On Aug 2, 5:25 pm, oldcoot <oldcoot7...@sbcglobal.net> wrote:
On Aug 2, 2:08 pm, Double-A <double...@hush.ai> wrote:
The Bible story of Jericho fits. The army stomped around the city...
and the walls came a tumbling down!
Sympathetic vibrations.
Even today, soldiers on a march are trained to break step when
crossing a bridge.
This has caused the actual collapse of a bridge when and where?
Wind can also drive sympathetic resonance in
bridges, as in the famous collapse of the Tacoma Narrows bridge
('Galloping Gertie'). oc
Wind can pack enough energy to overcome a structure's damping
ability. Human footsteps don't even come close.
.
