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Evaluation of the Behaviour Coefficient of an Elevated RC Tank

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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.

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Funding

The authors wish to thank the Algerian Ministry of higher education and scientific research for funding the University education research project (PRFU—N° A01L02UN150120180002) and Tassili Project (PHC—18MDU121).

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Authors and Affiliations

  1. Department of Civil Engineering, Mouloud Mammeri University, 15000, Tizi Ouzou, Algeria

    Ourdia Ider, Hocine Hammoum, Karima Bouzelha & Amar Aliche

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  1. Ourdia Ider
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Correspondence to Hocine Hammoum.

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Ider, O., Hammoum, H., Bouzelha, K. et al. Evaluation of the Behaviour Coefficient of an Elevated RC Tank. J. Inst. Eng. India Ser. A 103, 1–15 (2022). https://doi.org/10.1007/s40030-021-00615-z

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