I have bent that is being constructed in two phases so some shrinkage will happen on the first phase before the next phase is constructed. In the final condition, I could assume the entire shrinkage strain is applied to both sections but that will be very conservative. Is there a way to differentiate the strains in the final model?
I also noticed that the shrinkage strain causes tension in the bent cap but the moment capacity is not reduced based on a P-M diagram. Is this correct? If so, why is this not accounted for?
Thanks,
Will
Currently there is no option in the program to differentiate the strains in the final model.
I would suggest to input average Shrinkage Strain value so that it won't b be conservative and you should be able to check the forces and reactions in the Analysis TAB to make it is within limits.
Currently LEAP Concrete does not design the column in tension and also the program does not show anythingin the interaction diagram for a column in tension.
As per the RCpier user manual.Only the axial force and moments in the global X and Z-direction are used for the column design. A momentinteraction diagram is constructed for each combination. The capacity of a column is determined by the methoddescribed on page HC-17 from RCpier Tutorial Manual.
Tutorial Manual is available in this path C:\Program Files\Bentley\LEAP Bridge Concrete CE V21\Help\US
For additional information related to Creep and shrinkage please check the Bentley Communities link.
https://communities.bentley.com/products/bridge_design___engineering/w/bridge_design_and_engineering__wiki/15681/creep-and-shrinkage-values
Answer Verified By: William Shekarchi
Thank you, Vinay. Your contributions to the community are greatly appreciated.
Mark
You are welcome