Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: CONCRETE: Repair of Segmental Post-Tensioned Concrete Tank

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Sorry about that.........Westminster,  CA

On 7/30/05, Auge, Ken <Ken.Auge(--nospam--at)dot.state.co.us> wrote:
> Where is the Westminster tank?  I live near a Westminster, Colorado
> tank.
> Thanks,
> Ken Auge
> 4732 W. 102nd Ave.
> Westminster, CO 80031
> 
> -----Original Message-----
> From: Robert Kazanjy [mailto:rkazanjy(--nospam--at)gmail.com]
> Sent: Friday, July 29, 2005 7:34 PM
> To: seaint(--nospam--at)seaint.org
> Subject: Re: CONCRETE: Repair of Segmental Post-Tensioned Concrete Tank
> 
> Bill-
> 
> I had the opportunity to walk the failed Westminster tank.  It was a
> lined (looked like some sort of heavy plastic not at all a rubberized
> material) but they still had a little trouble with leaks.
> 
> Anyway, my recollection (a little fuzzy perhaps) is that it failed
> because of corrosion (helped by the leaks)  of the mild steel
> reinforcement NOT the loss of PT.
> 
> Again recalling the site visit, IMO the pos-tensioning steel was
> placed in such a location that portions of  the "footing /
> foundation" that were never intended to take tension load did in fact
> wind up in tension.  Once corrosion took it's toll, the tank failed
> 
> A few (one or two?) of the precast panels blew out at the base and
> were washed some short distance away.  They may have survived intact.
> The remaining ~30 segments remained standing along with the roof.
> 
> The consensus engineering position was that the tank was repairable
> (as was the still functioning twin)  but that such a solution would
> never fly politically.
> 
> I'm pretty sure the tank was demo'd (along with it's cross town twin)
> and replaced.
> 
> How big is  your tank?  How tall?  Cost of failure?  Cost to replace?
> Desired continued service life?  Budget to retrofit?
> 
> IMO a liner is the way to handle the leaks, short of replacement
> 
> How about adding some external P/T hoops?
> or maybe a couple FRP bands?
> or some really big SS hose clamps?  :)
> 
> cheers
> Bob
> 
> ******* ****** ******* ******** ******* ******* ******* ***
> *   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> *
> *   This email was sent to you via Structural Engineers
> *   Association of Southern California (SEAOSC) server. To
> *   subscribe (no fee) or UnSubscribe, please go to:
> *
> *   http://www.seaint.org/sealist1.asp
> *
> *   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you
> *   send to the list is public domain and may be re-posted
> *   without your permission. Make sure you visit our web
> *   site at: http://www.seaint.org
> ******* ****** ****** ****** ******* ****** ****** ********
> 
> ******* ****** ******* ******** ******* ******* ******* ***
> *   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> *
> *   This email was sent to you via Structural Engineers
> *   Association of Southern California (SEAOSC) server. To
> *   subscribe (no fee) or UnSubscribe, please go to:
> *
> *   http://www.seaint.org/sealist1.asp
> *
> *   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you
> *   send to the list is public domain and may be re-posted
> *   without your permission. Make sure you visit our web
> *   site at: http://www.seaint.org
> ******* ****** ****** ****** ******* ****** ****** ********
>

******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
* 
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*
*   http://www.seaint.org/sealist1.asp
*
*   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you 
*   send to the list is public domain and may be re-posted 
*   without your permission. Make sure you visit our web 
*   site at: http://www.seaint.org 
******* ****** ****** ****** ******* ****** ****** ********