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Old June 4th, 2015, 06:19 PM   #16201
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Quote:
Originally Posted by Sukaitsuri View Post
Sorry if I'm going to be a bit off-topic here,

I'm wondering about something, I would like to know if it is possible to build a skyscraper without any core in the middle?? (concrete core or steel core)

What am I talking about? -> a surprising example:

in Tokyo, mostly in East Tokyo, there are full of residential skyscrapers with some kind of big hole in the middle of the structure. I enclosed here some pictures to show you.
On this pictures (from Google Earth, sorry for the bad quality) you can clearly see some skyscrapers that seem to have no core at all. I'm not sure about that but it really seems. The middle is hollow.

I entered one of these skyscrapers before, and yeah I was totally surprised when I saw this big hole inside, I never saw something like that before.

As far as I know about skyscrapers, I think there are no other places on Earth with such hollow buildings.
The reason may be that the structure of these buildings is especially designed for earthquake resistance, but actually I don't know at all...

By the way, most of these buildings showed on the pictures have a height of around 200 meters. Like most of Tokyo's skyscrapers.




you can use an exoskeletal structure.

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Old June 4th, 2015, 06:31 PM   #16202
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Quote:
Originally Posted by Sukaitsuri View Post
Sorry if I'm going to be a bit off-topic here,

I'm wondering about something, I would like to know if it is possible to build a skyscraper without any core in the middle?? (concrete core or steel core
First of all - and as other posters already responded - the core is not necessarily in the middle of the building envelope/footprint. Locating the core in the middle makes more sense for structural reasons (minimize torsion mode and additional stresses generated by eccentricity of lateral loading) and architectural reasons (maximizes occupation on periphery where windows are located). The buildings mentioned in your post probably all have one or even several cores (likely under the helipad/mechanical rooms which are visible at roof level).

Structurally speaking, it would be possible to design a building with no core or a reduced/light core. This could be done in a number of ways but the most "popular" would be relying on a moment frame (or braced frame) on the periphery of the building ("tube" or exo-skeletal structure) as the lateral load main resisting system. This is similar to what was done for the twin towers of the World Trade Center in New York (though there was a core, but very minor for that kind of tower). This could also be done by using a combination of shear walls which would not necessarily form a core.

However in "modern" construction, some of the main advantages of using a core are that the core is a natural place to fit the elevator banks and stairs, and it also provides a "natural" fire escape route (especially for a concrete core as the thickness of the walls would naturally provide a 2-hour fire resistance), not to mention the vertical alignment required for most of the MEP distribution systems.
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Old June 4th, 2015, 08:03 PM   #16203
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Moon and New York City by jaycohen13, on Flickr
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Old June 4th, 2015, 08:37 PM   #16204
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That's a lovely shot but I'm calling Photoshop. That moon is simply too big, IMO. Given its place on the horizon I'd also expect some color gradation between the top and bottom.
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Old June 4th, 2015, 08:38 PM   #16205
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Quote:
Originally Posted by GunnerJacket View Post
That's a lovely shot but I'm calling Photoshop. That moon is simply too big, IMO. Given its place on the horizon I'd also expect some color gradation between the top and bottom.
Maybe it's just perspective?
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Old June 4th, 2015, 08:45 PM   #16206
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Originally Posted by Miami High Rise View Post
What I meant was that they don't look like your no-bullcrap let's get it done construction crew. They look like they were selected to be photogenic and that they are certainly not sweating on this job since it is not everyday. These look like some official photos and they're not going to show people actually working very hard. In Miami you would never see such a hodge podge collection of happy looking blue collar workers.
just say what you want to say. white people cant build things?
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Old June 4th, 2015, 09:02 PM   #16207
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just say what you want to say. white people cant build things?
Are we talking Lego or Ikea?
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Old June 5th, 2015, 04:05 AM   #16208
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Quote:
Originally Posted by GunnerJacket View Post
That's a lovely shot but I'm calling Photoshop. That moon is simply too big, IMO. Given its place on the horizon I'd also expect some color gradation between the top and bottom.
Ever heard of a "harvest moon?"
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Old June 5th, 2015, 04:54 AM   #16209
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At certain times, the moon just looks that huge! It has something to do with the moisture in the air magnifying it at a low altitude. It is a very short term effect.
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Old June 5th, 2015, 04:56 AM   #16210
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Quote:
Originally Posted by towerpower123 View Post
At certain times, the moon just looks that huge! It has something to do with the moisture in the air magnifying it at a low altitude. It is a very short term effect.
The moon looks huge because the shot is taken through a zoom kind of like a telescope.
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Old June 5th, 2015, 05:00 AM   #16211
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No, I'd witnessed the moon with my very own eyes!! Even bigger.
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Old June 5th, 2015, 05:16 AM   #16212
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The moon can look big near the horizon but in this case Jay is right. Just look at the Statue of Liberty, ESB, and 432 Park. They look as if they are right next to each other even thought they are 4 to 5 miles apart. The camera has a telescopic lens on it, and it is that that is making the moon look so big. Its the same as looking at the moon through a telescope.

Here's how it works, example at 1:40

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Old June 5th, 2015, 05:27 AM   #16213
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I agree, it could be a camera trick, but I have at times in the city have witnessed the moon being that huge with my non telescopic eyes.
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Last edited by Vertical_Gotham; June 5th, 2015 at 06:12 AM.
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Old June 5th, 2015, 01:33 PM   #16214
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it totally ruined the skyline...
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Last edited by Filipe_Teixeira; June 5th, 2015 at 01:38 PM.
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Old June 5th, 2015, 03:55 PM   #16215
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Quote:
Originally Posted by Sukaitsuri View Post

I'm wondering about something, I would like to know if it is possible to build a skyscraper without any core in the middle?? (concrete core or steel core)

Well the old World Trade Center in New York had a special building type too. External facade columns carried the building instead of columns. Because of that, the view out of the tower was not interrupted by walls or columns. In the profile of the building, you can see, that there has not been a real core. The picture underlines it.



Construction of the WTC. You can see, that the facade is higher than the constructed floors, because it conduces as columns.
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Old June 5th, 2015, 04:12 PM   #16216
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Very slim, impressive shape, i like it!
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Old June 5th, 2015, 06:22 PM   #16217
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Quote:
Originally Posted by Filipe_Teixeira View Post
it totally ruined the skyline...
Yeah, just like the Empire State Building and original World Trade Center did.
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Old June 6th, 2015, 01:42 AM   #16218
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I did not post updates for a couple of months, so here they are, in order:





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Old June 6th, 2015, 02:05 AM   #16219
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Although the design of the building is of course quite different, it's aesthetics nonetheless remind me very much of the original WTC towers.
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Old June 6th, 2015, 03:51 AM   #16220
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Although the design of the building is of course quite different, it's aesthetics nonetheless remind me very much of the original WTC towers.
Although they share the same boxy idea the 432 is wayyyy better than the old WTC towers
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