A computer simulation of the September 11, 2001, attack on the World Trade Center, posted on the Web site YouTube by Purdue University researchers, shows how hijacked planes crashed through the twin towers, stripping fireproofing materials from the steel columns and eventually leading to their collapse.The 3-D animation, part of a Purdue study that took 2½ half years to complete, could help engineers design safer buildings, researchers said.
"When the developers of the World Trade Center first designed the complex, they did take into account of an accidental plane crash," said Christoph Hoffman, one of the study's lead researchers. "The only thing they didn't anticipate is the fire. If the crash impacts the water line, then a fire can burn for a long time."
The simulation was posted on YouTube on June 1, and received more than 2,000 hits in the first hour, Hoffman said. As of Wednesday, it had garnered more than 120,000 views. (Watch video simulation on YouTube of a jet hitting the World Trade Center
)
Researchers decided to post the simulation on the popular Web site because of the animation file's size, which could not be adequately supported by their servers, he said.
The Purdue study offers slightly varying estimates on the internal damage to the towers than the findings of an earlier study, done in 2005 by a government panel. In their report, the National Institute of Standards and Technology issued recommendations to make skyscrapers stronger and make "buildings, occupants and emergency responders safer in future emergencies."
NIST listed 30 recommendations for buildings over 20 stories, including enhanced fireproofing such as coating or painting steel beams with the material -- a more secure application than the spray-on fireproofing inside the twin towers that was dislodged when Boeing 767 airliners crashed into them.
NIST has previously concluded that the dislodging of the fireproofing was a key factor contributing to the collapse of the towers.
NIST also recommended new standards for fire-testing building components, such as steel and reinforced concrete, and installing redundant fire response equipment, such as sprinklers, hoses, and alarms.
http://www.cnn.com/2007/WORLD/americ...rss_topstories
http://www.youtube.com/watch?v=cddIgb1nGJ8&v3
"When the developers of the World Trade Center first designed the complex, they did take into account of an accidental plane crash," said Christoph Hoffman, one of the study's lead researchers. "The only thing they didn't anticipate is the fire. If the crash impacts the water line, then a fire can burn for a long time."
The simulation was posted on YouTube on June 1, and received more than 2,000 hits in the first hour, Hoffman said. As of Wednesday, it had garnered more than 120,000 views. (Watch video simulation on YouTube of a jet hitting the World Trade Center
)Researchers decided to post the simulation on the popular Web site because of the animation file's size, which could not be adequately supported by their servers, he said.
The Purdue study offers slightly varying estimates on the internal damage to the towers than the findings of an earlier study, done in 2005 by a government panel. In their report, the National Institute of Standards and Technology issued recommendations to make skyscrapers stronger and make "buildings, occupants and emergency responders safer in future emergencies."
NIST listed 30 recommendations for buildings over 20 stories, including enhanced fireproofing such as coating or painting steel beams with the material -- a more secure application than the spray-on fireproofing inside the twin towers that was dislodged when Boeing 767 airliners crashed into them.
NIST has previously concluded that the dislodging of the fireproofing was a key factor contributing to the collapse of the towers.
NIST also recommended new standards for fire-testing building components, such as steel and reinforced concrete, and installing redundant fire response equipment, such as sprinklers, hoses, and alarms.
http://www.cnn.com/2007/WORLD/americ...rss_topstories
http://www.youtube.com/watch?v=cddIgb1nGJ8&v3
Pesquisadores da Universidade Purdue criaram uma simulação que usa princípios científicos para estudar, em detalhes, o que provavelmente aconteceu quando um jato comercial se chocou com a torre norte do World Trade Center em 2001. A simulação poderá ser usada para compreender melhor quais elementos no núcleo estruturas do prédio foram afetados, como responderam ao choque inicial da colisão e como a torre caiu em seguida, por conta do incêndio provocado pela queima de um total estimado em 40.000 litros de combustível de avião.
Foram necessárias cerca de 80 horas de um computador de alta performance para produzir a primeira simulação, que mostra como o avião atravessou diversos andares da estrutura em meio segundo, diz o co-diretor do Instituto de Pesquisa da Computação de Purdue, Christoph M. Hoffmann. "Nos próximos meses, exploraremos como a estrutura reagiu ao calor extremo do fogo que levou ao desmoronamento, e refinaremos a apresentação visual".
Os pesquisadores estão analisando quantas colunas foram destruídas inicialmente no núcleo do edifício, uma espinha de 47 vigas de aço que passavam pelo centro da estrutura, diz o professor de Engenharia Estrutural Mete Sozen.
A simulação é financiada pela Fundação Nacional de Ciência dos EUA, e espera-se que o trabalho ajude cientistas e engenheiros a entender situações e fenômenos que não podem ser estudados de outro modo, desde o projeto de prédios mais seguros à criação de novos remédios.
Fonte
Foram necessárias cerca de 80 horas de um computador de alta performance para produzir a primeira simulação, que mostra como o avião atravessou diversos andares da estrutura em meio segundo, diz o co-diretor do Instituto de Pesquisa da Computação de Purdue, Christoph M. Hoffmann. "Nos próximos meses, exploraremos como a estrutura reagiu ao calor extremo do fogo que levou ao desmoronamento, e refinaremos a apresentação visual".
Os pesquisadores estão analisando quantas colunas foram destruídas inicialmente no núcleo do edifício, uma espinha de 47 vigas de aço que passavam pelo centro da estrutura, diz o professor de Engenharia Estrutural Mete Sozen.
A simulação é financiada pela Fundação Nacional de Ciência dos EUA, e espera-se que o trabalho ajude cientistas e engenheiros a entender situações e fenômenos que não podem ser estudados de outro modo, desde o projeto de prédios mais seguros à criação de novos remédios.
Fonte
Já tá 
.
Comentário