Titlebook: Resilience of Cities to Terrorist and other Threats; Learning from 9/11 a Hans J. Pasman (Prof. Emeritus Chemical Risk Manag Conference pro

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Questions on the WTC Investigationn conducted by the National Institute of Standards and Technology (NIST) concluded that the collapse was due to the fires heating the core columns that were stripped of insulation by the aircraft impacts. An alternative cause is considered that puts the cause on insufficient insulation of the steel

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Quantitative Risk Assessment of Aircraft Impact on a High-Rise Building and Collapseted to air. First the generalized method is described. The method takes as inputs phenomenological models of aircraft impact, explosion and fire threats to the building beside the factors characterizing environment and conditions of the incident. As a next step a simplified version is presented and