Abstract
Tanks have been currently used for the storage of various substances, in particular as drinking water storage tanks and for storage of various technical fluids. Rectangular tanks have advantages over cylindrical tanks, such as: lower sensitivity to unilateral loads and better use of space when used in a system of tanks. The rectangular tank analyzed in this article is filled with water. During the dynamic analysis of the tank, it was loaded by an accelerogram of a natural earthquake. In the calculation, the method of direct integration over time was used, considering damping. From the accelerogram a response spectrum was generated and applied as an additional loading of the tank. The static model of the tank was created in the ANSYS program, which works on the basis of the finite element method (FEM).
Highlights
Tanks have been currently used for the storage of various substances, in particular as drinking water storage tanks and for storage of various technical fluids
The theoretical solution of the method of direct integration in time has been dealt with in [1]. This method consists in a procedure, when the behaviour of the system at the end of the time step has been derived from the conditions at the beginning of the same step
Accelerograms that are used to simulate an earthquake can be natural - obtained from an earthquake, or synthetic generated by programs to meet specified boundary conditions
Summary
The theoretical solution of the method of direct integration in time (step-by-step method) has been dealt with in [1]. This method consists in a procedure, when the behaviour of the system at the end of the time step has been derived from the conditions at the beginning of the same step. The filling in the tank is water, its level reaches to a height of 4 m, which limits the possibility of splashing under dynamic load. The SHELL181 quadrilateral planar shell element was used in the ANSYS program for static modeling of tank walls with a thickness of 200 mm and tank bottom with a thickness of 500 mm. The liquid 3D element FLUID80 was used for modeling water as a tank filling
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