Autogenous shrinkage and maturity concept

[awolfgang]

Hello,


I want to introduce autogenous shrinkage data into a finite element model to determine stresses.

I have experimental data for the shrinkage as a function of time. But I cannot feed this information directly into the finite element model because shrinkage is actually a function of temperature or degree of hydration, which can change in the finite element domain depending on initial and boundary conditions of temperature.

I understand that one could convert shrinkage as a function of time to shrinkage as a function of so called maturity, which in turn is a function of temperature and time. Could any of the concrete modellers explain to me how I can do this conversion.

Thanks a lot for your help.


Wolfgang

 

[structE1973]

i would first calculate the equivalent uniform temperature change, considering all factors and parameters according to the regulation you are using, and then load the finite elements directly with a thermal load. I use to ignore the time-dependent load for such cases.


Structural Engineer, PhD
Structural engineering software