The current growth and development of cities makes the demand for the construction of reservoirs is increasing. Currently the most used reservoirs are rectangular, for containing materials of different types, and the cylindrical reservoirs very little spread and adopted for this purpose. The cylindrical reservoirs have lower stress on the walls compared to rectangular and with the advancement of computers and the use of finite element method analysis of such structures becomes increasingly simple. This work aims to study of structural concrete reservoirs. Short and long cylinders considered. Five cases were studied by various analytical methods throughout this work. For all of them computational models were carried out with the finite element method using SAP2000 program, and the results obtained were compared with the analytical formulation proposed by some authors. In the case of reservoir formulation considered as long shells, the responses were calculated by the Markus (1976) and the Classic Shell Theory. The response obtained by both methods are close and consistent. For reservoirs considered as short shells, it was used the formulation of FISCHER (1968) and EZEH et al. (2014). The results of these formulations demonstrated that at in most cases, mainly for long reservoirs, they are all consistent with those obtained by the finite elements method. For the particular case of short reservoirs studied by EZEH et al. (2014), the results have shown that there is a difference, that varies from 28 percent to 32 percent, both for displacement and circumferential strength N0, and a difference of up to 96 percent in the position where the maximum occurs. For the case of short reservoirs studied with the expressions of FISCHER (1968), the results show that the behavior of the curves along the wall height are equal in comparison with the results obtained by SAP2000, but there is a difference of up to four times in upper edge of this type of reservoirs for the force and the displacement, respectively.