摘要
对9根不同参数的带肋铝合金管混凝土轴压短柱进行了有限元模拟,研究分析了组合柱的破坏形态、轴压荷载-位移关系、峰值荷载、延性系数以及应力云图。结果表明:所有试件的破坏形态均为鼓曲型破坏;组合柱表现出良好的组合效应,具有较好的承载能力和延性,核心混凝土强度的提升会使试件延性有所下降,承载力有所上升;铝管内部加设纵肋后,铝管对核心混凝土有更好的约束效果,组合柱的极限承载力和延性均有明显提升。将有限元模拟与理论计算结果进行比较分析,发现基于统一理论的韩林海计算公式和钟善桐计算公式得出的结果与有限元模拟结果较为接近,在此基础上给出了带肋铝合金管混凝土轴压短柱的建议计算公式。
Finite element simulations analysis of nine concrete filled aluminum alloy tubular short columns with ribs under axial compression with different parameters was carried out,to study the damage morphology,axial compression load-displacement relationship,peak load,ductility coefficients,and stress cloud diagrams of the composite columns.The results showed that the damage morphology of all specimens was bulging type damage.The composite column shows good combination effect with good load bearing capacity and ductility.The upgrading of the core concrete strength would decrease the specimen ductility and increase the load bearing capacity.With the longitudinal ribs stiffened inside the aluminum tubes,the aluminum tubes imposed better restraining effect on the core concrete,and the ultimate load bearing capacity and ductility of the composite columns had been significantly improved.Comparing the finite element simulation results with the theoretical calculation results,it was found that the results of Han Linhai's calculation formula and Zhong Shantong's calculation formula,based on the unified theory,are close to the finite element simulation results.On this basis,the calculation formula for concrete filled aluminum alloy tubular short columns with ribs under axial compression was proposed.
作者
陈冠君
黎明
Chen Guanjun;Li Ming(School of Civil Engineering,Suzhou University of Science and Technology,215011,China)
出处
《特种结构》
2023年第5期13-19,共7页
Special Structures
关键词
带肋铝合金管混凝土
有限元分析
受力性能
承载力
延性
Stiffened concrete flled aluminum alloy tube
Finite element analysis
Mechanical perfommance
Bearing capacity
Ductility
