Title page for ETD etd-12052009-020116

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
  • Storage tanks
Date of Defense 1992-03-01
Availability unrestricted
Several 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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