连柱支撑钢框架结构抗震性能研究

Study on seismic behavior of the linked column steel bracing frames

为研究连柱支撑钢框架结构的抗震性能,设计了1个BASE试件和4个不同支撑截面的对比试件,采用有限元分析软件ABAQUS分析其滞回性能。分析结果表明:连柱支撑钢框架结构破坏过程呈现明显的三阶段性,塑性损伤集中于耗能连梁;结构具有良好塑性变形能力、较大的水平抗侧刚度、较好的延性及耗能能力;支撑的内力设计放大系数取为1.4时,结构具有良好的抗震性能;层间位移角为1/550~1/14时,通过替换耗能连梁,结构可以快速恢复使用。

In order to study the seismic behavior of the linked column steel bracing frames,a base specimen and four comparative specimens with different bracing sections were designed,and the finite element analysis software ABAQUS was used to analyze the hysteretic behavior of the specimens.The result shows that the failure process of the linked column steel bracing frame has three stages and the structure 's plastic damage is concentrated on the links.The structure has good plastic deformation capacity,high lateral stiffness,good quality of ductility and energy consumption.When the internal force magnification factor of the bracing is 1.4,the structure has a good seismic performance.By replacing the links,the structure can rapidly return to occupancy when the inter-story displacement angle ranges from 1/550 to 1/140.