摘要
为进一步研究负载钢柱在钢筋混凝土外包加固后的正截面承载力问题,基于已有试验和文献研究,建立有限元分析模型.利用ABAQUS软件分析其组合柱的受力过程及破坏形态,同时分析了初始负载大小、混凝土等级以及型钢等级对组合柱极限承载力的影响.分析结果表明,加大初始负载会减少加固后型钢-混凝土组合柱的极限承载力;增加混凝土或型钢的强度等级都会使加固后组合柱的极限承载力提高.采用系数修正法对已有正截面承载力公式中的纵筋强度进行折减,折减后的计算结果与有限元模拟和试验结果吻合良好.
In order to study the bearing capacity of reinforced concrete columns strengthened with reinforced concrete based on the existing experiment and literature research,finite element analysis model was built.The finite element software ABAQUS was used to analyze the loading process and failure mode of steel reinforced concrete columns under axial compression load,the effects of different initial load,concrete grade and steel grade on the ultimate bearing capacity of reinforced concrete composite columns are analyzed.Analysis results show：the increase of initial load will reduce the ultimate bearing capacity of the composite columns;the ultimate bearing capacity of composite columns increases with the increase of concrete strength and steel strength.The calculation formula of the bearing capacity of the normal section is modified,and the calculated results are in good agreement with the finite element simulation and experimental results.
出处
《沈阳大学学报（自然科学版）》
CAS
2017年第5期394-399,共6页
Journal of Shenyang University：Natural Science
基金
国家自然科学基金资助项目(51408371)
关键词
负载钢柱
加固
有限元模拟
承载力计算
折减
Loaded steel column
reinforce
finite element simulation
bearing capacity calculation
reduction
