When you use Tekla Structural Designer as the analysis application, and you have analyzed, designed, and modified a model in Tekla Structural Designer, you can import the changes to Tekla Structures.
You can import the new parts created in Tekla Structural Designer, profile and material changes, and analysis results.
The location of existing parts does not change in Tekla Structures even if you have moved the corresponding parts in Tekla Structural Designer.