Type of Document Master's Thesis Author Zmerli, Mustapha URN etd-12052009-020116 Title Optimization of the bottom plate of a ground-supported liquid storage tank Degree Master of Science Department Civil Engineering Advisory Committee
Advisor Name Title Plaut, R. H. Committee Chair Barker, R. M. Committee Member Holzer, S. M. Committee Member Keywords
- Storage tanks
Date of Defense 1992-03-01 Availability unrestricted AbstractSeveral tanks have failed due to intolerable differential settlements,
causing major problems in most cases. The objective of this study is to
optimize the bottom plate of the tank so that the differential settlements are
reduced to a minimum. Circular plates on an elastic half-space are
investigated and the improvements in differential settlements are reported.
The plates are loaded by a uniform pressure, and the effects of edge loads, edge
moments, and elastic restraints at the edge are considered. A plate with two
annular segments having fixed radii is investigated for optimal thicknesses.
The plate is also optimized by varying both the radii and the thicknesses.
Another plate with three segments is studied, varying the radii and the
thicknesses. In all these cases, the plates are examined for a wide range of
relative stiffnesses. For a specific relative stiffness, a plate with ten segments
of fixed radii is studied. Also, the contact stress distribution is investigated for
the case of the three-segment plate. During the study, the results are
compared to a uniform plate. As an outcome, the differential settlement is
significantly improved compared to the widely used uniform plate.
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