I am a final year student trying to study the behaviour of segmental columns subjected to biaxial cyclic loadings using Abaqus but am having some issues.
When I apply uniaxial cyclic loading it is fine and runs properly with correct results. However, when I try to apply biaxial cyclic loadings, I get some problems. Either the job doesn't run due to errors, or the results (hysteretic curves) look funny.
For the uniaxial loading I simply add a reference point near the loading block, apply a coupling constraint to the loading block face and reference point, and then apply the cyclic load amplitudes to the reference point as a boundary condition.
I have tried a few things for the biaxial loading, but none seem to work properly. I tried:
These are shown in the image attached below. Nothing seems to give me the correct results and I am unsure of how I should proceed. Does anyone have any suggestions or experience with something similar? Thank you!
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