Abstract
Evaluation of the margin of safety against collapse of reinforced concrete cylindrical water tanks requires knowledge about the load carrying capacity of the tanks. The limit analysis procedure can be used to estimate the collapse loads of cylindrical tanks. In this paper, determination of the collapse loads of reinforced concrete circular cylindrical water tanks, having varying reinforcement along the height, by applying the limit analysis approach is discussed. The relevant mathematical formulations and the details of the computer program TANK developed for estimating the collapse loads of short, medium height and long cylindrical tanks are presented. The formulations presented are general in nature and different distributions of hoop reinforcement along the height of the tank wall can be considered. The results obtained using this program are found to be in good agreement with those reported in the literature. Numerical results for example problems with different hoop reinforcement distributions are given.
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