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Seismic response of flexible cylindrical tanks

Conference:

Abstract

An experimental study of the seismic behavior of thin shell circular cylindrical liquid storage tanks is described. The investigation was planned to evaluate the adequacy of present methods of tank design, and was conducted using the Earthquake Simulator Facility of the University of California, Berkeley. The model tank considered in this paper was 6 ft high by 12 ft in diameter, and was welded from thin sheet aluminum to simulate a steel tank 36 feet in diameter. During testing the tank had an open top, held 60 inches of water, and was subjected to a time scaled El Centro (1940) earthquake, amplified to a peak acceleration of 0.5 g. Both base free and base fixed conditions were studied. Results of the experiments demonstrate that fluid pressures included both impulsive and convective components, and that the wave sloshing followed basic theory quite closely. But it also was apparent that the tank flexibility influenced the hydrodynamic pressures, as indicated by pressure amplification in the clamped tank, and by a total change of pressure history in the unclamped case. Significant out of round distortions of the tank were developed, of a three lobe form or the free base case and with four lobes  More>>
Authors:
Jaeger, T A; Boley, B A [1] 
  1. comps.
Publication Date:
Jan 01, 1977
Product Type:
Conference
Report Number:
INIS-mf-4639; CONF-770807-(Pt.Kb)
Reference Number:
AIX-10-426525; ERA-04-054938; EDB-79-117497
Resource Relation:
Conference: 4. international conference on structural mechanics in reactor technology, San Francisco, CA, USA, 15 Aug 1977
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; CYLINDERS; SEISMIC EFFECTS; TANKS; DEFORMATION; FREQUENCY RESPONSE TESTING; HYDRODYNAMICS; LIQUIDS; PRESSURE DEPENDENCE; SIMULATION; STRESSES; CONTAINERS; FLUID MECHANICS; FLUIDS; MECHANICS; TESTING; 220900* - Nuclear Reactor Technology- Reactor Safety
OSTI ID:
6074965
Research Organizations:
Commission of the European Communities, Brussels (Belgium)
Country of Origin:
CEC
Language:
English
Submitting Site:
INIS
Size:
Pages: v
Announcement Date:
May 13, 2001

Conference:

Citation Formats

Jaeger, T A, and Boley, B A. Seismic response of flexible cylindrical tanks. CEC: N. p., 1977. Web.
Jaeger, T A, & Boley, B A. Seismic response of flexible cylindrical tanks. CEC.
Jaeger, T A, and Boley, B A. 1977. "Seismic response of flexible cylindrical tanks." CEC.
@misc{etde_6074965,
title = {Seismic response of flexible cylindrical tanks}
author = {Jaeger, T A, and Boley, B A}
abstractNote = {An experimental study of the seismic behavior of thin shell circular cylindrical liquid storage tanks is described. The investigation was planned to evaluate the adequacy of present methods of tank design, and was conducted using the Earthquake Simulator Facility of the University of California, Berkeley. The model tank considered in this paper was 6 ft high by 12 ft in diameter, and was welded from thin sheet aluminum to simulate a steel tank 36 feet in diameter. During testing the tank had an open top, held 60 inches of water, and was subjected to a time scaled El Centro (1940) earthquake, amplified to a peak acceleration of 0.5 g. Both base free and base fixed conditions were studied. Results of the experiments demonstrate that fluid pressures included both impulsive and convective components, and that the wave sloshing followed basic theory quite closely. But it also was apparent that the tank flexibility influenced the hydrodynamic pressures, as indicated by pressure amplification in the clamped tank, and by a total change of pressure history in the unclamped case. Significant out of round distortions of the tank were developed, of a three lobe form or the free base case and with four lobes in the fixed base case. Uplift of the tank base was closely related to the out-of-round deformation of the unanchored tank, whereas initial eccentricities apparently caused the section distortions in the anchored system. Stresses in the tank wall do not follow the expected pattern of response to overturning moment; instead they seem to be mainly associated with the section distortions. At present there is no analytical procedure for predicting these distortions .}
place = {CEC}
year = {1977}
month = {Jan}
}