An Analytical Study of Square CFT Columns in Bracing Connection Subjected to Axial Loading

An Analytical Study of Square CFT Columns in Bracing Connection Subjected to Axial Loading
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支撑连接方钢管混凝土柱受轴向荷载的分析研究

DOI:
10.1155/2018/8618937
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发表时间:
2018-11
影响因子:
1.8
通讯作者:
Liu Deming
Liu Deming
中科院分区:
工程技术4区
文献类型:
--
作者:
Pan Jianrong;Wang Peng;Zheng Yanjun;Wang Zhan;Liu Deming

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本文研究了不同贯通板的方管混凝土柱在轴向荷载作用下的受力性能。研究了CFT柱的荷载传递机理,包括扣板与核心混凝土之间的荷载分配以及扣板与钢管的复合作用。试验结果表明,轴向荷载可以通过承载机构从扣板底边、肋和孔传递到核心混凝土。在扣板上增加肋或孔,可以有效地促进荷载传递,提高复合性能。建立了矩形CFT柱的轴向力分布数值模型。在此基础上,提出了带扣板的方形CFT柱弹性模量的修正系数。
This paper presents the behavior of square concrete-filled tubular (CFT) columns with different penetrating gusset plates under axial load. Load transfer mechanism in the CFT columns including load distribution between gusset plate and core concrete and composite action of the gusset plate and steel tube was investigated. Experimental results showed that the axial load can be transferred from the bottom edge, ribs, and the hole of the gusset plate to core concrete through the bearing mechanism. Adding ribs or a hole on the gusset plate can efficiently facilitate load transmission and improve the composite action. Numerical models were established to determine the distribution of axial forces among members in the square CFT column. Then, revised coefficients of elastic modulus for the square CFT column with the gusset plate were proposed.
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