Abstract: In the conventional calculation of the thickness of the silo roof, only the average load per unit area is usually considered, including the basic snow pressure, the weight of the silo roof, etc., and the influence of the large weight of filters and pipe rack, platforms on the local stability of the silo roof has not been considered. This problem is more obvious in the calculation of large diameter silos. Therefore, a large silo with a diameter of 15 meters has been taken as an example in this paper. Finite element analysis has been carried out on the stability of its roof under the influence of filter weight and large pipeline load. It is verified that the large concentrated load has adverse effect on the stability of silo roof, and some reasonable suggestions in engineering design have been provided accordingly.

Key words: silo, roof, concentrated load, stability, finite element analysis