轴心受压组合T形短柱力学性能数值模拟分析
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摘要
为研究轴心受压组合T形短柱力学性能,运用有限元软件ABAQU S建立有限元模型,考虑钢管厚度、混凝土强度和钢材强度等级以及肢厚的影响,对轴心受压钢管混凝土组合T形短柱的荷载-变形关系曲线进行模拟分析,并比较分析组合T形柱与普通T形柱的承载力与破坏形态。结果表明,组合T形柱极限承载力与钢材面积及屈服强度、混凝土面积及圆柱体抗压强度成正比;组合T形短柱的承载力比普通T形短柱的高,达到极限承载力时的变形更大,延性更好。
In order to study the mechanical properties of concrete-filled steel tubular composite T-section short columns subjected to axial compression,the finite element analysis software ABAQUS was used to establish the finite element models and the influence factors of steel tube thickness,strength of concrete and steel,flange thickness were considered,sequentially,the load-deformation relationship curves were simulated and the ultimate bearing capability as well as the failure modes were compared.The analytical results show that the ultimate bearing capability of composite T-section columns is proportional to the area and the yield strength of steel as well as the area and cylinder strength of concrete; compared with ordinary T-section columns,composite T-section columns have higher ultimate bearing capability,larger deformation and better ductility.
In order to study the mechanical properties of concrete-filled steel tubular composite T-section short columns subjected to axial compression,the finite element analysis software ABAQUS was used to establish the finite element models and the influence factors of steel tube thickness,strength of concrete and steel,flange thickness were considered,sequentially,the load-deformation relationship curves were simulated and the ultimate bearing capability as well as the failure modes were compared.The analytical results show that the ultimate bearing capability of composite T-section columns is proportional to the area and the yield strength of steel as well as the area and cylinder strength of concrete; compared with ordinary T-section columns,composite T-section columns have higher ultimate bearing capability,larger deformation and better ductility.
引文
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[8]Furlong R W.Strength of Steel-Encased ConcreteBeam-Columns[J].Journal of Structural Division,ASCE,1967,93(ST5):113-124.
[9]蔡绍怀,焦占拴.钢管混凝土短柱的基本性能和强度计算[J].建筑结构学报,1984,5(6):13-29.
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[12]龙跃凌,蔡健.带约束拉杆L形钢管混凝土短柱轴心受压性能的试验研究[J].华南理工大学学报(自然科学版),2006,34(11):87-92.
[2]韩林海.钢管混凝土结构——理论与实践[M].北京:科学出版社,2004.
[3]陈兆基,林兆富.广州新中国大厦试验模型动力计算分析[J].世界地震工程,2002,(3):102-105.
[4]洪三全.广州新中国大厦特大型地下室逆作法基坑维护结构设计与施工[J].广东土木与建筑,2001,(10):24-27.
[5]陈宗弼,陈星,叶群英,等.广州新中国大厦结构设计[J].建筑结构学报,2000,(3):2-9.
[6]刘威.钢管混凝土局部受压时的工作机理研究[D].福州:福州大学,2005.
[7]Susantha K A S,Ge H B,Usami T.ConfinementEvaluation of Concrete-filled Box-shaped SteelColumns[J].Steel and Composite Structure,2001,(3):313-328.
[8]Furlong R W.Strength of Steel-Encased ConcreteBeam-Columns[J].Journal of Structural Division,ASCE,1967,93(ST5):113-124.
[9]蔡绍怀,焦占拴.钢管混凝土短柱的基本性能和强度计算[J].建筑结构学报,1984,5(6):13-29.
[10]陈明德.带约束拉杆异形钢管混凝土柱力学性能的基础研究[D].广州:华南理工大学,2000
[11]黎志军,蔡健.带约束拉杆异形钢管混凝土力学性能的试验研究[J].工程力学,2001,(s1):124-129.
[12]龙跃凌,蔡健.带约束拉杆L形钢管混凝土短柱轴心受压性能的试验研究[J].华南理工大学学报(自然科学版),2006,34(11):87-92.
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