Abstract :
[en] Structural robustness and mitigation of progressive collapse is a specific safety consideration which is now addressed in modern codes and standards, including the Eurocodes, and which requires particular care from all professionals involved in the construction industry, including architects, designers, constructors, control officers, and insurance managers. The importance of the robustness design has been recognised by world shacking disasters such as the 9/11 collapse of Twin Towers in New York City and the need for practical guidelines has been triggered. Indeed, the availability of such guidelines for practical application addressed to various construction professionals considering different use and risk of buildings helps to ensure confidence in safety of steel and composite construction.
During the past decade, a significant number of research projects related to the structural response of steel and composite buildings under various exceptional loading situations (impact, fire, earthquake,…) have been carried out, especially in Europe and in the USA. As an outcome of these recent scientific actions, different possible practical methods have been proposed to achieve the mitigation of progressive collapse through effective designs and accounting for the full potential of material characteristics in steel and composite structures.
Purpose of the project “Mitigation of the risk of progressive collapse in steel and composite building frames”- FAILNOMORE, is to consolidate the knowledge developed in the aforementioned research and transform it into practical recommendations and guidelines. The set of practical and user-friendly design guidelines for mitigating the risk of progressive collapse is focused on steel and composite structures subjected to exceptional events such as impact, explosions, fire, seismic, referring also to available normative documents, in order to propose a commonly agreed European design methodology. The project was funded for 24 months (starting from July 2020) by the Research Fund for Coal and Steel (RFCS) under grant agreement No 899371.The present design manual is a part of dissemination material and reflects the main outcomes of the FAILNOMORE project. The present document is divided into three parts:
• Part 1 entitled “Design for robustness” which reflects the design strategies and the design approaches to be adopted. In particular, the normative context is first presented in Section 1.Then, in Section 2, the design methodology to be followed and the design strategies which can be adopted are briefly introduced. Finally, detailed and practice-oriented design guidelines on how to apply the different proposed design approaches are provided from Section 3 to 6 with general conclusions drawn in Section 7.
• Part 2 entitled “Worked examples” which illustrates how the different design approaches can be applied on four actual design examples: a steel and a composite structure designed in a non-seismic area and a steel and a composite structure designed in a seismic area.
• Part 3 entitled “Annexes” which provides the reader with additional detailed information regarding some of the proposed design concepts.
• Part 4 entitled “References” which collects the references mentioned in the present document.
