An alternative approach for the prediction of the behaviour and resistance of structural elements.

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The proposed research program addresses the behavior, resistance and design of steel sections and members. As a response to a fundamental need for (i) improved, quicker, simpler and mechanically-based design approaches and (ii) advanced design tools (software), the main objective consists in developing an innovative, alternative approach, the Overall Interaction Concept (O.I.C.). The O.I.C. has emerged as the most appropriate approach, offering a sound theoretical framework to structural elements made of current and future materials. It was though and built to (i) improve actual design practice, (ii) increase accuracy, (iii) advance simplicity and consistency, and (iv) provide a sound framework for computer-assisted resistance predictions. In the middle to long term, this approach shall supersede all design standards, not only in Canada but also worldwide.****In this respect, the applicant has initiated in 2012 a dedicated international research consortium called S.T.S.S., involving both academic and industrial partners. Significant advances have already been achieved, in particular with respect to the design of hollow section members, where the O.I.C. was shown to yield excellent results. The research works detailed herein therefore logically fit into continuous and consistent developments, and are relative to (i) open section members (hot-rolled or welded, standard steel grades and high strength steels), (ii) materials with a non-linear stress-strain response for which current mechanical models are not appropriate and (iii) the influence of shear stresses on resistance, by means of an O.I.C. approach.****Several test series on both sections and members are foreseen, as well as extensive non linear shell F.E. simulations. Consequently, extensive training of highly qualified personnel is of prime importance, and will take place in an international context, under the S.T.S.S. umbrella. The proposed investigations shall also benefit from the principal investigator's wide international experience and collaborations, as well as commitments in several experts technical and normative committees.****In the long term, O.I.C.-based design approaches shall significantly impact both scientific developments, standards evolution and daily design practice.***