Simulations in Sketchup

My students are building bridges and cranes in sketchup and we would like to do stress/destruction testing on them. Is there a function, extension, or compatible online program to accomplish this? We are using Mac Airs if that makes a difference.

Two come to mind:

  1. SketchyPhysicsWiki | Fandom - but I don’t know the status of that on Mac.
  2. At Trimble Dimensions this month in Las Vegas, we saw a group in Trimble that handles Construction Corridor modeling that uses models from 3dwarehouse with Civil projects: http://www.trimble.com/alignment/