薄壁方钢管混凝土柱的抗震性能分析  

Study on Seismic Behavior of Thin-walled Square Steel Tube Enveloped Concrete Columns

作　　者：李艺 高喜安 孙新坡 LI Yi;GAO Xi'an;SUN Xinpo(School of Civil Engineering,Sichuan University of Science&Engineering,Zigong 643000,China)

机构地区：[1]四川轻化工大学土木工程学院,四川自贡643000

出　　处：《四川轻化工大学学报（自然科学版）》2020年第6期78-82,共5页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：国家自然科学基金面上项目(41472325);国家自然科学基金面上项目配套项目(E10108219);四川理工学院人才引进项目(E10402623)。

摘　　要：为了研究薄壁方钢管混凝土柱的抗震性能,在已有试验的基础上,建立了有效的三维数值模型,对轴压比和混凝土强度进行了参数分析。研究薄壁方钢管混凝土柱在往复荷载作用下的受力性能,分析了轴压比和混凝土强度对破坏模式、滞回性能、延性性能和耗能能力的影响规律。结果表明:随着轴压比的增大,薄壁方钢管混凝土柱的承载力、延性性能和耗能能力逐渐下降;薄壁方钢管柱的承载力和耗能能力都随着混凝土强度的提高而增大,但是其延性指标逐渐降低。通过分析方钢管的截面极限承载力状态,提出了抗弯承载力计算方法。In order to study the seismic behavior of thin-walled concrete-filled square steel tubular columns,an effective three-dimensional numerical model is established based on the existing tests,and the parameter analysis of the axial compression ratio and concrete strength is carried out.The mechanical behavior of thin-walled concrete-filled square steel tubular columns under cyclic loading is studied.The influence of axial compression ratio and concrete strength on failure mode,hysteretic performance,ductility and energy dissipation capacity is analyzed.The results show that the bearing capacity,ductility and energy dissipation capacity of thin-walled square steel tube columns decreases gradually with the increase of axial compression ratio;the bearing capacity and energy dissipation capacity of thin-walled square steel tube columns increase with the increase of concrete strength,but its ductility index is gradually decreasing.Based on the analysis of the ultimate bearing capacity of the square steel tube,the calculation method of bending bearing capacity is put forward.

关 键 词：薄壁方钢管 滞回性能 延性 耗能能力 轴压比 

分 类 号：TU398[建筑科学—结构工程]