摘要
通过对3个足尺圆钢管混凝土长柱的试验研究,分析不同轴压比下圆钢管混凝土长柱的抗弯承载能力和破坏形式.结果表明,相比轴压比为0时的圆钢管混凝土长柱,轴压比为0.1、0.2时的圆钢管混凝土长柱的抗弯承载力和抗侧刚度减小,同时延性也减小;可见轴压力的变化对钢管混凝土长柱抗弯受力性能有显著的影响.在试验的基础上,将不同轴压比的抗侧刚度与考虑P-△效应时相关规程、文献进行比较,给出建议公式,为钢管混凝土结构在实际工程中的应用提供参考.
The experimental studies on three full size concrete-filled circular steel tubular long columns under different axial com- pression ratio were conducted, and the bending capacity and the failure modes were analyzed. The test results show that the bending bearing capacity and the lateral stiffness of concrete-filled circular steel tubular long columns under the axial compression ratio of 0.1 or 0.2 decreased comparing with the axial compression ratio of 0, and at the same time, the ductility reduced, too. So the effect of axial compression change on the bending performance of concrete-filled circular steel tubular long columns was significant. On the basis of experiment, the calculation regulations in Chinese and foreign codes of the considering P-△ effect were analyzed and com- pared with the experimental lateral stiffness under different axial compression ratio. The proposed formula was given and a reference for encased structures in the practical engineering application provided.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2016年第5期654-660,共7页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家电网公司2014年依托工程基建新技术研究项目-钢管混凝土构架在750 kV变电站中的应用研究
住房和城乡建设部2014年科学技术项目(2014-K2-011)
陕西省自然科学基础研究基金面上项目(2014JM7244)
陕西省教育厅专项科研计划项目(2013JK0977)
关键词
圆钢管混凝土长柱
轴压比
抗弯承载力
抗侧刚度
concrete-filled circular steel tubular long columns
the axial compression ratio
the bending capacity
the lateral stiffness
作者简介
杨俊芬（1979-），女，副教授，主要从事钢结构教学和科研工作．E-mail：yjf9807@126．com．
