Gamolon
Active Member
Mick,
Do you suppose you could use your model (https://www.metabunk.org/towards-a-...-the-collapse-of-the-wtc-towers-on-9-11.t7396) for the Heiwa challenge located here?:
http://heiwaco.tripod.com/chall1.htm#hc
Do you suppose you could use your model (https://www.metabunk.org/towards-a-...-the-collapse-of-the-wtc-towers-on-9-11.t7396) for the Heiwa challenge located here?:
http://heiwaco.tripod.com/chall1.htm#hc
External Quote:
Conditions:
1. The structure volume is supposed to have a certain uniform cross area (meter²) and height h (meter) and is fixed on the ground. The structure consists of an assembly of various connected elements inside the volume, e.g. columns (wall elements), beams (floor elements), brackets (to connect columns and beams), plates, etc, of any type or material joined together. It can be any size! The structure volume contains mostly air, of course. It can but need not look like the structure left (developed by NASA engineer Mackey)! It is VERY simple; 111 units of a horizontal beam/platform with mass m supported by/connected to two (or four ?) pillars (total 3 or 5 elements per unit) stacked/joined on top of each other (+ a mast on top). It looks like WTC1!! It also looks like a house of cardsbut note that the horizontal and vertical elements are connected with solid joints, so use weak supporting, vertical elements of fragile material (and more solid, heavy horizontal ones).
2. The structure should be more or less identical from height = 0 (ground) to height = H (top), e.g. uniform density, layout of internal elements, weights and joints, etc. Horizontal elements in structure should be identical. Vertical, load carrying elements should be similar and be uniformly stressed due to gravity, i.e. bottom vertical elements should be reinforced or made a little stronger, as required. Connections between similar elements should be similar throughout. In example left H = 111 h, where h is height of one unit.
3. The structure should be uniformly stressed at height=0 and height = H. It means that supporting elements are stronger at height=0.
4. Before drop test (see 8.) the structure shall be stable, i.e. carry itself and withstand a small lateral impact at top without falling apart and to deflect elastically sideways less than H/100 at the top. Connections orjoints between elements cannot rely solely on friction.
5. Before drop test top 1/10th of the structure is disconnected at the top at height = 0.9 H without damaging the structure/elements/joints more than required for disconnection.
6. The lower structure, 0.9 H high is then called part A. The top part, 0.1 H high, is called part C.
7. Mass of part C should be <1/9th of mass of part A.
8. Now drop part C on part A and crush bottom part A of structure into smaller pieces by top part C of the structure (if you can! That's the test). Film the test on video!
9. Drop height of part C above part A is max 3.7 meter. Less drop height is permitted. Thus the maximum energy (Joule) applied at collision C/A to initiate the crush-down progressive collapse is mass of C times gravity acceleration 9.82 m/sec² (i.e. the force acting onC) times height 3.7 m (i.e. distance the force is displaced).
10. Structure is only considered crushed, when >70% of the elements in part A are disconnected from each other at the joints or broken between joints after test, i.e. drop by part C on A from 3.7 m. Try to use elements and/or joints not producing smoke/dust at failures, so we can see the crush down action and failures of elements/joints on video. If all supporting, vertical elements are broken in part A of structure left, then 66.66% of all elements are broken, etc, etc.
Have a try! I look forward to your structures and videos!
Once you have a clear idea of how the structure should fall, it's time to prepare the structure. The first step in preparation is to clear any loose items out of the structure. The second step is to remove all non-load-bearing elements within the structure. This makes for a cleaner break of elements and joints at every level. If these elements were left intact, they would stiffen the structure, hindering its collapse. You should also weaken the supporting elements and their joints, so that they give way more easily.
The first person describing a structure fulfilling conditions 1-10 above and doing a successful drop test wins Euro 1 000 000:-.
Terrorists, Holocaust deniers (and demolition companies) are also welcome to participate in order to confirm their actions/ideas/services!
Send your entry (description of structure + verified result of test/video) to Anders Björkman, 6 rue Victor Hugo, F 06 240 Beausoleil, France, anders.bjorkman@wanadoo.fr
Money is evidently available in the bank and is paid by bank transfer.
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