摘要
以混凝土强度和约束效应系数为主要变化参数,对8根钢骨-钢管混凝土组合柱的工作机理、延性和极限承载力进行了试验研究,分析了影响这种组合柱性能的主要因素。研究结果表明,组合柱的承载能力随着混凝土强度等级的提高而逐渐提高;轴压组合柱的承载能力随着约束效应系数的增大而逐渐提高。由于钢管、钢骨和核心混凝土的协同工作,可大幅地提高柱子的承载能力,延缓和抑制核心混凝土中剪切斜裂缝的出现和开展,提高了柱的延性。
Through bearing capacity experimentation of 8 composite columns in axially loading,the working mechanisms,ductility and ultimate bearing capacity were studied.The effect of the grade of core concrete and confinement coefficient were discussed.Results show that the bearing capacity of composite column is enhanced gradually with the increase of concrete strength and confinement coefficient.The load-bearing capacity and ductility of the composite column are improved,and the propagation of crack in concrete is mitigated effectively as concrete and steel work together.
出处
《建筑结构》
CSCD
北大核心
2010年第S1期248-250,共3页
Building Structure
关键词
组合柱
轴压
承载力
约束效应系数
composite column
axial compression
load-bearing capacity
confinement coefficient
