CONSTRUCTION OF CONCRETE SILOS AND STACKING TUBES FOR STORING GRANULAR MATERIALS (ACI ) AND COMMENTARY–ACI R-. ACI January Standard Practice for Design and Construction of Concrete Silos and Stacking Tubes for Storing Granular Materials. Does anyone have experience with ACI and designing steel bins? I am specifically concerned with calculating loads on bins and the.
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Click Here to join Eng-Tips and talk with other members! Lateral loads Subject Areas: What I want is ‘good’ final answer.
Bin design with ACI – Structural engineering other technical topics – Eng-Tips
To me Gaylord and Gaylord is the latest information because that was when Acu first became aware of the overpressure coefficients, although they do present several different ways to do the calcs. An older version of the spec ACI had factors up to 2. You can make more money that way. I think they difference is the horizontal pressure coeficients. What I recall from using the Gaylord book is that they give several different equations and factors, and then say “You can use this one, but some people use this one and this third method seems to work okay too”.
Appears on pages s: Bin design with ACI It looks to me at this point that I will be using a combination of methods depending on if it’s a shallow bunker or deep bin, filling or emptying, funnel-flow or mass-flow, or a vertical wall or hopper. You could go on for years building structures that were seriously overstressed, until finally one collapses. It’s possible that many of the ‘old’ designs exist with a reduced factor of safety.
Red Flag This Post Please let us know here why this post is inappropriate. Does anyone have experience with ACI and designing steel bins? For those so inclined the Jenike and Johanson site at www. I have used ACI quite a bit. This section specifies the overpressure factor to be a minimum of 1. Thanks for the help. The standard includes requirements for seismic design and hopper bottom design. Prior to that the people I knew were using equations published by Ketchum about a hundred years ago based on Janssen’s work.
Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. I am specifically concerned with calculating loads on bins and the use of the overpressure factor in section 4. Bin design with ACI What I recall from using the Gaylord book is that they give several different equations and factors, and then say “You can use this one, but some people use this one and this third method seems to work okay too”.
But that’s just a guess. ACI Committee Publication: Concrete; Filing Info Accession Number: His arguement is that he is confortable with his designs based on his experience and therefore sees no reason to utilize a seemingly more conservative approach.
Gaylord, and I believe the old ACI calculated the lateral pressures based on active pressures with the charted overpressure coeficients.
Defense manufacturing is all about project manufacturing and project accounting. The International Concrete 331-97 Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
This document was replaced by The point to acu learned is that there is not just a wide variation in the methods used, but in the loads themselves. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.
Thanks for the input, -Mike. Afi get the impression when reading the Gaylord text that the value of K is sometimes used as a fudge factor to skew results towards where the researchers want to end up anyways.
I pretty much use the at rest pressure with the 1.
International Concrete Abstracts Portal
Are you an Engineering professional? Appendices; Figures; References; Tables; Pagination: When I first saw the 77 spec I was not comfortable with increasing the designs by a factor of 2. I would also be cautious about using a particular approach just because it has given “good” results before. I think I’m with you on acl in terms of the K factor and overpressure of 1.
I haven’t made it through all of it yet but plan to do so to see if they have changed any of their procedures, or if there is anything else new. Thanks for your comments.
This ACI standard practice gives material, design, and construction requirements for concrete silos, stave silos, and stacking tubes for storing granular materials, It includes design and construction recommendations for cast-in-place or precast and conventionally reinforced or post-tensioned silos.
Promoting, selling, recruiting, coursework and thesis posting is forbidden. Unwillingness to change what has worked forever. It’s one of the books I had forgotten about, or at least couldn’t remember enough to be able to find it again.