That is heavy geometry. If I see right, you've got two different curved shapes, that you've multiplied and rotated. A lot of polygons.
Try to export the two primary shapes, one at a time, and import as two separate objects into Archicad.
Then do the multiplying and rotating in Archicad.
If that gives you problems too, you might try to only import the profiles as 2D lines, and create the shapes from that using the slab tool and save as an object. That would probably give less polygons for archicad to handle, since the surfaces wouldn't be triangulated.
You could also use the profile applied as a complex profile to a wall or a beam and get the same result.
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