Introduction Of Heiwa, Planes should not collide with towers Options

[Heiwa]

Hi all. I am Heiwa. Naval architect. Designing ships since 40 years. Quite complex! Lots of forces acting on a ship structure in the interface water/air affecting strength, buoyancy and stability. Like planes. Structures fixed on land are easier to design. Take a tower/skyscraper:

A tower/skyscraper structure consists generally of load carrying elements of only two types, i.e. vertical steel columns and horizontal composite steel/concrete floor panels, all joined together one way or another, e.g. by bolts.

The vertical elements, the columns, joined on top of each other are primary structural elements that transmit their loads down to ground.

The horizontal elements, the floor panels, placed between and connected to the columns are secondary structural elements that transmit their loads to the columns.

And that’s it. Nothing magic at all! Not like a ship or a plane.

If a skyscraper has 110 floors, like WTC, there are thus 110 assemblies of horizontal floor panels all connected to the vertical columns. Evidently the columns between ground and the first floor are designed to carry 110 floors and the columns below the top floor (or roof) are designed to carry just one floor (or the roof).

It means that the lowermost columns of a tower structure are 110 times stronger than the topmost columns.

Airplane pilots are highly recommended not to fly their planes into towers/skyscrapers, as the vertical and horizontal elements of the towers/skyscrapers will slice/shred the plane into small pieces. Evidently the plane will cause some local damage to the structural elements of the tower or skyscraper … but that’'s it.

Anyone believing that flying planes into the weak tops of skyscrapers will destroy or crush the strong bottom parts of same towers should read my scientific paper at http://heiwaco.tripod.com/tower.htm . I am happy to inform that you can in fact fly as many planes you like into the tops of skyscrapers and nothing will happen to skyscraper below impact. The plane's pilot will evidently get smashed.

If you belong to a terrorist organization and plan a flying attack anywhere you should thus avoid flying planes sideways into the weak tops of skyscrapers as you will only produce local failures up in the weak top and kill yourself. Better is to hit the bottoms or Stuka style vertically through the roof. But you will still kill yourself.

I have informed the FBI and CIA about the above and they, Pearl Harbour style, informed that couldn’t care less, I was sorry to hear. They apparently have great difficulties in Afghanistan forgetting the home front. Well, do not blame me.

This post has been edited by Heiwa: Nov 5 2011, 01:38 PM

[SanderO]

Anders,

Bazant has been shown to be wrong... The floors were overwhelmed when the top section collapsed on to them... the columns broke at the joints which were much weaker than the cross sections themselves. Most of the core columns up to the 50th floor survived the floor collapse.. so obviously they didn't resist it. The core column fractured... but at their joints and many experienced Euler buckling.

Your conception is reductionist.. mickey mouse and doesn't match the observables.

Stick to ships...

[Heiwa]

The floors were overwhelmed when the top section collapsed on to them...

But the weak top section consisted of what? Floors? OK, so top section floors overwhelmed the bottom section floors ... and the walls just fell off? Great!
Pls describe the structure with floors in more detail and test it in a laboratory - top section floors overwhelming bottom section floors - and walls just falling off. It sounds like pancaking? If it works € € 1000000:- are yours! Come on, O!

This post has been edited by Heiwa: Nov 11 2011, 10:57 PM

[elreb]

Come on, O!

Heiwa,

I would estimate that 90% of this forum is behind you.

Anyone with a 4th grade education would recognize that the buildings were brought down from the bottom-up.

The planes were nothing more than a distraction…

Why wastes your time…

[DoYouEverWonder]

Heiwa,

I would estimate that 90% of this forum is behind you.

Anyone with a 4th grade education would recognize that the buildings were brought down from the bottom-up.

The planes were nothing more than a distraction…

Why wastes your time…

Actually, it wasn't just a bottom-up CD. These were the tallest buildings and the Towers had structural features that were exploited. The Towers were like three cubes one on top of the other. The destruction of the top cube was initiated first, then the bottom cube and then middle one. In the top cube was the hat truss that held the core together. Once the hat trusses were blown up, fuel air explosives in the elevator shafts would force the core columns out like peeling a banana.

They even controlled the direction of the collapses and both buildings were tilted to fall into the plaza. Made it a lot easier to clear the perimeter streets, which were mostly reopened in a day or two.