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Cement Barrier test

Blee1099

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How many times have you wondered how strong those cement barriers are that you see in front of military base entrances. From time to time someone asks me what the concrete barriers are in front of controlled and secure buildings. When I tell them that the barriers will stop traffic, even trucks, from approaching the secure building I usually get a look of disbelief. I've been looking for some footage like this to prove my point. In this test, the following parameters were used.

Truck = 65,000 lbs

Speed = 50 mph

Kinetic Energy = 5.5 MILLION ft. lbs

Stopped in 24 inches !!!


http://www.compfused.com/directlink/1323/
 


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chriswells78

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The center barrier of the highway did this to my Taurus @ 60mph....
 

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Explorer#2

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dont know where they got the 5.5 million

Kinetic energy is K = 1/2mv^2
So the kinetic energy of the truck is (.5)(65000)(50^2) = 8.125*10^7

but it still is cool
 




Texplorer

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Geez I wonder how deep those things are anchored.
 




'97 V8

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Explorer#2 said:
dont know where they got the 5.5 million

Kinetic energy is K = 1/2mv^2
So the kinetic energy of the truck is (.5)(65000)(50^2) = 8.125*10^7

but it still is cool


:D haha. nice to know someone who knows how it all works.

but damn that had to hurt. Seriously would put a hamper on your day.
 




IZwack

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Explorer#2 said:
dont know where they got the 5.5 million

Kinetic energy is K = 1/2mv^2
So the kinetic energy of the truck is (.5)(65000)(50^2) = 8.125*10^7

but it still is cool

u cant really plug in those numbers into that equation cauz the units kinda dont match up

because SI is ten times better than the english unit, lets convert:
65,000 lbs = 29,483 kg
50 mph = 22.35 m/s

pluggin in, we get :
0.5 * m * v^2
0.5 * 29,483 * (22.352^2)

this equals 7,365,153 kg*(m/s)^2
which is the same thing as saying 7,365,153 N*m ...

going back to the english unit, we need to divide this number by 1.356 because:
1 ft*lb = 1.356 N*m

so..
7,365,153 / 1.356 about equals 5.5 million ft*lbs
 




'97 V8

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:eek: :eek:

i should have payed more attention in highschool
 








DeRocha

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Very impressive indeed :eek:
 




Joey P

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That was awesome!! I won't be trying to run throuhg one of those any time soon.
 




Ranger379

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wow, those barriers dont look that strong...
 




Blee1099

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You have to consider those barriers are interconnected and I'm sure buried a good bit underground.
 




spindlecone

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They are also rebared and poured with carbon fiber entrained concrete.
Friend of mine makes them.
 




Crankcase

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The suicide driver would not have a chance to say OH SH*T! that didn't work!
 




Paraphoe

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Badass!
 




99stocksport

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thats soo cool
 


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BeauJ

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Nice video, but it would have been better if a dummy was involved just to show what kind of damage it would do to a human body :D
 




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