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SAP2000 shrinkage test

SAP2000 shrinkage test

SAP2000 shrinkage test


I am trying to check SAP2000 calculations for time dependent effects. Specifically I want to match some numbers of shrinkage.
My test structure is a frame 1 m lentgh and a section of 1.0m by 1.0m. The material is the default 4000Psi concrete. The shrink model is the MC90 with a humidity of 60%, a shrinkage coefficient Bsc=5 and a shrinkage start Age 0 days.
If I click on the Show plot and I introduce a shape factor of 0.5 (which is what I have with my test structure) I am getting 5.582E-5 as expected by hand calculation for shrinkage at 100 days.
However if I implement a non-linear stage construction analysis with a stage of 100 days I get a displacement of 5.048E-5 which does not match the previous number.

Is there anything I am missing for the calculation not being exactly the same?
The file is attached.

PS I tried to apply a strain to the bar and I obviously get a deformation equal to the strain, being the member 1 meter length. Therefore, the response of the member to a strain is correct as expected.

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