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New slats make the Golden Gate Bridge sound like a David Lynch movie

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Re: New slats make the Golden Gate Bridge sound like a David Lynch movie

#11
post #4

Worse mistakes have been made https://en.m.wikipedia.org/wiki/Tacoma_Narrows_Bridge_(1940) Pretty sure every bridge engineer knows that one. Amusing that the lesson didn't generalize.

Also London's "Wobbly Bridge", which closed after its first day due to resonance that caused severe swaying. Two years of remedial work, installing dozens of energy-absorbing dampeners, solved the problem.

https://en.wikipedia.org/wiki/Millennium_Bridge,_London

Re: New slats make the Golden Gate Bridge sound like a David Lynch movie

#12
post #4

Worse mistakes have been made https://en.m.wikipedia.org/wiki/Tacoma_Narrows_Bridge_(1940) Pretty sure every bridge engineer knows that one. Amusing that the lesson didn't generalize.

Every engineer, not just the ones building bridges. I was required to take an Engineering Ethics course that covered Tacoma Narrows as well as other incidents, such as the famous Hyatt Regency walkway.

I second that. As a mechanical engineer, we needed to learn about public works and prior disasters that has happened when there is lack of rigor or otherwise oversight, including Tacoma bridge and Hyatt Regency walkway.

Re: New slats make the Golden Gate Bridge sound like a David Lynch movie

#13

This sounds so beautiful and desolate, reminding me of a combination of the first two tracks from Aphex Twin's Selected Ambient Works Vol 2, disc 2, in particular "Blue Calx" and "Parallel Stripes" starting from 40 seconds. [0] Thank you for sharing. [0] https://www.youtube.com/watch?v=FXBAU8HsAqk

I don't think SF residents are as thrilled. It's overwhelmingly loud.

Re: New slats make the Golden Gate Bridge sound like a David Lynch movie

#14
I'm just glad they identified the source of the hum, many people are impacted for years by unexplainable sounds, and it is maddening.

It took me and my neighbours a month to find the source of a hum that was resonating with our windows. It was torture, with midnight walks and lurking around potential sources, mapping nearby industrial sites, and questioning our sanity, while our windows were vibrating without a stop. We were very lucky to track it down to a badly installed air conditioning vent 200 m away.

https://en.wikipedia.org/wiki/The_Hum

Re: New slats make the Golden Gate Bridge sound like a David Lynch movie

#15

This sounds so beautiful and desolate, reminding me of a combination of the first two tracks from Aphex Twin's Selected Ambient Works Vol 2, disc 2, in particular "Blue Calx" and "Parallel Stripes" starting from 40 seconds. [0] Thank you for sharing. [0] https://www.youtube.com/watch?v=FXBAU8HsAqk

[deleted]

Re: New slats make the Golden Gate Bridge sound like a David Lynch movie

#16
Lisbon also has a bridge that you can hear from miles away: one lane in each direction has a surface made of metal grating which makes a loud hum when cars drive over it.

People who live nearby don't notice it (strange looks if you point it out) but I think it's sad that it's impossible to escape the constant noise in certain places.

Re: New slats make the Golden Gate Bridge sound like a David Lynch movie

#19
this is fascinating! i wonder how long it will take them to do something about it? seeing the video, i almost wish they'd keep it, but i don't live nearby, so...

i found a couple more video examples of accidental acoustic wind effects in architecture -- but it looks like these aren't as ever-present and loud as the Golden Gate Bridge is right now.

Beetham Tower - Manchester, UK: https://www.youtube.com/watch?v=Y8-MrU6lpwg

Freedom Tower - NYC, USA: https://www.youtube.com/watch?time_continue=25&v=nkjA3BvvOuw

in the Beetham Tower case, apparently the architect lives in the tower's penthouse. i bet they're frustrated that none of the fixes have completely remedied the problem.

links from: https://gizmodo.com/when-buildings-howl-a-primer-on-architec...

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