摘要
钢框架组合节点考虑楼板组合效应后,其承载能力大幅提高,节点区刚度相应增大,可能对抗震造成不利影响。采用通用有限元软件ABAQUS建立非线性精细有限元模型,并对单元选取,螺栓受力行为和材料的应力应变关系及损伤模型的确定进行详细说明。结合国内外已有的钢框架组合梁节点拟静力试验,验证了非线性有限元模型的正确性和适用性。试验和有限元分析结果均表明:考虑楼板的组合效应之后,该类型节点的刚度和承载力均有较大幅度提高,承载力提高幅度约为26%,节点区弹性刚度提高了30%左右;在静力往复荷载作用下,该类型节点的滞回曲线较为饱满,耗能能力强,具有良好的抗震性能。
The capacity and stiffness of the steel frames are improved significantly considering sla composite effect which may cause bad effects on the seismic. Efficient and accurate FEM of ABAQUS wa proposed for numerical simulation. And the selection of elements types, the material stress-strai relationship and damage model were made a detailed description. Non linear finite element model wa approved with existing steel frame-composite connections quasi-static test home and abroad. It is show that the capacity of this type connections is improved by nearly 26% and the stiffness by 30%. And thi type of connections have more full hysteretic curve with high energy-consuming ability and good seismi performance.
出处
《土木建筑与环境工程》
CSCD
北大核心
2010年第3期1-7,共7页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金(90815004)
关键词
钢框架组合节点
有限元分析
滞回曲线
承载力
损伤退化
Steel Frame Composite Connections, finite element analysis, hysteretic curve, bearing capacity, damage degradation
