A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic performance of improved multistorey X-braced steel frames
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.
Highlights 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.
Seismic performance of improved multistorey X-braced steel frames
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.
Highlights 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.
Seismic performance of improved multistorey X-braced steel frames
Zheng, Liang (author) / Dou, Shengrun (author) / Tang, Shengming (author) / Ge, Hongwei (author) / Wen, Wang (author) / Zhang, Jianjun (author) / Gao, Ying (author) / Geng, Shaobo (author)
2023-10-24
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2006
Optimal Design Criteria for Multistorey Cross-Braced Frames with Dissipative Devices
| British Library Conference Proceedings | 1996
Seismic performance of concentrically braced steel frames
| British Library Conference Proceedings | 2002
Seismic Steel Design: Braced Frames
| Wiley | 2006