"Importing a dxf file into LimitState:GEO does not produce a model but I can open the file in other programs. Are there any restrictions on what I can import?"
Yes - there are restrictions on the object types that you can import in a DXF. Detailed guidance is given in the LimitState:GEO User Manual.
You may also find the following tips for preparing your DXF files useful:
Tips for preparing DXF files
- You should isolate the area that you are interested in analysing.
- LimitState:GEO looks for closed loops of lines with which to create solid objects - therefore all intersections, corners etc. should be checked to make sure that lines really do meet, rather than just appear to meet.
- The drawing should be 2D and simplified as much as possible.
- LimitState:GEO works in metres, so the DXF file should also be in metres (tip - check that $insunits, if present, is set to 6).
- The importer works best if the dxf consists of lines / polylines. Curves and circles are not recognised and should be substituted with straight-line alternatives.
- It is best to remove any lines that are entirely overlapping each other).
- All text / hatching / unused layers should be removed from the file.
- An appropriate point (normally the bottom left corner of the domain or nearby) should be set to (0,0).
- Finally, it is a good idea to 'explode' the drawing just before saving.