| Title |
Experimental Analysis of Large Size Concrete-Filled Glass Fiber Reinforced Composite Piles Subjected to the Flexural Compression |
| Keywords |
GFRP pile;concrete filled pile;glass fiber composite;flexural compression;GFRP;FRP;콘크리트충전 복합소재 파일;유리섬유보강 폴리머 |
| Abstract |
Fiber reinforced composite materials have various advantages in mechanical and chemical aspects. Not only high fatigue and chemical resistance, but also high specific strength and stiffuess are attained, and therefore, damping characteristics are beneficial to marine piles. Since piles used for marine structures are subjected to compression and bending as well, detailed research is necessary. Current study examine the mechanical behavior under flexural and/or compressive loads using concrete filled fiber reinforced plastic composite piles, which include large size diameter. 25 pile specimens which have various size of diameters and lengths were fabricated using hand lay-up or filament winding method to see the effect of fabrication method. The inner diameters of test specimens ranged from 165 ㎜ to 600 ㎜, and the lengths of test specimens ranged from 1,350 ㎜ to 8,000 ㎜. The strengths of the fill-in concrete were 27 and 40 ㎫. Fiber volumes used in circumferential and axial directions are varied in order to see the difference. For some tubes, spiral inner grooves were fabricated to reduce shear deformation between concrete and tube. It was observed that the piles made using filament winding method showed higher flexural stiffuess than those made using hand lay-up. The flexural stiffuess of piles decreases from the early loading stage, and this phenomenon does not disappear even when the inner spiral grooves were introduced. It means that the relative shear deformation between the concrete and tube wasn"t able to be removed. |