Demolition of Post Tensioned PArking Garages

[fpm55]

I am in the process of developing the procedures to demo 2 post-tensioned parking garages. The first is a complete demolition from roof thru foundations. The second is the demolition of the top 3 floors of an existing 6 story post-tensioned garage. Both garages are constructed with one way post tensioned slabs spanning between post-tensioned beams that span ~60 feet to CIP concrete columns. I have only found an old design guide published by PTI, and an article in Concrete International (CI). Is there any other publications or case histories that I can refer to?

Is there anyone out there that has completed this type of demolition before. The last one I did we shored the entire structure , then cut the tendons with a saw. It was laborous and expensive. I believe CI has the right idea, but I want to know if there is other case history available for review. Thanks for your input.

Frank P. Morabito, PE
President
Morabito Consultants, Inc.
Baltimore, MD 21218-4609
frank@morabitoconsultants.com

 

[Ingenuity]

Frank,

A colleague of mine in your area (Washington DC) very recently was involved with a demo of an unbonded P-T structure.

I shall e-mail you privately with the engineer's details.

HTH

 

[PJ]

You may want to get in touch with ICRI (International Concrete Repair Institiute) at

http://www.icri.org.

Many of the top experts in the field are members and they have the capacity to email items like this to their membership of 1500+.
A standing committee on post-tensioning may have what you need.