The influence of the radius of curvature of the knee member on the behavior of knee braced frames
Reducing the irreversible damage caused by earthquakes has always been the ultimate goal for researchers and scientists in earthquake engineering. Knee-braced frames (KBFs) are one of the common lateral load-resisting systems against seismic forces. During a severe earthquake, all frame components r...
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| Main Authors: | , |
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| Format: | Article |
| Language: | Persian |
| Published: |
Razi University
2024-06-01
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| Series: | مدلسازی پیشرفته در مهندسی عمران |
| Subjects: | |
| Online Access: | https://amcen.razi.ac.ir/article_3285_f598801d1b433fdf9c49f89e838e0622.pdf |
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| Summary: | Reducing the irreversible damage caused by earthquakes has always been the ultimate goal for researchers and scientists in earthquake engineering. Knee-braced frames (KBFs) are one of the common lateral load-resisting systems against seismic forces. During a severe earthquake, all frame components remain within the elastic range, while only the knee member enters the plastic range. In previous studies, the knee member was considered a linear element (with an infinite radius of curvature) that acted as a beam when absorbing energy. In the present research, using the ABAQUS finite element software, the radius of curvature of the knee member was reduced, transforming it from a linear element into an arc element. The simultaneous impact of axial force, shear force, and bending moment on energy absorption was examined. The results indicate that in frames with a constant span-to-height ratio, the arched knee member demonstrates better seismic performance compared to the linear knee member, increasing the frame's load-bearing capacity by up to 15%. However, with an increase in the span-to-height ratio, alongside a roughly 40% increase in strength, the likelihood of failure more than doubles. |
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| ISSN: | 3060-7620 |