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Evaluation of the Behaviour Coefficient of an Elevated RC Tank

Evaluation of the Behaviour Coefficient of an Elevated RC Tank The behaviour coefficient is a parameter introduced in dimensioning codes in order to determine the internal forces and to estimate the inelastic deformations undergone by a structure. For each type of structure, a unique value is associated by various design codes. For the elevated water tank, considered as reverse pendulum structure, this coefficient assumes a constant value (R = 2) in the Algerian seismic code (RPA2003), while Eurocode 8 suggests to take as behaviour factor (q = 1). Recent researches have shown that this behaviour coefficient depends on several parameters. In this study, the effect of various parameters, such as the pedestal height, the ductility of the structure, the soil type and the seismic zone, on the behaviour of the elevated tanks is evaluated considering the current codes and standards. The energy method and the hydrodynamic model developed by Housner are, respectively, used to evaluate the elastic and the ultimate displacement at the top of the reservoir. As a main result of this research, a more realistic law is proposed to evaluate the behaviour coefficient of RC elevated tanks considering several influential parameters. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of The Institution of Engineers (India):Series A Springer Journals

Evaluation of the Behaviour Coefficient of an Elevated RC Tank

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Publisher
Springer Journals
Copyright
Copyright © The Institution of Engineers (India) 2022
ISSN
2250-2149
eISSN
2250-2157
DOI
10.1007/s40030-021-00615-z
Publisher site
See Article on Publisher Site

Abstract

The behaviour coefficient is a parameter introduced in dimensioning codes in order to determine the internal forces and to estimate the inelastic deformations undergone by a structure. For each type of structure, a unique value is associated by various design codes. For the elevated water tank, considered as reverse pendulum structure, this coefficient assumes a constant value (R = 2) in the Algerian seismic code (RPA2003), while Eurocode 8 suggests to take as behaviour factor (q = 1). Recent researches have shown that this behaviour coefficient depends on several parameters. In this study, the effect of various parameters, such as the pedestal height, the ductility of the structure, the soil type and the seismic zone, on the behaviour of the elevated tanks is evaluated considering the current codes and standards. The energy method and the hydrodynamic model developed by Housner are, respectively, used to evaluate the elastic and the ultimate displacement at the top of the reservoir. As a main result of this research, a more realistic law is proposed to evaluate the behaviour coefficient of RC elevated tanks considering several influential parameters.

Journal

Journal of The Institution of Engineers (India):Series ASpringer Journals

Published: Mar 1, 2022

Keywords: Behaviour coefficient; Elevated tank; Ductility; Seismic zone; Pedestal height

References