The consequences of the September 11th, 2001 terrorist attack on the World Trade Centre in New York City will be far reaching for the engineering community. Government authorities worldwide are taking a closer look at the safety of infrastructure, energy supply, nuclear power plants and buildings. Structural engineers today face a new challenge and need guidance on how to design structural systems to withstand various acts of terrorism and threats. This paper briefly discusses the methodology for protective building design and methods for assessing the blast loads on structures and structural components. Two examples of blast effects analysis are presented.
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