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Abstract:
Two new types of high-order lumped-parameter models (LPMs) for foundation vibrations are proposed. The parameters of LPMs are obtained by comparing the continued-fraction dynamic-stiffness equations of new LPMs with the continued-fraction expansions of a rational function in complex frequency approximating foundation frequency response. Compared with the existing high-order LPMs, the proposed LPMs are easier to extend to high orders, and their physical configurations are condensed and independent of the problem analyzed. Moreover, due to the dynamic equations of LPMs with second-order derivative terms in time, the resulting structure-foundation-soil system can be solved by an explicit time-integration method. The effectiveness of the proposed LPMs is verified by analyzing the benchmark problem of semi-infinite rod on an elastic foundation and comparing with the results of Wu-Lee LPMs.
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Source :
Chinese Journal of Geotechnical Engineering
ISSN: 1000-4548
Year: 2009
Issue: 11
Volume: 31
Page: 1744-1751
Cited Count:
WoS CC Cited Count: 0
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 24
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