Stahl so glatt umzuformen, braucht man Temperaturen von mindestens 2000 Grad F (1100 Grad C).
"If you remember the Salvador Dali paintings with the clocks that are kind of melted--it's kind of like that." He added, "That could only happen if you get steel yellow hot or white hot--perhaps around 2,000 degrees."
Zitat aus Jeffrey R. Young, "Scholars Work to Rebuild the World Trade Center Virtually."
Das Zitat kommt von einem der größten Fachleute für Stahl in den USA, der den Stahl im Trümmerberg gesehen hat!
Abolhassan Astaneh-Asl, Ph.D., P.E.
Professor
Department of Civil and Environmental Engineering
781 Davis Hall, University of California, Berkeley, CA 94720-1710
EDUCATION:
M.S.E. (1979) and Ph.D. (1982) from the University of Michigan, Ann Arbor
CURRENT POSITION:
Professor, University of California at Berkeley.
PROFESSIONAL MEMBERSHIP:
American Society of Civil Engineers (ASCE), Council on Tall
Buildings and Urban Habitat (CTBUH), Earthquake Engineering Research Institute (EERI), Structural Stability Research Council (SSRC), Research Council on Structural Connections (RCSC), Consortium of Universities for Research in Earthquake Engineering (CUREE), Advisory Committee AC4 and Technical Committee TC8 of Eurocode Europe, Structural Engineers Association of Northern California, (SEAONC), Structural Steel Educational Council, (SSEC), Committee on Design of Blast-Resistant Steel Structures (AISC)
PROFESSIONAL REGISTRATION:
Registered Professional Engineer, P.E. (California)
MAJOR AWARD:
Winner of 1998 ,T.R. Higgins Award, American Institute of Steel Construction
TEACHING:
Has taught courses since 1982 on Engineering Mechanics, Static, Design of Steel
Structures, Advanced Steel Design, Design of Steel and Composite Structures, Inelastic Behavior and Plastic Design of Steel Structures, Comprehensive Design of Structures. He has also taught a number of short courses to professionals on design of structures and earthquake engineering particularly on bridges to Caltrans engineers and others.
MAJOR RESEARCH & DEVELOPMENT PROJECTS DURING LAST 5 YEARS:
1. “Tests of Critical members of the Golden Gate Bridge”, (Funded by Golden gate Bridge), 95-96
2. “Shake-table Tests of Computers with and without Support Restrainers”, 96-97.
3. “Cyclic Behavior and Seismic Design of Steel Piles”, (Funded by Caltrans), 96-98.
4. “Nonlinear Analyses of the Suspension Spans of the Bay Bridge”, (Funded by LLNL & UCB, 95-98.
5. “Seismic Behavior and Design of Shear Connections”, (Funded by FEMA/SAC), 97-98.
6. “Cyclic Tests and Seismic Design Provisions for Steel Shear Walls”, (Funded by GSA),99-01.
7. “Cyclic Tests of Traditional and Innovative Composite Shear Walls”, (Funded by NSF) 98-present.
8. “Testing and Studying Blast-Resistant Structures”, (Funded by GSA and AISC) 97-present.
9. “Studies of Collapse of the World Trade Center”,(Funded by NSF) ,01-present
PUBLICATIONS
Has published more than 150 papers, reports and other publications on the behavior and design of steel structures subjected to seismic, gravity and blast loads
Er war in der Untersuchung folgendermassen involviert:
"My involvement in the investigation of the collapse of the World Trade Center is to
conduct a reconnaissance of the collapsed and damaged WTC buildings and to collect the perishable data.
(...)
So far, I have made three trips to NYC and spent a total of about 25 days there
conducting field investigation and collecting data. Upon arrival to NYC on September 19, and after visiting Ground Zero and paying my respects and prayers to the victims, I started my reconnaissance and collection of the perishable data. I have collected some data on design and construction of the WTC and have met and discussed the case with the structural engineers who have designed the WTC Buildings. Thanks to cooperation of the HSNE recycling plant, I have been able to study the steel from the WTC before recycling. I have identified and saved some components of the structures that appear to have been subjected to intense fire or impact of fast moving objects. Figures 1 through 4 show examples of inspected structures. These critical pieces are saved as perishable data and can be used in future research. "
von wegen Kaltpressung
:)... es gibt für mich keinen Zweifel, dass in den WTC eine Hitzeentwicklung jenseits 1100 Grad Celsius stattgefunden haben muss. Problem: Das Bürofeuer (auch mit Kerosin) im WTC wurde NICHT heißer als 1000 Grad C und war lediglich die ersten 20 Minuten des Brandes so heiß (wegem dem Kerosins als Brandbeschleuniger). Danach flachte die Temperatur auf 500 Grad C ab.
Wie kann Stahl 1100 Grad C heiß werden, wenn die Feuer maximal 1000 Grad heiß waren? Einfache Frage eigentlich.
Offenbar war er sich der Sprengkraft seiner Aussage bewusst ... denn gelb glühender Stahl hat eine Temperatur von um die 1200 Grad C (eher mehr) und weiß glühender 1400 Grad C. Wie kommt er dann darauf, dass diesen Stahl auf um die "around 2000 degree" (siehe Zitat oben) zu schätzen? Also um die 1100 Grad C heiß.
Ich sehe die "debunkern" hier funken :
"Houston - we have a problem!"