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Undergraduate Research Project Management System

Comparison Study on Linear-Elastic and Nonlinear-Inclastic Seismic Responses to Fluid Tank Systems

Status Complete
Seeking Researchers No
Start Date 09/01/2003
End Date 06/30/2004
Funding Source Undergraduate Research Grants
Funding Amount
Community Partner
Related Course
Last Updated 07/05/2008 01:25AM
Keywords

People

Faculty
  He Liu, Joey Yang

Student Researchers
  Nikolai Petrov

Abstract

Although liquid containment structures have, over the years, performed reasonably well during earthquakes, a large number of them have been damaged and some have even collapsed. Many tanks were considerably damaged during the 1964 Alaska earthquake. Current knowledge about the behavior of liquid storage tanks is extensive, but many of the analytical and theoretical results are for tanks without roof systems, and based on a number of simplifying assumptions, for example, small deformation and linear elastic material property assumptions, which are not really true in practice. The goal of this project is to explore the effects of large deformation and nonlinear material properties on the seismic response of fluid/tank systems. Results from this study will show how the assumptions and material properties selected affect the model outputs in terms of displacement, base shear and stresses. Particularly, the ratios of maximum base shear between linear elastic and nonlinear models will be computed and compared with the force reduction coefficient R W based on AWWA (American Water Works Association) Standard. This proposed study will provide a solid database for the selection and possible revision of the force reduction coefficient R W in the design code, and provide insight into the nonlinear responses of liquid-storage tanks.

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