摘要
加强层的设置对钢框架-混凝土核心筒结构的抗震性能有重要影响。借助SAP2000建模,通过模型转换运用ABAQUS对一个36层未设置加强层与设置三层加强层的钢框架-混凝土核心筒结构进行结构和双向动力时程分析,并对设置三层加强层的结构体系进行IDA分析。结果表明:在8度和9度罕遇地震作用下,设置三层钢桁架加强层的结构可以明显改善结构整体刚度和屈服顺序,提高结构整体延性;加强层处的水平钢桁架和结构外钢框架刚度处在同一数量等级上,在大震作用下,水平钢桁架先于其他构件破坏,能够起到一定耗能作用;在特定地震动作用下结构体系各个性能点值分别为IO=1/215,CP=1/57,GI=1/10,说明该结构体系设置加强层具有很好的抗震性能。
This paper is concerned with an in-depth application of the notion that the strengthening layer arrangement has an important influence on the seismic performance of the steel frame concrete core tube structure. The study is aided by structural SAP2000 modeling and model transformation, using ABAQUS and thereby performing a structure analysis and two-way dynamic time history analysis of two36-storey steel frame concrete core tube structures： one is provided with three strengthening layers and the other is not provided with any strengthening layers; and an IDA analysis of the structure system of three strengthening layers. The results show that, when exposed to 8 degrees and 9 degrees of rarely occurred earthquake, the structure provided with three steel truss reinforced layers can provide a significant improvement in overall rigidity, yield order, and overall ductility of structure; the rigidity in the horizontal steel truss and external steel frame structures as arranged in strengthening layers is of the same order of magnitude, with the result that, when exposed to large earthquakes, horizontal steel truss experiences an earlier destruction than other structural members, thus playing a contributing role in energy consumption;and when subjected to the specific ground motions, all performance values, such as IO=1/215, CP=1/57,and GI=1/10, reveal that the structure system with a reinforcing layer boasts a better seismic performance.
出处
《黑龙江科技大学学报》
CAS
2015年第6期641-648,共8页
Journal of Heilongjiang University of Science And Technology
基金
国家自然科学基金项目(51478168)
关键词
钢框架-核心筒结构
加强层
动力时程分析
IDA
steel frame-core wall structure
strengthened layer
dynamic time history analysis
IDA
