Seismic performance of improved multistorey X-braced steel frames

被引：7

作者：

Zheng, Liang ^{[1
]}

Dou, Shengrun ^{[1
]}

Tang, Shengming ^{[1
]}

Ge, Hongwei ^{[1
]}

Wen, Wang ^{[1
]}

Zhang, Jianjun ^{[1
]}

Gao, Ying ^{[1
]}

Geng, Shaobo ^{[1
]}

机构：

[1] North Univ China, Dept Civil Engn, Taiyuan 030051, Shanxi, Peoples R China

来源：

JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH | 2024年 / 212卷

基金：

中国国家自然科学基金;

关键词：

X-braced frame structure; Seismic performance; Hysteresis performance; Dissipation coefficient capacity; Arc energy-dissipating structure; BEHAVIOR;

D O I：

10.1016/j.jcsr.2023.108306

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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.

引用

页数：15

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