【摘要】 铝合金管混凝土承载力高、耐久性好、外形美观，在外露结构中应用前景广阔。既往研究已证实了铝合金管混凝土作为结构构件的可行性，但未关注其收缩、徐变性能；而铝合金管刚度低于钢管，收缩徐变对该类新型组合构件力学性能的影响显著。为此，笔者设计并开展了铝合金管混凝土短柱持荷试验；建立并验证了相应的实体有限元分析模型；系统研究了收缩徐变对铝合金管混凝土变形的影响，并与同参数钢管混凝土进行对比分析。结果表明：相比于钢管混凝土，核心混凝土收缩徐变对铝合金管混凝土变形的影响更显著，可使变形增大60%;笔者建立的实体有限元模型能够有效预测铝合金管混凝土的收缩徐变效应，预测结果与试验结果的最大误差仅为4.8%。更多还原

【Abstract】 Concrete-filled aluminum alloy tubes(CFAT) offer high load-bearing capacity, excellent durability, and aesthetic appearance, which has broad application potential in exposed structures.Previous studies have confirmed the feasibility of CFAT as structural members, but research on their shrinkage and creep performance remains limited.Given that the stiffness of aluminum alloy tubes is lower than that of steel tubes, the shrinkage and creep effects would be more significant in these new composite members.To address this, this study designed and conducted sustained-load tests on CFAT short columns; a corresponding solid finite element model(FEM) was established and validated; the effects of shrinkage and creep on the deformation of CFAT were systematically investigated and compared with those of companion concrete-filled steel tubes(CFST).The results indicate that: Compared to CFST,the shrinkage and creep effects of core concrete are more significant on CFAT members, leading to up to 60% increase in the deformation; The solid FEM established in this study can effectively predict the shrinkage and creep effects of CFAT,with a maximum error of only 4.8% against the test results.更多还原