方钢管再生混凝土轴压短柱力学性能试验研究

发布时间：2018-10-25 09:06

【摘要】：设计了4个方钢管再生混凝土短柱,截面形式分别为方实心、方套圆中空夹层、方套方中空夹层(内管位置不同)。另外设计了2个方套方中空夹层钢管普通混凝土短柱(内管位置不同)作为对比。对短柱施加轴向荷载,分析了试件的破坏形态、荷载-位移关系曲线、荷载-应变关系曲线与横向变形等。结果表明:方钢管再生混凝土短柱与方钢管普通混凝土短柱有着类似的破坏形态;内管斜45°放置的方套方短柱的极限荷载比内管正向放置的方套方短柱的极限荷载提高约3.2%;钢管普通混凝土短柱的极限荷载比钢管再生混凝土短柱的极限荷载提高约6.2%;实心短柱的横向应变发展速率较中空短柱的快。在此基础上,采用有限元软件ABAQUS建立了方钢管混凝土轴压短柱的分析模型,分析结果表明,有限元分析的柱破坏形态和荷载-应变关系曲线上都与试验结果吻合较好。
[Abstract]:Four square steel tube recycled concrete short columns were designed, the cross section were square solid, square round hollow sandwich, square hollow sandwich (different internal pipe position). In addition, two square hollow sandwich steel tube ordinary concrete short columns (with different inner pipe positions) are designed as a comparison. The failure mode, load-displacement relation curve, load-strain relation curve and transverse deformation of the specimen are analyzed by axial load on the short column. The results show that there is a similar failure pattern between the recycled concrete filled square steel tubular column and the ordinary concrete filled square steel tube short column. The ultimate load of square sleeve short column with inner tube slanting 45 掳is about 3.2 higher than that of square sleeve short column with inner pipe forward, and the limit load of ordinary concrete filled steel tube short column is higher than that of regenerated concrete filled steel tube short column. The lateral strain development rate of solid short column is faster than that of hollow short column. On this basis, the finite element software ABAQUS is used to establish the analytical model of the short column under axial compression of concrete-filled square steel tube. The analysis results show that the failure pattern and the load-strain relationship curve of the column analyzed by the finite element method agree well with the experimental results.
【作者单位】：华东交通大学土木建筑学院;华东交通大学江西省建筑过程模拟与控制重点实验室;天津大学建筑工程学院;
【基金】：江西省青年科学家培养对象(20133BCB23015) 江西省研究生创新专项项目(YC-2014-S248)
【分类号】：TU398.9

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