Behaviour of Steel Structures in Seismic Areas is a comprehensive overview of recent developments in the field of seismic resistant steel structures. It comprises a collection of papers presented at the seventh International Specialty Conference STESSA 2012 (Santiago, Chile, 9-11 January 2012), and includes the state-of-the-art in both theoretical and experimental research on the behaviour of steel structures in seismic areas. The book is organized in the following sections: - Performance-Based Design of Structures; - Seismic, Wind and Exceptional Load; - Material Behaviour; - Member Behaviour; - Connection Behaviour; - Global Behaviour; - Analytical and Experimental Methods; - Mixed and Composite Structures; - Passive and Active Control; - Strengthening and Repairing; - Codification; - Design, Fabrication and Practice. Behaviour of Steel Structures in Seismic Areas aims to close the gap between the results of academic research, codification and application on the one hand, and common practice on the other. This book provides a complete framework of the most recent trends in the field of steel structures in seismic areas, with particular reference to the utilisation of multi-level performance based design concepts, the analysis of factors influencing the steel structure behaviour during strong ground motions, minimizing earthquake damage, seismic retrofit, the collapse behaviour of steel structures, recent developments in advanced large-scale experimental techniques, and the utilization of large-scale seismic testing facilities. The book is a valuable resource for engineers, academia and Ph.D. students in Civil Engineering, Earthquake Engineering, Structural Engineering, Steel Construction, Steel Development, and Building Disaster Prevention.