Tacoma-Narrows Bridge Construction & Collapse 1940 4min
Posted by James on August 3, 2014 · 8 Comments
more at http://quickfound.net/ Silent. Public domain film from the Library of Congress Prelinger Archive, slightly cropped to remove uneven edges, with the a…
Video Rating: 4 / 5
This happened at a time when engineers had no computers to simulate every
possible case of force that would occur. And the tecnique of suspension
bridges was very new, too. No one could possibly have known that a
rectangular cross section of exactly these proportions, combined with
exactly this length and a strong wind from this direction would lead to
such a resonance. NOW we know…
Harmonic resonance and its most destructive. Video almost doesn’t look real
There is only ONE reason that this wind generated resonance happened,,,
because of cable suspension! if you think about the way cable suspension
works,, it’s GRAVITY ALONE, that supports the bridge in place with the
cables as the support means! But,,, what about UPWARD FORCES??? Such as
aerodynamic lift, caused by the strong wind currents? Ah!! No one thought
about the fact that there wasn’t any bracing to prevent upward lift, or
wind generated lift and resonation/wobble! That’s all folks!!!
It is such an incredible situation. Building a bridge like that requires
very hard and sharply accurate calculus.
Yeah well,i still not quite sure about those engineers,when someone give
you a task this big,you need to think on the safety of them first more than
anything.
Decent engineers could do one with no problem,but the ones in this
bridge,they just suck.
The Ninian Central Platform is going to break up in a storm one day. I hope
the workers aren’t on board when it happens. I hope the million barrel
capacity storage cells in the base are empty and the pipelines aren’t
flowing. I live in hope.