Finite Element Analysis on Behavior of Reinforced Hollow High Strength Concrete Filled Square Steel Tube Short Columns under Axial Compression
Finite Element Analysis on Behavior of Reinforced Hollow High Strength Concrete Filled Square Steel Tube Short Columns under Axial Compression
复制标题
钢筋空心高强混凝土方钢管短柱轴压性能有限元分析
DOI：
10.1088/1742-6596/2101/1/012059
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发表时间：
2021-11
期刊：
影响因子：
--
通讯作者：
Peng Shucun
中科院分区：
文献类型：
--
作者：
Yang Zhijian;Li Xu;Li Guochang;Peng Shucun
空心钢管混凝土构件主要应用于输变电结构中，但在复杂受力的上部结构中，空心钢管混凝土构件承载力较低，易发生脆性破坏。为提高空心方钢管混凝土构件的受力性能，提出了一种新型配筋空心方钢管高强混凝土（RHCFSST），并对其轴压性能进行了研究。利用有限元分析软件ABAQUS建立了18个RHCFSST轴压短柱的有限元分析模型。研究了组合柱的受力全过程，并进行了参数研究，分析了构件的受力性能。改变了钢筋强度、含钢率、变形钢筋和夹层混凝土强度等参数。根据模拟结果，构件的受力过程可分为四个阶段：弹性阶段、弹塑性阶段、下降阶段和缓和阶段。随着用钢强度、含钢率、夹层混凝土强度的提高以及异形钢筋的增加，构件的极限承载力也随之提高。此外，这些参数的增加将提高构件的延性，除了夹层混凝土强度。
Hollow concrete-filled steel tubular (CFST) member is mainly adopted in power transmission and transformation structures, but when it is used in the superstructure with complex stress, the hollow CFST member has a low bearing capacity and is prone to brittle failure. To improve the mechanical performance of hollow CFST members, a new type of reinforced hollow high strength concrete-filled square steel tube (RHCFSST) was proposed, and its axial compression performance was researched. 18 finite element analysis (FEA) models of axially loaded RHCFSST stub columns were established through FEA software ABAQUS. The whole stress process of composite columns was studied, and parametric studies were carried out to analyze the mechanical performance of the member. Parameters of the steel strength, steel ratio, deformed bar and sandwich concrete strength were varied. Based on the simulation results, the stress process of members can be divided into four stages: elastic stage, elastoplastic stage, descending stage and gentle stage. With the increase of steel strength, steel ratio, the strength of sandwich concrete and the addition of deformed bars, the ultimate bearing capacity of members also increases. Additionally, the increment of those parameters will improve the ductility of the member, except for the sandwich concrete strength.
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