Experimental research on concrete-filled square steel tubular slender columns with inner I-shaped CFRP under axial compression

被引：0
|
作者：
Li G. [1 ]
Zhu Z. [1 ]
Sun X. [1 ]
Liu X. [1 ]
Han Y. [1 ]
机构：
[1] School of Civil Engineering, Shenyang Jianzhu University, Shenyang
来源：
| 1600年 / Science Press卷 / 38期
关键词：
Bearing capacity; Concrete-filled square steel tube; Finite element analysis; I-shaped CFRP; Long column under axial compression; Static test;
D O I：
10.14006/j.jzjgxb.2017.S1.031
中图分类号：
学科分类号：
摘要：
Seven concrete-filled square steel tubular slender (CFST) columns with inner I-shaped CFRP have been tested under axial compression. Load-strain curves and load-mid-span deflection curves were obtained. The failure mode and the loading process were analyzed. The experimental results show that the failure mode of slender CFST columns with inner I-shaped CFRP is bending instability failure. The bearing capacity of specimens is decreased with the increase of slenderness ratio. The load-deflection curve can be divided into three stages of elastic stage, elasto-plastic stage and decline stage. The finite element simulation of slender CFST columns with inner I-shaped CFRP under axial compression was carried out by using software ABAQUS. The simulation results were in good agreement with the experimental results. On this basis, the effects of slenderness ratio, concrete strength, steel strength, steel ratio and inner I-shaped CFRP on mechanical behavior were analyzed. The results show that the slenderness ratio has obvious effect on the mechanical behavior. With the increase of slenderness ratio, the bearing capacity decreases quickly. With the increase of concrete strength, the bearing capacity increases, but the ductility reduces. With the increase of steel strength and steel ratio, the bearing capacity increases. It can be found that the presence of I-shaped CFRP could increase the bearing capacity and ductility of columns. © 2017, Editorial Office of Journal of Building Structures. All right reserved.
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页码：226 / 232
页数：6
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