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ACI 350 - when did it originate?
3

ACI 350 - when did it originate?

ACI 350 - when did it originate?

(OP)
Looking for the beginning date of ACI 350, “Code Requirements for Environmental Engineering Concrete Structures". Did it exist in the 1960's?

Specifically - what would an engineer have used or depended on in the 1960's for a design of a water containing tank?...besides his/her wits of course.

RE: ACI 350 - when did it originate?

ACI Committee 350 was organized in 1964. I don't have anything that tells me what the document evolution was.

RE: ACI 350 - when did it originate?

(OP)
The earliest archived 350 material on ACI's website is 1993.

Would the requirement for higher temp. reinforcement be there in the 60's?

RE: ACI 350 - when did it originate?

I checked with one of the guys on the committee in our firm. His answer;
"The oldest ACI 350 committee report I have is 1971. There may be older committee reports that I don’t have. I also have a copy of a 1989 committee report. The general design approach goes back a long time.
The first ACI 350 Code document is 2001. The current Code is 2006. We are currently working on an updated code, but I expect it is still a year or two away from being published."

RE: ACI 350 - when did it originate?

Jede:

Is there an address/contact to send comments to?

Mike McCann
MMC Engineering

RE: ACI 350 - when did it originate?

JAE...prior to the 2001 "Standard", it is likely that a similar "Recommended Practice" document existed, since the committee has been in place for quite some time. I'm out of town but will check older versions of the ACI Manual of Practice for such when I get back in.

It is likely that designers used ACI 318, AWWA and PCA guidelines before the ACI standard was developed. I did tank design in the 70's by AWWA standards, but those were mostly steel. When we did concrete design I'm pretty sure it was only AWWA, PCA and 318.

Check with Charles Hanskat of Hanskat Consulting in Chicago. He has been doing this for over 35 years.

RE: ACI 350 - when did it originate?

Mike, if you have a comment, I would send it to:
ACI Managing Director of Engineering
P.O. Box 9094
Farmington Hills, MI 48333.
I'd ask for an acknowledgement that it was received.

RE: ACI 350 - when did it originate?

Thanks Jed.

Mike McCann
MMC Engineering

RE: ACI 350 - when did it originate?

Per the attached link
"History of Tank’s Seismic Design
Analytical studies were undertaken in the late 1940s through the early 1960s by Jacobsen at Stanford and Housner at Cal-Tech. Lydik Jacobsen, under a grant from the U. S. Navy, analyzed the dynamic forces exerted by a fluid on the inside of a cylindrical tank and on the outside of a cylindrical pier. The two cases are similar from a theoretical standpoint. This analysis was then used both for the design of tanks and for submerged piers or caissons in a marine environment.
By analyzing what he called impulsive hydrodynamic forces of fluids, he derived graphs from which values for the "effective" mass of the fluid could be obtained for various height-to-diameter ratios. This "effective" mass then had an appropriate seismic force factor applied to it to obtain the seismic shear. The method was still in use by many engineers well into the 1980s. It is interesting to compare his findings with current practice.
After the 1964 Alaska earthquake, a major study was made of tank failures which resulted in the basic methodology, as described above, for the linear static procedure still in use. In the late 60s, analytical studies began to appear in the literature by Veletsos and others who attempted to provide a theoretical framework to account for actual vessel behavior during earthquakes. This has continued to the present date with more sophisticated studies that attempt to predict behavior with varying combinations of shell thickness, foundation and soil interaction characteristics. However, a general procedure has not yet appeared."

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.

RE: ACI 350 - when did it originate?

Here is another article on concrete tank design from Structure Magazine, July 2009 issue...

http://www.structuremag.org/article.aspx?articleID...

Besides the PCA, it also Mentions one other source - the US Department of Reclamation - 8th Edition in 1981, so it must go back aways.

Mike McCann
MMC Engineering

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