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SSEF webinar- 4 | Seismic stability of Steel Moment Resisting Frames | Prof. Dimitrios Lignos
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About Prof.Lignos:
Prof. Lignos is a Full Professor and the Chair of the Civil Engineering Institute at École Polytechnique Fédérale de Lausanne (EPFL). A key aspect of his research lies in the development of advanced models and approaches that leverage multi-scale experimentation to advance our understanding of the ultimate limit states that trigger structural collapse in steel structures. Prof. Lignos joined EPFL in 2016 from McGill University, Canada, where he was a tenured Associated Professor in the Department of Civil Engineering and Applied Mechanics. Prior to that he was a post-doctoral researcher at Kyoto University (2010) and Stanford University (2009). He holds degrees in Structural Engineering (Stanford University, M.S. 2004, Ph.D. 2008) and Civil Engineering (NTU, Athens, 5-year Diploma 2003). The work of his group has been acknowledged through several prestigious international awards including the 2022 Raymond Reese Research Prize, the 2019 Walter L. Huber Civil Engineering Research Prize and the 2013 State-of-the-art of Civil Engineering Award, among others, from the American Society of Civil Engineers. As a member of the Project Team 2, he was responsible for the revision of the steel and composite-steel concrete structures in the second generation of Eurocode 8. As an associate member of ASCE-41 he developed new seismic assessment models for steel columns and beam-to-column connections that were adopted in the newly released ASCE-41-23. He regularly serves as a consulting engineer in projects regarding the assessment and retrofitting of existing structures and the stability of steel and composite-steel structures as well as the advanced analysis of structures.
Title: Seismic stability of steel moment resisting frames: recent findings and implementation in design standards
ABSTRACT
This presentation provides an overview on research done by the presenter over the past decade on the seismic stability of steel and composite-steel moment-resisting frames (MRFs). In specific, the talk presents findings from full-scale experiments and computational studies on members and systems. These studies highlight a number of issues that influence the seismic behavior of beam-columns, welded connections as well as shear connectors in composite-steel concrete floor systems among others. Practice-oriented models for selected structural members are also presented that facilitate the seismic assessment of new and existing steel structures. The presentation attempts to highlight practical considerations that have been integrated into national and international seismic design standards regarding the seismic design of steel and composite-steel concrete MRFs.
Prof. Lignos is a Full Professor and the Chair of the Civil Engineering Institute at École Polytechnique Fédérale de Lausanne (EPFL). A key aspect of his research lies in the development of advanced models and approaches that leverage multi-scale experimentation to advance our understanding of the ultimate limit states that trigger structural collapse in steel structures. Prof. Lignos joined EPFL in 2016 from McGill University, Canada, where he was a tenured Associated Professor in the Department of Civil Engineering and Applied Mechanics. Prior to that he was a post-doctoral researcher at Kyoto University (2010) and Stanford University (2009). He holds degrees in Structural Engineering (Stanford University, M.S. 2004, Ph.D. 2008) and Civil Engineering (NTU, Athens, 5-year Diploma 2003). The work of his group has been acknowledged through several prestigious international awards including the 2022 Raymond Reese Research Prize, the 2019 Walter L. Huber Civil Engineering Research Prize and the 2013 State-of-the-art of Civil Engineering Award, among others, from the American Society of Civil Engineers. As a member of the Project Team 2, he was responsible for the revision of the steel and composite-steel concrete structures in the second generation of Eurocode 8. As an associate member of ASCE-41 he developed new seismic assessment models for steel columns and beam-to-column connections that were adopted in the newly released ASCE-41-23. He regularly serves as a consulting engineer in projects regarding the assessment and retrofitting of existing structures and the stability of steel and composite-steel structures as well as the advanced analysis of structures.
Title: Seismic stability of steel moment resisting frames: recent findings and implementation in design standards
ABSTRACT
This presentation provides an overview on research done by the presenter over the past decade on the seismic stability of steel and composite-steel moment-resisting frames (MRFs). In specific, the talk presents findings from full-scale experiments and computational studies on members and systems. These studies highlight a number of issues that influence the seismic behavior of beam-columns, welded connections as well as shear connectors in composite-steel concrete floor systems among others. Practice-oriented models for selected structural members are also presented that facilitate the seismic assessment of new and existing steel structures. The presentation attempts to highlight practical considerations that have been integrated into national and international seismic design standards regarding the seismic design of steel and composite-steel concrete MRFs.
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