Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Seismic Evaluation and Retrofit of Older Concentrically-Braced Frames
Buildings with concentrically braced frame (CBF) lateral force resisting systems constitute a large proportion of existing steel infrastructure in seismically vulnerable regions. However, many were constructed in the era preceding critical milestones in seismic design, including the codification of capacity design and geometric limits on members of the seismic resisting components. These are included in current design of special CBFs, but the engineering community has recognized the vulnerability of older frames. Here, these are termed nonductile CBFs (NCBFs). International research collaboration was undertaken to identify the scope and scale of deficiencies, evaluate as-existing performance, and develop and validate minimally invasive retrofit schemes. The research described herein focuses on experimental evaluation of NCBFs. Initially, frames were tested to simulate the as-existing condition. Then, retrofit schemes that were both practical and effective were implemented. The results show the retrofitted frames have improved performance.
Seismic Evaluation and Retrofit of Older Concentrically-Braced Frames
Buildings with concentrically braced frame (CBF) lateral force resisting systems constitute a large proportion of existing steel infrastructure in seismically vulnerable regions. However, many were constructed in the era preceding critical milestones in seismic design, including the codification of capacity design and geometric limits on members of the seismic resisting components. These are included in current design of special CBFs, but the engineering community has recognized the vulnerability of older frames. Here, these are termed nonductile CBFs (NCBFs). International research collaboration was undertaken to identify the scope and scale of deficiencies, evaluate as-existing performance, and develop and validate minimally invasive retrofit schemes. The research described herein focuses on experimental evaluation of NCBFs. Initially, frames were tested to simulate the as-existing condition. Then, retrofit schemes that were both practical and effective were implemented. The results show the retrofitted frames have improved performance.
Seismic Evaluation and Retrofit of Older Concentrically-Braced Frames
Sen, A. D. (Autor:in) / Ballard, R. (Autor:in) / Sloat, D. (Autor:in) / Johnson, M. (Autor:in) / Roeder, C. W. (Autor:in) / Lehman, D. E. (Autor:in) / Berman, J. W. (Autor:in)
Second ATC & SEI Conference on Improving the Seismic Performance of Existing Buildings and Other Structures ; 2015 ; San Francisco, California
03.12.2015
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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