I agree with IRstuff about looking at the PTC site. At this time, the largest number of civil worksheets there are for structural. A couple weeks ago I found the personal website of a retired civil engineering professor and it contains dozens of Mathcad worksheets, but I'll be darned if I can find it right now. When I find it, I will post the link. You might find it first with a clever Google search.
BTW, I just uploaded two relatively simple MC Prime 3.0 worksheets to the PTC site last night. One is for finding the area of a boundary by coordinates and the other is for finding the center and radius of a circle that passes through three points. These tasks are now trivial with CAD software, but I think it's a good thing to document the mathematics behind the solutions. I am working on additional worksheets that I post to the PTC site, including pumping stations, hydrology, a little structural, etc.
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"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill