Behavior of Concrete Confined with GFRP According to the Fiber Volume, Diameter and Length

복합소재 부재에서 섬유의 양과 시편의 크기에 따른 콘크리트 구속모델

The behavior of stocky concrete-filled glass fiber reinforced polymer(GFRP) tubes was studied experimentally and analytically The behavior is focused on the confining action of GRFP tube against concrete. In the experimental work, extensive tensile tests for GFRP tubes which have various fiber lay-out were conducted. And, also short length concrete filled GFRP tubes which have various tube thickness, diameter, and length were tested. In the analytical work, equations to describe the compressive stresses and strains at failure, as well as the entire stress-strain curve of the GFRP tubes were developed. A comparison between the experimental results and those of analytical results indicate that the proposed model provides satisfactory predictions for the compressive strengths, strains at failure, and stress-strain responses.