K型偏心支撑钢框架结构抗震性能分析
Seismic Performance Analysis of K-shaped Eccentrically Braced Frame
黄昆 1刘尚文2
作者信息
- 1. 江西中煤建设集团有限公司,江西 南昌 330001
- 2. 南昌大学工程建设学院,江西 南昌 330000
- 折叠
摘要
偏心支撑结构具有优秀的抗震性能、耗能能力和震后修复能力.为了进一步研究K型偏心支撑钢框架结构的抗震性能,直观地分析其在地震作用下的变形能力和应力分布情况,文中应用ABAQUS软件建立了K型偏心支撑结构的数值分析模型,研究其在小震、中震、大震作用下的变形模式和滞回性能.研究表明,地震作用下,K型偏心支撑结构损伤集中在消能梁段,其余构件基本不发生损伤;从滞回曲线和骨架曲线分析,该结构表现出良好的耗能能力和较高的承载力;结构最大的竖向变形出现在非消能梁段与消能梁段连接处且非消能梁段端部出现最大应力区域,可能导致非消能梁段的破坏.
Abstract
Eccentrically braced frame has excellent seismic performance,energy dissipation capacity and post-earthquake recovery capability.To further study the seismic performance of K-shaped eccentrically braced frame and visually analyze the deformation capacity and stress distri-bution under earthquake actions,based on the ABAQUS software,a numerical model of K-shaped eccentrically braced frame was established to investigate its deformation patterns and hysteresis behavior under small,moderate and large earthquake.The results show that the damage in K-shaped eccentrically braced frame is concentrated on the shear link,while other components remain undamagedduring seismic actions.A-nalysis of hysteresis and skeleton curves indicates that K-shaped eccentrically braced frame has significant energy dissipation capability and high load-bearing capacity.The maximum vertical deformation of the structure occurs at the connection between the beam out of link and shear link,and the end of the beam out of link experiencing the highest stress region,potentially leading to the failure of beam out of link.
关键词
K型偏心支撑结构/普通剪切型消能梁段/抗震性能/滞回曲线Key words
K-shaped eccentrically braced frame/Ordinaryshear link/Seismic performance/Hysteresis curve引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据