A bridge too far
When I studied Civ Eng as a precursor for my subsequent career in IT nearly the first thing we were shown was the Tacoma Narrows bridge failure - it's an absolute classic. We were also told how soldiers (probably apocryphal) might break step when marching over a bridge. We had resonance explained in nauseating detail.
So they only seemed to have done wind tests, a slack handful of basic loading calcs, a static finite element analysis with pretty graphics and forgot rule 1(b). 1(a) is the wind is what'll shake it down, (b) is something else and there are lots of known somethings already and one of them is people - the primary purpose for a foot bridge!
Biting the hand that feeds IT
