摘要
研究不同扩高比对蜂窝钢框架抗震性能的影响。以蜂窝式钢框架结构抗震性能试验为基础,利用有限元软件建立合理的有限元模型。对开孔形式相同的蜂窝梁采用不同腹板扩高比框架结构,并模拟低周反复荷载作用下的受力过程和破坏形式。得到了不同扩高比下蜂窝钢框架的滞回曲线、骨架曲线、刚度退化、延性等性能,并进行对比与分析。结果表明:开孔形式相同时,与扩高前实腹框架相比,扩高比为1.3～1.5时蜂窝梁框架结构均有较好的抗震性能;扩高比为1.6、1.7时,抗震性能下降,在钢框架设计中建议使用扩高比不大于1.5的蜂窝框架梁。
It is researched the impact of the different expansion ratio on the cellular steel frame seismic performance. Based on the testing of cellular steel frame seismic performance, reasonable finite element model is established by using the finite element software. Through the different expansion ratio frame structure using the same opening form, the stress process and failure modes under low cyclic reverse load are simulated, thus getting the hysteretic curve, skeleton curves, stiffness degradation, ductility and other behavior of the framework, which are contrasted and analysed. The results show that with the same openings form of cellular steel frame structure, compared to the unexpanded solid web frame, when the expansion ratio is 1.3- 1.5, the seismic performance is better ; when the expansion ratio is 1.6 and 1.7, seismic performance is decreased. So, the expansion ratio not more than 1.5 of cellular steel frame beam is recommended in the design of steel frame.
出处
《钢结构》
2011年第10期9-13,共5页
Steel Construction
关键词
蜂窝钢框架
抗震性能
扩高比
孔型
有限元
cellular steel frame
seismic performance
expansion ratio
pass
finite element
