Abstract:

This pager presents the effect of three models for large tank foundation upon the stress calculation of tank shell. The calculated results show that the different models for tank foundation greatly influence the shear edge force Q_o and the bending moment M，but not so much the value of the maximum stress in the shell，Two methods on elastic half space solution agree with sand or smaller sand foundation, However，the model of separate spring foundation is more suitable for the foundation supported by a concrete ring wall, The necessity that Q and M should be calculated more exactly by selecting appropriate models is also stated in this paper.

Key words: Tank bottom, Tank foundation, Stress analysis