Revit Structure
COMPLEX ADJUSTMENTS ANALYTICAL EDIT MODE The analytical edit mode is activated when you toggle the “adjust analytical” command. The analytical edit mode has some features that are helpful when adjusting the analytical and, ultimately, the physical model. You are allowed to add dimensions that only exist in the analytical edit mode. As mentioned earlier, the analytical node is only available in the analytical edit mode. This is helpful when adjusting the physical model to the analytical model for complex geometry. UNIQUE CHARACTERISTICS OF THE ANALYTICAL NODE Now that the basics of how to use the analytical model to adjust the physical model have been presented, it’s time to examine how to use these new tools for more complicated structures. The analytical node shown in Figure 1 has some very powerful and unique characteristics. The analytical node has pull handles; in global coordinates that can be adjusted easily, as shown in Figure 6.
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Figure 8: Hosted analytical node location relative to host curve/analytical beam.
A COMPLEX ADJUSTMENT Let’s use what we just learned and what was illustrated in Figures 7 and 8 on a real example. Consider the following girders in Figure 9.
Figure 6: The adjustment handles on the analytical node.
Also, analytical nodes can be hosted onto other elements including analytical beams. A hosted node will appear as a small sphere while a non-hosted node will appear as a large sphere as shown in Figure 7. Contrast this with the end of a physical beam. There is no way to tell by looking at the end of a physical beam if it is hosted to its supporting girder.
Figure 9: Curved girder framing example.
If, for example, you wanted to place three physical beams at the ¼ points of a curved girder that was made up of a spline curve, how would you do it with only the physical model? You could cut sections at each location in plan along the ¼ points, but this would not be accurate and it would be very time consuming. The better solution is to use the “adjust analytical” command. Follow the steps below for the solution.
Figure 7: Hosted and non-hosted analytical node.
Another unique characteristic of an analytical node is the ability to set the hosted node’s location based on a relative location along a hosted curve as shown in Figure 8. It is not possible to do this with the end of a physical beam. In the example in Figure 8, the node/ end of the analytical beam is half the distance from the end of the analytical girder. September 2011
Draw the three physical beams in plan. Make sure to start and end each beam on the curved and straight girders as shown in Figure 9. Turn on the analytical model line and click “adjust analytical.” Select the analytical nodes of each beam and select the “pick new host” command as shown in Figure 10.
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