Neddy Bate
Valued Senior Member
I decided to build my own model using physics software. I am using a free program called Physion which is pretty cool, and very fun to play with.
First I built a tower with no joint connections at all. This "house of cards" model does provide the desired type of collapse, but it does not stand on its own. Even before I could add some damage to represent the plane impact and fires, the building just collapsed due to its own gentle oscillations. If the WTC1 and WTC2 had been designed like this, they would have collapsed in the 1970's or before they were even completed.
Figure 1. The tower with no joint connections, perfectly intact, (before collapse).
______________________________________________________________________________________________________________________________
Figure 2. The tower with no joint connections, (during collapse).
______________________________________________________________________________________________________________________________
Next I added joint connections which would allow the building to stand on its own. Those connections are like strings tying the individual blocks together. The strings don't break, but they do stretch a little, and they are long enough to allow the columns and floors to move far enough apart to allow collapse. I also cut some of the strings when I add some damage to represent the plane impact and fires.
Figure 3. The tower with joint connections and some damage to represent the plane impact and fires, (before collapse).
______________________________________________________________________________________________________________________________
Figure 4. The tower with joint connections and some damage to represent the plane impact and fires. Low and behold, it does not collapse! The damaged top section fell onto the remaining bottom section, and stopped there.
______________________________________________________________________________________________________________________________
Figure 5. Let's try it again, this time with more damage. That is the tower with joint connections and plenty of damage to represent the plane impact and fires, (before collapse).
______________________________________________________________________________________________________________________________
Figure 6. LOL!! The damaged top section fell off the remaining bottom section. Nothing like what happened on 9-11. LOL!!! Well, I can't say I'm surprised. And before you complain that those joint connections are too strong, bear in mind that I tried using smaller joint connections, but the building would not stand on its own, (it would keel over to the side). I'll try building it taller until it barely stands on its own.
First I built a tower with no joint connections at all. This "house of cards" model does provide the desired type of collapse, but it does not stand on its own. Even before I could add some damage to represent the plane impact and fires, the building just collapsed due to its own gentle oscillations. If the WTC1 and WTC2 had been designed like this, they would have collapsed in the 1970's or before they were even completed.
Figure 1. The tower with no joint connections, perfectly intact, (before collapse).
______________________________________________________________________________________________________________________________
Figure 2. The tower with no joint connections, (during collapse).
______________________________________________________________________________________________________________________________
Next I added joint connections which would allow the building to stand on its own. Those connections are like strings tying the individual blocks together. The strings don't break, but they do stretch a little, and they are long enough to allow the columns and floors to move far enough apart to allow collapse. I also cut some of the strings when I add some damage to represent the plane impact and fires.
Figure 3. The tower with joint connections and some damage to represent the plane impact and fires, (before collapse).
______________________________________________________________________________________________________________________________
Figure 4. The tower with joint connections and some damage to represent the plane impact and fires. Low and behold, it does not collapse! The damaged top section fell onto the remaining bottom section, and stopped there.
______________________________________________________________________________________________________________________________
Figure 5. Let's try it again, this time with more damage. That is the tower with joint connections and plenty of damage to represent the plane impact and fires, (before collapse).
______________________________________________________________________________________________________________________________
Figure 6. LOL!! The damaged top section fell off the remaining bottom section. Nothing like what happened on 9-11. LOL!!! Well, I can't say I'm surprised. And before you complain that those joint connections are too strong, bear in mind that I tried using smaller joint connections, but the building would not stand on its own, (it would keel over to the side). I'll try building it taller until it barely stands on its own.