocking column models in ordinary finite element software is provided. Copyright (C) 2014 John Wiley & Sons, Ltd.

    Journal Title

    Earthquake Engineering & Structural Dynamics

    Volume

    43

    Issue/Number

    10

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    1463

    Last Page

    1481

    WOS Identifier

    WOS:000339114600003

    ISSN

    0098-8847

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