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Title: Comparison of Several Methodologies Used for Designing Tabletop Foundations

Author(s): Mukti Lal Das

Publication: Symposium Paper

Volume: 348


Appears on pages(s): 35-46

Keywords: Rule-of-thumb, Eigenvalues, Rayleigh frequencies, Turbine force amplitude

DOI: 10.14359/51732678

Date: 3/1/2021

The availability of high-speed computers at a reasonable price resulted in various sophisticated analysis and design methodologies for the elevated flexible pedestal (Tabletop) foundations replacing the rule-of-thumb processes based on static equivalent principle which used to produce either unsafe or overly conservative structures. A thorough study is undertaken with four typical models usually selected for static and dynamic analyses in the structural/mechanical engineering practice. It is found that all the models provide comparable results. However, each one has its own advantages and disadvantages. These will be highlighted in the Summary and Concluding Remarks of this paper.