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Seismic Stability and Resilience in Steel Buildings скачать в хорошем качестве

Seismic Stability and Resilience in Steel Buildings 4 месяца назад

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Seismic Stability and Resilience in Steel Buildings
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Seismic Stability and Resilience in Steel Buildings

A Warren Distinguished Lecture and Dexter Lecture with Larry Fahnestock Civil and Environmental Engineering University of Illinois Urbana-Champaign ABSTRACT The fundamental basis for seismic stability is clear – during an earthquake, a building must be capable of carrying gravity loads while developing large inelastic deformations and associated lateral displacements. However, structural design to achieve this performance objective is complex and depends upon multiple system parameters. Building lateral systems with high ductility are used extensively in high-seismic regions, but in moderate-seismic regions, lateral systems with low ductility are ubiquitous. The inelastic response characteristics of low-ductility and high-ductility systems are starkly different, and seismic stability must be ensured across this wide variation in behavior. However, in current seismic design provisions, the global destabilizing effects of gravity are typically considered with simplistic elastic models that may not properly address the actual inelastic earthquake response of building structures. In this presentation, Fahnestock explores foundational seismic stability principles and inelastic earthquake response using results from large-scale tests and numerical earthquake simulations of steel building systems. These results demonstrate that high-ductility response is an insufficient, and not always necessary, condition for seismic stability, and that the most critical parameter for seismic stability and resilience is persistent secondary stiffness. Fahnestock discusses a pragmatic approach for incorporating secondary stiffness into seismic design. SPEAKER Larry Fahnestock has been on the faculty in Civil and Environmental Engineering (CEE) at the University of Illinois Urbana-Champaign since 2006. He is currently Professor and Siess Faculty Scholar in CEE, and Associate Dean for Facilities and Capital Planning in the Grainger College of Engineering. He holds B.S. degrees in architectural engineering and civil engineering from Drexel University and M.S. and Ph.D. degrees in civil engineering from Lehigh University. He has several years of experience designing buildings as a structural engineer and he is a licensed professional engineer in California and Illinois. Fahnestock’s research interests include earthquake engineering, steel structures, building seismic stability and bridge performance under service and extreme loading. He is a Fellow of the American Society of Civil Engineers (ASCE) and of the ASCE Structural Engineering Institute, and he is a Past-Chair of the Structural Stability Research Council. His research awards include the ASCE Raymond C. Reese Research Prize (2009), an ASCE Walter L. Huber Civil Engineering Research Prize (2014), an AISC Special Achievement Award (2016), and a University of Illinois Grainger Engineering Dean’s Award for Excellence in Research (2017). Fahnestock teaches courses in structural systems and behavior and design of steel structures, and his teaching awards include the University of Illinois Grainger Engineering Rose Award for Teaching Excellence (2010) and the Chi Epsilon Central District Excellence in Teaching Award (2013). Categories: Structural; Dexter Lectures

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