STANDARDS @ SILOS and cylindrical shells
STANDARDS @ SILOS and cylindrical shells
(OP)
Recently I have been designing silos according to DIN 1055, DIN 4119, DIN 18914 and ECCS recommendations: I would like to exchange opinions with somebody using different standards about calculating wind effects on shells and how to consider ring stiffenings in buckling behaviour.






RE: STANDARDS @ SILOS and cylindrical shells
You have to make some adaptations and create your own models. It is not always possible to apply codes because they are made for some ideal situations like most buckling verifications.
Try to know what you are doing and be reasonable.
Good luck.
RE: STANDARDS @ SILOS and cylindrical shells
While I haven't designed a silo for a long time I would recommend you pay very close attention to the effect of eccentricity and of impact during storage/unloading of the material within. Arching of the material itself, whether grain or cement etc can also produce sudden internal impact during loading or unloading.
Wind effects will be important for an unloaded/empty/part empty concrete shell silo. Whether they would govern the design I'm doubtful, except in cyclonic and very high-wind areas. If the slenderness is large you might also have to look at eddy-shedding which will produce oscillating wind forces.
It's a complex topic. I would be doing a whole lot of reading and then practice, practice.
Anthony Tugwell
Project Director & Consulting Engineer - currently in Kuala Lumpur. Malaysia
RE: STANDARDS @ SILOS and cylindrical shells