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FIU had grand plans for 'signature' bridge. But the design had a key mistake

miamiherald.com

51–60 of 153 posts

Re: FIU had grand plans for 'signature' bridge. But the design had a key mistake

#51

> And in order to pull off the aesthetic, the bridge's designers had to make the diagonal supports beneath them a variety of different shapes and sizes. That complication may have led the designers to miss a crucial error, independent engineers who've examined the bridge's plans believe: One of the supports was not strong enough. They aren't joking about the "variety of different shapes and sizes" for the diagonal su…

>It's a false claim to structural integrity.

That's not how engineering works at all. Structures are either safe for the conditions or not.

They don't have features that the public derives safety ratings for because that's impossible for the public to do under any kind of complex forces.

A cable from a bridge doesn't mean anything about it's safety or support. It's nothing like the airbag example.

Re: FIU had grand plans for 'signature' bridge. But the design had a key mistake

#52

> And in order to pull off the aesthetic, the bridge's designers had to make the diagonal supports beneath them a variety of different shapes and sizes. That complication may have led the designers to miss a crucial error, independent engineers who've examined the bridge's plans believe: One of the supports was not strong enough. They aren't joking about the "variety of different shapes and sizes" for the diagonal su…

> It's a false claim to structural integrity.

That's a weird claim to make. False claim to who? Joe on the street?

Re: FIU had grand plans for 'signature' bridge. But the design had a key mistake

#53
post #7

There are some parallels with software. Encryption for example. Don't deviate from standard implementations unless you really know what you're doing. And even then, review it and review it again. Preferably by a separate expert.

The parallels do not go very far, unfortunately. When software fails, and kills people, it is rarely investigated. It's development is rarely investigated. When that is done, however, the differences widen even further. There is no degree to which software development can be done incompetently that criminal negligence charges can succeed. We saw this proven within the past decade when some of Toyotas cars engaged in…

I think part of the problem with software is that it's effectively invisible to most people. Most of our software would look like Rube Goldberg Machines if we somehow made it physically manifest, and a lot of the problems would then be pretty obvious even to the proverbial untrained eye.

Re: FIU had grand plans for 'signature' bridge. But the design had a key mistake

#54

So many concrete bridges fail for so many reasons, it's kind of crazy that we keep building them. It's much easier to inspect and repair steel than concrete, and it fails more gracefully. Also, I'm not even an engineer and I can tell you that uneven strut design would give you uneven loading on the span. Christ. Why didn't they just build a damn cable stayed bridge?! If traffic was a concern, they could have built it…

> I can tell you that uneven strut design would give you uneven loading on the span

A structural engineer is quoted in the article that this uneven strut design would have worked if if that end beam was more solid.

Re: FIU had grand plans for 'signature' bridge. But the design had a key mistake

#55
post #39

Earlier quoted context omitted.

This isn't the only example of that. Imitating an archaic form of architecture is often a homage. Go to some modern temples/shrines in Japan. Check out the torii gates and any other classical looking structure. Compare the ones in wood to the ones in stone or concrete. They look identical. If you look close, you'll notice the little details sticking out of parts of the design. It's almost always a part of Japanese wo…

Is the goal to make beautiful structures, or is it to make beautiful structures as if they still have the characteristics of wood? I’m inclined to believe that, if the original masterful wood-crafters had instead began their professions with stone, that they would have created beautiful structures that fully explored the capabilities of stone, and that their contributions to architecture may have looked a little diff…

I have a good deal of agreement with you, but the architectural (as opposed to engineering) crime that bugs me the most is an egoistic new structure that makes no attempt to work with its surroundings, when its surroundings have merit in their own right.

Re: FIU had grand plans for 'signature' bridge. But the design had a key mistake

#56
post #3

> But FIU's bridge was designed to mimic the dramatic look of a cable-stayed bridge, where the deck is suspended from cables fanning out from a tall mast. In FIGG's design, though, the "cables" — actually metal pipes — were mostly just for show. The diagonal, v-shaped struts of the truss did the structural work. I've always found it useful to hone in on anything that is done purely for aesthetic reasons. We build a h…

Dan Gelbart on design:

https://www.youtube.com/watch?v=MtxA20Q-Uss&feature=youtu.be...

'If something is 100% functional, it's always beautiful'

Re: FIU had grand plans for 'signature' bridge. But the design had a key mistake

#57
post #56
post #3

> But FIU's bridge was designed to mimic the dramatic look of a cable-stayed bridge, where the deck is suspended from cables fanning out from a tall mast. In FIGG's design, though, the "cables" — actually metal pipes — were mostly just for show. The diagonal, v-shaped struts of the truss did the structural work. I've always found it useful to hone in on anything that is done purely for aesthetic reasons. We build a h…

Dan Gelbart on design: https://www.youtube.com/watch?v=MtxA20Q-Uss&feature=youtu.be... 'If something is 100% functional, it's always beautiful'

All of Dan Gelbart's prototyping videos are pure gold:

https://makezine.com/2015/03/20/18-lessons-smart-prototyping...

Fascinating guy:

https://spie.org/membership/spie-professional-magazine/spie-...

Re: FIU had grand plans for 'signature' bridge. But the design had a key mistake

#58

Earlier quoted context omitted.

Then again the Parthenon has has been around for nearly 2,500 years (finished in 432 BC), and during that time has been considered by people from all over the world one of the most beautiful buildings ever built. What building by modern architects will even be around 500 years from now, much less revered as an example of beautiful architecture?

Saint Mary's Cathedral (in San Francisco) I don't say it's as beautiful as the Parthenon, and it might not last 500 years, but we moderns aren't completely shabby... https://en.wikipedia.org/wiki/Cathedral_of_Saint_Mary_of_the... > Its saddle roof is composed of eight segments of hyperbolic paraboloids, in such a fashion that the bottom horizontal cross section of the roof is a square and the top cross section is a c…

That picture reminded me of a building I saw in Tokyo. Turns out it's also a Saint Mary's Cathedral:

https://goo.gl/maps/R2arUkpaZeD2

The top cross section is also a cross on this one.

Re: FIU had grand plans for 'signature' bridge. But the design had a key mistake

#59
post #39

Earlier quoted context omitted.

This isn't the only example of that. Imitating an archaic form of architecture is often a homage. Go to some modern temples/shrines in Japan. Check out the torii gates and any other classical looking structure. Compare the ones in wood to the ones in stone or concrete. They look identical. If you look close, you'll notice the little details sticking out of parts of the design. It's almost always a part of Japanese wo…

Is the goal to make beautiful structures, or is it to make beautiful structures as if they still have the characteristics of wood? I’m inclined to believe that, if the original masterful wood-crafters had instead began their professions with stone, that they would have created beautiful structures that fully explored the capabilities of stone, and that their contributions to architecture may have looked a little diff…

I agree with you, but only because you seem to have missed the crux (no irony intended) of Ayn Rand's ideology. She hated how even the style of the buildings around her embodied a people and culture she saw as a threat to her vision of the world and wanted to tear down. She would have no "homage" to it at all.

Re: FIU had grand plans for 'signature' bridge. But the design had a key mistake

#60
post #3

> But FIU's bridge was designed to mimic the dramatic look of a cable-stayed bridge, where the deck is suspended from cables fanning out from a tall mast. In FIGG's design, though, the "cables" — actually metal pipes — were mostly just for show. The diagonal, v-shaped struts of the truss did the structural work. I've always found it useful to hone in on anything that is done purely for aesthetic reasons. We build a h…

What was the end solution? I'm super interested to find out!
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