Conventional steel and concrete piles are widely applied in civil engineering industries with long time experience and many advantages. However, steel pipe piles, a sort of most common steel pile, are prone to losing their structural integrity over time due to corrosive and humid conditions. Moreover, concrete piles such as in-situ concrete piles and pretensioned spun high strength concrete (PHC) piles are subject to deterioration of their long-term structural durability. Therefore, Hybrid FRP-concrete composite pile (HCFFT) was developed. HCFFT is consisted of pultruded FRP (PFRP) unit module, filament winding FRP which is in the outside of mandrel composed of circular shaped assembly of PFRP unit modules, and concrete which is casted inside of the circular tube shaped hybrid FRP pile. Therefore, PFRP can increase the flexural load carrying capacity, while filament winding FRP and concrete filled inside can increase axial load carrying capacity. In this paper, field loading experiments were conducted to evaluate field bearing capacity of HCFFT pile with connection and HCFFT pile without connection.

ABSTRACT
 1. 서 론
 2. 말뚝의 지지력 산정방법
 3. 현장재하실험
 4. 결과 분석
 5. 결 론
 References

• 서재훈(홍익대학교 토목공학과) | Seo Jae-Hoon
• 김학군(홍익대학교 토목공학과) | Kim Hak-Goon
• 김선희(홍익대학교 토목공학과) | Kim Sun-Hee
• 유종호(홍익대학교 토목공학과) | Yoo Jong-Ho
• 윤순종(홍익대학교 토목공학과) | Yoon Soon-Jong