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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Red Flag This Post Please let us know here why this post is inappropriate. I get slighlty higher lateral pressures, but he uses slightly higher impact factors Gaylords factors. Ai am doing an investigation now and will begin writing a program to do these calcs when I can determine the best way to proceed.
When I get into other types of bins I like to have testing done to verify the lateral pressures. I would also be cautious about using a particular approach just because it has given “good” results before.
He uses the Gaylord’s infomation. Download Now White Paper: It seems to me that many bins have been sucessfully designed in the past just using filling pressures per the Janssen equation, but on the other hand, published literature does clearly indicate that pressures during emptying are greater.
Does anyone have experience with ACI and designing steel bins? Resources Digital Transformation may be defined in a 31397 of different ways by analysts or enterprise software vendors. Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. Bin design with ACI aggman, You mention that you work with someone who has been aco this for years that uses Gaylords information and is unwilling to change.
Defense manufacturing is all about project manufacturing and project accounting.
Bin design with ACI – Structural engineering other technical topics – Eng-Tips
For hoppers both the Jenike and Walker equations are probably satisfactory. A newer version of this document exists. Buzek as the author. While this standard refers to Building Code Requirements for Structural Concrete ACI for many requirements, it puts forth special requirements for the unique cases of static and dynamic loading from funnel flow, concentric flow, and asymmetric flow in silos, and special loadings on stacking tubes.
Very true about the older designs. Acci there are any suggestions or if anyone knowns of a source of good information, please let me know. It’s possible that many of the ‘old’ designs exist with a reduced factor of afi. This ACI standard practice gives material, design, and construction requirements for reinforced concrete silos, stave silos, and stacking tubes for storing granular materials.
I pretty much use the at rest pressure with the 1. Unwillingness to change what has worked forever. I 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. The Eng-Tips staff will check this out and take appropriate action.
International Concrete Abstracts Portal
Promoting, selling, recruiting, coursework and thesis posting is forbidden. You can make more 313–97 that way. Concrete construction ; Design standards ; Earthquake resistant design ; Granular materials ; Reinforced concrete ; Reinforcing steel ; Silos ; Stresses ; Structural analysis ; Structural design Uncontrolled Terms: International Concrete Abstracts Portal.
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”. Posting Guidelines Promoting, 313-977, recruiting, coursework and thesis posting is forbidden.
But that’s just a guess. To me Gaylord and Gaylord is the latest information because that was when I first became aware of the overpressure coefficients, although they do present several different ways to do the calcs. Are you an Engineering professional?
I like the ACI method because it is a published spec instead of a bunch of research papers. When I first saw the 77 spec I was not comfortable with increasing the designs by a factor of 2. It seems to work out fairly close. As a consultant I feel I need to follow guidelines established by nationally recognized authorities even thought there are few.
This section specifies the overpressure factor to be a minimum of 1. The point to be learned is that there is not just a wide variation in the methods used, but in the loads themselves. A company I worked for years ago doesn’t even have an engineer on staff anymore.
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. Geotechnology; Highways; Materials; I I think they difference is the horizontal pressure coeficients. ACI Committee Publication: Any help will be appreciated. I’ve come to the conclusion that many of the homemade bins and the bins produced by small inexperienced fab shops have less than the desired factor of safety.
Thanks for your comments. Appendices; Figures; References; Tables; Pagination: Silos and stacking tubes are special structures, posing special problems not encountered in normal building design. Appears on pages s: Students Click Here Join Us!
Click Here to join Eng-Tips and talk with other members! Close this window and log in. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. It’s one of the books I had forgotten about, or at least couldn’t remember enough to be able to find it again.