PGSplice - No Stress Check for the CIP Concrete Deck?

4 posts / 0 new
Last post
JBE_DHA
PGSplice - No Stress Check for the CIP Concrete Deck?

While the program checks the allowable stresses for the top and bottom of the girder for each stage, I have not seen where the program checks the allowable stresses for the cast-in-place concrete deck. Does the program have this capability? Is this something that is planned to be added to a future version?

Thanks.

Rick Brice
The program does not check

The program does not check allowable stresses in the deck. I cannot find in the LRFD specifications where it calls for a stress limit. Also, I am of the understanding that the compression stress in the deck need not be checked when the section is designed for ultimate moment in the Strength limit states. Of course, I could be wrong on that point. If you have addition information on this topic, I'd appreciate your input.
 
A new version of PGSplice is currently under development. These issues can be resolved in the next version.
 
Rick
 
Richard Brice, PE
Software Applications Engineer
WSDOT Bridge and Structures Office

JBE_DHA
Stress Limits for the Deck Concrete

Thanks Rick for the quick response. I also could not find any specific reference in the LRFD Specs to whether it is required to check the deck slab for the compressive stress limits (only reference to stress limits in the deck is discussed in LRFD 5.14.1.4.6, which states that the deck is not subject to the tensile stress limits for bridges composed of simple span precast girders made continuous).

However the NCHRP Report 517 "Extending Span Ranges of Precast Prestressed Concrete Girders" does note that compressive stress limits at final conditions should be checked for both the girder and deck concrete (Page B2-31). In addition this report contains a design example for a single span spliced 96" deep girder (Example 1), where it states the stages at which the stress limits should be checked for the deck (page D1-49 & D1-50). The example then proceeds to check the stress limits at the top of the deck.

Rick Brice
Thanks for the information. I

Thanks for the information. I am working on a new version of PGSplice and I will add an option for checking the compression in the deck.
 
In the mean time, it is easy enough to do a quick check by hand. PGSplices gives you everything you need except for the actual stress check.
 
Rick

Log in or register to post comments