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Seismic performance of improved multistorey X-braced steel frames.
- Source :
-
Journal of Constructional Steel Research . Jan2024, Vol. 212, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- During an earthquake, the brace of a multistorey X-braced steel frame experiences out-of-plane instability. After the brace becomes unstable, the middle span of the brace-intersected beam exhibits a large imbalance force. This force causes a significant vertical displacement in the middle of the brace-intersected beam. To address this issue, an improved multistorey X-braced steel frame is proposed. Adding an arc energy-dissipation structure to the original structure adjusts the bearing capacity of the brace and ensures that the brace does not lose stability. The deformation of the arc energy-dissipation structure reduces the vertical displacement of the brace-intersected beam. A finite element model of the improved multistorey X-braced steel frame is established, and the seismic performance of the structure is analysed. The analysis shows that the brace of the improved multistorey X-braced steel frame does not experience instability, and the lateral bearing capacity is increased by 20%. The vertical displacement in the middle of the brace-intersected beam is small. The improved multistorey X-braced steel frame exhibits good seismic performance. • Seismic performance of improved multistorey X-braced steel frame was studied. • Improved multistorey X-braced steel frame can solve the out-of-plane instability of brace. • The problems of large unbalanced force and vertical deformation of brace-intersected beam were solved. [ABSTRACT FROM AUTHOR]
- Subjects :
- *STEEL framing
*FINITE element method
*EARTHQUAKES
Subjects
Details
- Language :
- English
- ISSN :
- 0143974X
- Volume :
- 212
- Database :
- Academic Search Index
- Journal :
- Journal of Constructional Steel Research
- Publication Type :
- Academic Journal
- Accession number :
- 173889640
- Full Text :
- https://doi.org/10.1016/j.jcsr.2023.108306