Nonlinear Analysis of a Building Surmounted by a RC Water Tank under Hydrodynamic Load

Authors: Hocine Hammoum, Karima Bouzelha, Lounis Ziani, Lounis Hamitouche

Abstract:

In this paper, we study a complex structure which is an apartment building surmounted by a reinforced concrete water tank. The tank located on the top floor of the building is a container with capacity of 1000 m³. The building is complex in its design, its calculation and by its behavior under earthquake effect. This structure located in Algiers and aged of 53 years has been subjected to several earthquakes, but the earthquake of May 21^st, 2003 with a magnitude of 6.7 on the Richter scale that struck Boumerdes region at 40 Kms East of Algiers was fatal for it. It was downgraded after an investigation study because the central core sustained serious damage. In this paper, to estimate the degree of its damages, the seismic performance of the structure will be evaluated taking into account the hydrodynamic effect, using a static equivalent nonlinear analysis called pushover.

Keywords: Performance analysis, building, reinforced concrete tank, seismic analysis, nonlinear analysis, hydrodynamic, pushover.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1125805

References:

[1] DTR B-C 2-48, Algerian seismic code - RPA 2003, CGS, Algiers, 2003.
[2] S. Hamitouche, H. Hammoum, K. Bouzelha, N.E. Hannachi, “Expertise of an apartments building surmounted by a tank with a container capacity of 1000 m3 in Algiers”, In “Recent advances in integrity – reliability – failure”, J.F. Silva Gomes, S.A. Meguid (editors), INEGI Ed., Porto, Portugal, 2013, pp. 393-394.
[3] L. AitL'Hadj, H. Hammoum, K. Bouzelha, “Nonlinear Analysis of an Apartment Building surmounted with a Reinforced Concrete Water Tank”, in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 155, 2015. doi:10.4203/ccp.108.155
[4] Applied Technology Council, The seismic evaluation and retrofit of concrete building - ATC40, (1/2), Redwood, City, California, USA, 1996.
[5] J.M. Geiser, Execution drawings of an apartments building surmounted by a tank, Algiers, Algeria, 1957.
[6] G. W. Housner, The dynamic behavior of water tanks,Bulletin of the Seismological Society of America, vol. 53, no 2, 1963, pp. 381-387.
[7] H. Hammoum, K. Bouzelha, D. Slimani, “Seismic risk of RC water storage elevated tanks: Case study”, in A. S. H. Makhlouf, M. Aliofkhazraei (Editors), “Handbook of Materials Failure Analysis with Case Studies from the Chemicals, concrete and Power industries”, Elsevier Ed., Oxford, UK, 187-217, 2015.
[8] Computers and Structures Inc. (CSI), Program-Extended Tridimensional Analysis of building Structures – ETABS, Berkeley, California, USA, 1995.
[9] EMS98, L’Echelle Macrosismique Européenne 1998. Conseil de l’Europe, Cahiers du Centre Européende Géodynamique et de Séismologie, vol. 19, 2001.