NEHRP Clearinghouse

Engineering and Organizational Issues Related to The World Trade Center Terrorist Attack. Volume 2: Reconnaissance and Preliminary Assessment of a Damaged Building Near Ground Zero.
Berman, J.; Warn, G.; Whittaker, A.; Bruneau, M.
April 2002, 40 p.
An Multidisciplinary Center For Earthquake Engineering (MCEER) research team, sponsored by the National Science Foundation, visited Ground Zero twice in the two weeks following the attacks of September 11, 2001, to collect perishable data related to the collapse of the two 110-story towers and collateral damage to buildings and infrastructure surrounding the World Trade Center complex. The visit on September 23 involved a walk-through of one high-rise building that was badly damaged by large pieces of debris that were ejected from World Trade Center Tower 2 as it collapsed. This summary report presents information from the building frame with properties similar to those of the damaged building. Linear and nonlinear analyses were undertaken. Such analyses have shown that the use of rigid beam-to-column connections in the building that partially collapsed to be transferred to adjacent undamaged vertical components.
Ground Zero; Terrorism; Buildings; Damage assessment; Earthquake engineering; Linear analysis; Collapse; Multidisciplinary teams; New York; Research; Reconnaissance; Gravity loads; World Trade Center; Attack; Infrastructure; Nonlinear analysis; Structural analysis; Debris