超高层建筑巨型钢管混凝土柱抗震性能的力学参数分析  

Mechanical parameters analysis of seismic behavior of super large high-rise concrete filled steel tubular columns

作　　者：程春驰 CHENG Chunchi(Nuclear and Radiation Safety Center,Beijing 100082,China)

机构地区：[1]环保部核与辐射安全中心,北京100082

出　　处：《混凝土》2018年第12期62-66,共5页Concrete

摘　　要：以超高层建筑巨型钢管混凝土柱抗为研究对象,对其震性能的力学参数进行了研究。结果表明,钢管鼓曲首先在钢管前侧及后侧发生,在试件接近破坏时,鼓曲在钢管左右两侧发生。试件在屈服前处于弹性阶段,P-Δ曲线基本以线性变化为主,在进入弹塑性阶段,刚度在进行加载和卸载时,出现逐步降低现象。钢管高强混凝土柱的最大荷载随着含钢率的降低而减小,最大荷载降低幅度为24.0%;最大荷载随着轴压比的增大而降低,最大荷载降低幅度为23.0%;最大荷载随长细比的增大降低显著,最大荷载降低幅度为24.0%。当高轴压比为0.6、0.8时,试件延性表现良好;位移角延性系数在3.07～4.05时,构件抗倒塌能力、塑性变形能力良好。The mechanical parameters of super tall buildings with mega columns are studied.The results show that the steel pipe drum first occurs on the front and rear sides of the steel tube,and when the test piece is near failure,the drums are on the left and right sides of the steel tube.The specimen is at the elastic stage before yield,and the P-delta curve is mainly linear.When it enters the elastoplastic stage,the stiffness is gradually reduced when loading and unloading.The maximum load of steel tube high strength concrete column decreases with the decrease of steel content,the maximum load is 24%,the maximum load decreases with the increase of axial compression ratio,the maximum load is 23%,the maximum load decreases significantly with the increase of length ratio,and the maximum load is 24%.When the high axial compression ratio is 0.6 and 0.8,the ductility of specimens is good.When the displacement ductility factor is 3.07~4.05,the anti collapse ability and plastic deformation ability of the components is good.

关 键 词：抗震性 混凝土柱 最大荷载 钢管 延性系数 

分 类 号：TU528.01[建筑科学—建筑技术科学]