A new methodology to design against disproportionate collapse is proposed for critical building that must be operational after a terrorist attack. The disproportionate collapse analysis uses the alternate path method where the structure must be designed to support the...

Visit ASI Engineers as they present on the three-dimensional nonlinear dynamic analysis they performed on a single well observation platform. The structure consists of a single level service deck supported by three driven piles and a bracing frame. Extreme...

The paper describes the complexity of the seismic assessment and rehabilitation of three different existing buildings in New Zealand. The assessment was performed using Progressive Collapse Analysis. This method has been materialized into explicit requirements for...

During the 2009 L’Aquila earthquake, the tower of Santo Stefano di Sessanio, the town’s iconic symbol, collapsed to the ground. The tower was believed to have been rendered vulnerable to collapse because of 20th-century renovations to the tower’s...