Volume 42, Issue 1 (January 2014)

    Equipment Fragility Due to Shock Response

    (Received 20 January 2013; accepted 16 May 2013)

    Published Online: 2013

    CODEN: JTEOAD

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    Abstract

    Because of its simplicity, the shock response spectrum has become widely used as a means of describing the shock responses and fragilities of structures and equipment. This paper focuses on the drawbacks of using the shock response spectrum for defining equipment shock tolerance. A cantilever beam with a tip mass was used to model a hypothetical piece of equipment subjected to strong ground motion such as that caused by an explosion. The exact solution from a detailed modal analysis shows that multiple modes of response were excited. Contributions from higher modes can be more predominant than that from the fundamental mode. Assuming the total response of equipment is predominantly in the first mode can lead to significant error. Current shock spectrum procedures for equipment fragility assessment are inadequate, not only because of the physical limitations of shake table tests, but also because of the lack of a reliable analytical model.


    Author Information:

    Tuan, Christopher Y.
    Professor, Dept. of Civil Engineering, Univ. of Nebraska-Lincoln, Peter Kiewit Institute, Omaha, NE


    Stock #: JTE20130018

    ISSN: 0090-3973

    DOI: 10.1520/JTE20130018

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    Author
    Title Equipment Fragility Due to Shock Response
    Symposium , 0000-00-00
    Committee D10