Theory of plastic mechanism control for the seismic design of braced frames equipped with friction dampers |
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| Institution: | 1. Dipartimento di Ingegneria, Università di Napoli Parthenope, Centro Direzionale Isola C4, 80143 Napoli, Italy;2. Laboratoire de Mécanique des Structures Industrielles Durables, UMR CNRS/EDF/CEA 8193, 1, Avenue du Général De Gaulle, 92140 Clamart Cedex, France;1. Laboratoire Amiénois de Mathématique Fondamentale et Appliquée, CNRS UMR 7352, UFR des Sciences, 33, rue Saint-Leu, 80039 Amiens Cedex 1, France;2. Laboratoire de Mécanique et d’Acoustique, CNRS UPR 7051, Centrale Marseille, Université Aix-Marseille, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France;3. Dipartimento di Ingegneria, Università di Ferrara, Via Saragat 1, 44122 Ferrara, Italy;1. Section of Materials and Environment, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands;2. Modelling & Simulation Centre, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, UK;3. Research Centre for Radwaste and Decommissioning, The University of Manchester, Manchester M13 9PL, UK;1. Structural Engineering Division, Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran;2. Mechanical Engineering Division, Faculty of Engineering and Technology, Tarbiat Modares University, Tehran, Iran |
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| Abstract: | An innovative approach for the design of a seismic resistant system composed by the combination of a MR-Frame and a bracing system equipped with friction dampers is presented. From a multi-scale point of view, at local scale, supplementary energy dissipation is provided by means of friction dampers, while, at global scale, the development of a global type mechanism is assured involving all the friction dampers equipping the structure. The activation of all the friction dampers requires an advanced design procedure. Toward this end, the theory of plastic mechanism control, which is based on the application of the kinematic theorem of plastic collapse is extended to the concept of mechanism equilibrium curve, is applied. The fulfillment of the design goal has been pointed out by means of both pushover and dynamic non linear analyses whose results are herein presented and discussed. |
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| Keywords: | Multi-scale Friction dampers Global mechanism Plastic mechanism control |
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