Experimental Research on Static Behavior of Stiffened T-Shaped Concrete-Filled Steel Tubular Stubs Subjected to Concentric Axial Loading
Experimental Research on Static Behavior of Stiffened T-Shaped Concrete-Filled Steel Tubular Stubs Subjected to Concentric Axial Loading
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DOI：
10.1007/s13296-018-0145-4
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发表时间：
2018-08
影响因子：
1.5
通讯作者：
Chuangze Xu;Yuanlong Yang;X. Tang;Jiepeng Liu
中科院分区：
文献类型：
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作者：
Chuangze Xu;Yuanlong Yang;X. Tang;Jiepeng Liu
本文对8根加劲t形钢管混凝土柱和1根非加劲t形钢管混凝土柱进行了轴压荷载试验。对试件的力学性能和破坏模式进行了研究。研究了配钢比、混凝土强度和截面尺寸对试件轴压性能的影响。根据试验结果，编制了计算t形钢管混凝土柱同心荷载缩短曲线的数值程序。在计算程序中考虑了t形截面的约束混凝土分布和加筋管的局部屈曲。计算结果与实验结果吻合较好。在此基础上，提出了考虑加劲肋有利作用的加劲t形钢管混凝土柱承载力设计公式。
Eight stiffened T-shaped concrete-filled steel tubular (CFST) columns and one non-stiffened T-shaped CFST column were tested subjected to axial compressive load in this paper. The mechanical property and failure mode of the specimens were studied. The influences of steel ratio, concrete strength and sectional size were investigated on the axial compressive performance of the specimens. A numerical program was developed to calculate concentric load-shortening curves of T-shaped CFST columns based on experimental results. The confined concrete distribution in T-shaped section and the stiffened tube’s local buckling were considered in the numerical program. A good agreement between calculating results and experimental results was obtained. Besides, a design formula of bearing capacity of stiffened T-shaped CFST columns was put forward by considering favorable effect of stiffeners.