I have the work of adapting a calculation system of grain bins from 1987 version to the 2005 version of the DIN 1055-6 "Design loads for buildings and loads in silo bins" (at the moment only in german). It is supposed to be based on Eurocode 1 part 4 but DIN is much more complicated, with a lot of formulae and differnet coefficients that make very difficult to structurate the calculation in some kind of flow-chart in order to automatize it.Has anybody started to work with this standard?Thank you and kind regards.Odra.Reply With Quote Reply With Quot1th October 2005, 10:34 #2 J.Elizalde J.Elizalde is offline've calculated metal silos with the Eurocode 3 Part 4.1 using this guide: GUIDE FOR THE ECONOMIC DESIGN OF CIRCULAR METAL SILOS, J. Michael RotterI think it will help you a lot if you want to automatize calculations.INGESOA S.A.L.Navarra (SPAIN)j.elizalde@ingesoa.comwww.ingesoa.comReply With Quote Reply With Quote17th October 2005, 14:00 #3 Odradek7 Odradek7 is offlineThak you (eskerrik asko) for your reply.I have seen the EC3 part 4.1 and is my intention to work with it in the future. It refers many times to "validated numerical analisys" (FEM i understand) but at the moment I am concentrated in analytical models. Nevertheles, for the determination of the loads you should use the EC1 part 4, in which DIN 1055-6 (2005 version) is supposed to be based. This DIN standard, for example, makes a reliability classificatin similar to the one of the EC3-4.1 but limits the Class 3 silos to that ones with a capacity of more than 10.000 ton (EC3-4.1 5.000 tons).Regards.Gorka.Reply With Quote Reply With Quote23rd October 2005, 21:59 #4 Michael Rotter Michael Rotter is offlineAs the prime author of both EN 1991-4 (Eurocode 1 Part 4 dealing with loads on bins and silos) and EN 1993-4-1 (Eurocode 3 Part 4.1 dealing with the structural design of steel bins and silos), please feel free to contact me directly with any queries: I will try to help you out.m.rotter@ed.ac.ukDear Mr Rotter,Your book is really helpful. With no doubt it is the definitive guide to the design of metal silos.Is there going to be another one for concrete silos? That would be fantastic.Best Regards,Mr Joseba ElizaldeINGESOA S.A.L.Navarra (SPAIN) j.elizalde@ingesoa.comwww.ingesoa.com9th November 2005, 18:00 #6 Odradek7 Odradek7 is offlineAnyway, I wold like to know if any bibliography has been published regarding this new standard. Perhaps is too early to have something like the "Silo Handbuch" by Martens. Any meeting or conference?

Kind Regards.Gorka.Reply With Quote Reply With QuoteI've been using this code for almost a year now. Indeed it is a little more complicated than the equivalent Eurocode.

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Please note that the DIN 1055-6 code has some errors. (for example formula 73 and formula 114). The exact formulas should be taken from the Eurocode.Very helpfull is Professor J.Michael Rotters book "Guide for the economic design of circular metal silos".The new Eurocode (and the DIN) was developed under supervision of Prof. Rotter.One thing you should know when you make calculations according the new code, is that hopper pressures are considerably smaller than in the old code, especially when storing solids with low wall friction. Special care should be taken when designing the hopper and the hopper-cylinder junction. The extra safety margin that was available when using the old code is completely lost here.Kind regardsStefan Reumers

Quote Originally Posted by Michael Rotter View PostAs the prime author of both EN 1991-4 (Eurocode 1 Part 4 dealing with loads on bins and silos) and EN 1993-4-1 (Eurocode 3 Part 4.1 dealing with the structural design of steel bins and silos), please feel free to contact me directly with any queries: I will try to help you out.

m.rotter@ed.ac.ukBest of luck! Michael RotterIt is my plesure to ask you directly I am reviwing a Clinker silo desinged with the EN1 part 4, I just got a qestion which me and the desinger did not agree and hope you can advise.In calcuation of Phf the value of Zo do we use Umax and Kmax or we use the mean value. please note that when I use Umax and Kmax they result on getting smaller Zo.In calculation of all forces acting on the silo shall be apply the rule of the max and min value of them as well .Do we use the gama supplied by the process engineer or we should use the one in the EN code (Or we use the greater ).Thanks and best regardsKhaled_eid@yahoo.com

20th May 2009, 14:44 #9 Stef R. Stef R. is offlineIn order to design a silo properly, one should take into account all possible combinations of µ and K.This means max. value of µ should be combined with the maximum and minimum value of K, and the maximum value of K should be combined with the maximum and minimum value of µ.This is the only safe way to design the silo for all possible loads.For example, the maximum value of K combined with the minimum value of µ will give the highes orthogonal stress on the cylinder wall, while the maximum value of K combined with the maximum value of µ will give the highest wall friction on the cylinder.I hope this answers your questiontefan

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