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STUDY ON CONSTITUTIVE MODEL OF CORE CONCRETE OF RECYCLED AGGREGATE CONCRETE FILLED STEEL TUBULAR COLUMNS UNDER COMPRESSION
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摘要: 在钢管混凝土结构中引入机制砂以及再生粗骨料对解决资源短缺以及建筑垃圾污染问题具有重要的意义，但目前针对钢管机制砂再生混凝土构件的研究较少，且还没有研究给出适用于有限元分析的核心机制砂再生混凝土本构模型。通过ABAQUS软件建模的方式，结合相关文献中试验数据，对比了几种常用的再生混凝土本构模型，根据荷载-位移曲线以及极限承载力的对比结果，确定了最优的再生混凝土本构模型；并在此基础上，以文献中数据为依据，对本构模型的计算公式进行了修正，引入了机制砂的影响。最终给出了适用于有限元分析的钢管机制砂再生混凝土核心混凝土本构模型。Abstract: It is of great significance to introduce manufactured sand and recycled coarse aggregate into concrete-filled steel tubular (CFST) structures to solve the problems of resource shortage and construction waste pollution. However, there are few studies on recycled concrete members with manufactured sand and no research has been made on the constitutive model of recycled concrete with manufactured sand which is suitable for finite element analysis. In this paper, through ABAQUS software modeling, combined with the test data in relevant literature, several commonly used constitutive models of recycled concrete were compared. According to the comparison results of load-displacement curve and ultimate bearing capacity, the optimal constitutive model of recycled concrete was determined; on the basis of the data in the literature, the calculation formula of the constitutive model was modified, and the infuence of manufactured sand was discussed. Finally, a constitutive model for the concrete core of recycled concrete with manufactured sand filled steel tube.
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Key words:
- manufactured sand /
- recycled concrete /
- constitutive model /
- finite element analysis
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1. 马腾飞，陈志华，杜颜胜，张宇桐，马斌. L形方钢管再生混凝土组合异形柱压弯扭力学性能有限元分析. 沈阳建筑大学学报(自然科学版). 2023(03): 437-445 . 
百度学术2. 徐增珍，董玉英，刘超，杜颜胜，张宇桐. 方钢管铁尾矿再生混凝土柱抗震性能有限元分析. 河北工业科技. 2023(05): 362-373 . 百度学术3. 黄波，张亮，翟江棚. 不锈钢管组合短柱轴压承载能力试验研究. 中外公路. 2023(06): 149-152 . 百度学术4. 杜颜胜，李佳岐，陈志华，高秋利，甄志禄，刘永奇，陈靖昕. 矩形截面钢管尾矿砂再生混凝土柱抗震性能研究. 建筑结构学报. 2022(11): 63-73 . 百度学术其他类型引用(5)
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