摘要
目的为了研究钢骨-钢管混凝土柱的延性性能及影响因素.方法进行了5个试件的低周反复荷载试验,结合实验结果,分析了试件的骨架曲线、滞回曲线,进行了延性系数和极限位移角的计算.结果因组合柱中的混凝土受到了钢骨-钢管的约束,从而提高了柱的水平承载力和延性.由于混凝土的存在可以避免或延缓钢管和钢骨发生局部屈曲,可以保证其材料性能的充分发挥.研究表明该类柱的延性系数最大达到5.4,最小也达到了3.4,说明延性较好.极限位移角最大为1/22,最小为1/47均满足规范要求.结论钢骨-钢管混凝土柱抗震性能良好,试件承载力随着含骨率增大而增大,随着轴压比的增大而减小;在较高的轴压比下,钢骨-钢管混凝土柱仍表现出良好的延性性能;随着轴压比的增加,钢骨-钢管混凝土柱的延性系数减小;随着含骨率的增加,柱的延性系数增大.
In order to investigate ductility and influence factors of the circular steel tube compile column filled with steel reinforced concrete, the experiments are conducted on 5 specimens to low-frequency cyclic loading,the skeleton curve and the hysteretic curve are analyzed, the ductility factor and the limiting displacement drift are calculated. The capacity and the ductility of the column are improved because the concrete has been constrained by the steel and the steel tube. In addition, the concrete can delay or avoid the local buckling of the steel and the steel tube, and can ensure the material properties to play fully. Study proves that the ductility is good that the maximum of the ductility factor is 5.4, and the minimum is 3.4. The maximum of the ultimate displacement angle is 1/22, and the minimum is 1/47 ,and the results meet standard requirements. The results show that circular steel tube composite columns filled with steel reinforced concrete behave very well, either increasing the steel ratio or reducing the axial compression ratio is favorable to improve the element bearing capacity. The circular steel tube composite column filled with steel reinforced concrete still shows favorable ductility performance even under the high axial compression ratio. The ductility is increasing with the increment of steel ratio, but decreasing with the increment of axial compression ratio.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2009年第4期689-693,共5页
Journal of Shenyang Jianzhu University：Natural Science
基金
辽宁省教育厅科研计划项目国家一级注册结构工程师(20060691)
沈阳市人才资源开放专项(2007140303002)
关键词
钢骨-钢管混凝土柱
延性
滞回曲线
含钢率
轴压比
circular steel tube compile column filled with steel reinforced concrete
ductility
curve of P-△
steel ratio
axial compression ratio
