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Test on axial compression performance of nano-silica concrete-filled angle steel reinforced GFRP tubular column
- Source :
- Nanotechnology Reviews, Vol 8, Iss 1, Pp 523-538 (2019)
- Publication Year :
- 2019
- Publisher :
- Walter de Gruyter GmbH, 2019.
-
Abstract
- This paper attempts to investigate the effect of various parameters on the axial compressive behavior of nano-silica concrete-filled angle steel reinforced GFRP tubular columns. The proposed new composite column consists of three parts: the outer GFRP tube, the inner angle section steel and the nano-silica concrete filled between GFRP tube and angle section steel. Twenty-seven specimens with different nano-silica concrete compressive strength (20MPa, 30MPa and 40MPa), diameter-to-thickness ratio of GFRP tube (20, 25 and 40) and steel ratio (0.008, 0.022 and 0.034) were tested under axial load. The main purpose of this study is to examine the effect of the three parameters on the following: failure modes, deformation capacity, load bearing capacity, ductility and initial stiffness of the new composite column under axial load. It was found that the load bearing capacity and initial stiffness increased as the nano-silica concrete compressive strength of the specimens increased. But the specimens with higher nano-silica concrete compressive strength showed lower deformation capacity than that of the specimens with lower nano-silica concrete compressive strength. The varieties of the steel ratio have no significant effect on the specimens’ axial deformation behavior. Experimental results also showed that both load bearing capacity and deformation capacity increased with the decrease of diameter-to-thickness ratio of GFRP tube. However, diameter-to-thickness ratio of GFRP tube has no significant effect on the initial stiffness of specimens. The confinement coefficient was proposed to better evaluate the confinement effect of GFRP tube on the inner angle section steel reinforced core nano-silica concrete. The confinement effect of GFRP tube on lower strength concrete was better, and the confinement effect reduced as the diameter-to-thickness ratio of GFRP tube increased. The design formulas for the load bearing capacity of the nano-silica concrete-filled angle steel reinforced GFRP tubular columns under axial load were proposed.
- Subjects :
- Technology
Materials science
Physical and theoretical chemistry
QD450-801
0211 other engineering and technologies
Energy Engineering and Power Technology
Medicine (miscellaneous)
020101 civil engineering
TP1-1185
02 engineering and technology
steel ratio
Column (database)
axial load
0201 civil engineering
Biomaterials
Axial compression
021105 building & construction
Nano
Composite material
gfrp
compressive behavior
Chemical technology
Process Chemistry and Technology
angle section steel
technology, industry, and agriculture
Fibre-reinforced plastic
Surfaces, Coatings and Films
nano-silica concrete
Biotechnology
Subjects
Details
- ISSN :
- 21919097
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- Nanotechnology Reviews
- Accession number :
- edsair.doi.dedup.....a470e7dece4a7d239b15189883350a9e