초록

III. 연구개발의 내용 및 범위
▪ 파일생산 및 이용실태 조사, 분석
▪ 복합재 특성 및 내구성 분석
▪ FRP 복합재 말뚝 거동 예측
▪ 설계요소 및 예비 단면 결정
▪ 시편제작 및 구조성능 실험
▪ 양산 시스템 구축
▪ 해석모듈 및 설계기술 개발
▪ 실내모형시험
▪ 현장시험 및 적용성 평가
▪ 설계 및 시공지침 개발
▪ 경제성 평가 및 신기술 신청

Abstract ▼

Due to the advantageous mechanical properties of the fiber reinforced polymeric plastics(FRP), their application in the construction industries is ever increasing trend, as a substitute of structural steel which is highly vulnerable under hazardous environmental conditions (i.e., corrosion, humidity

Due to the advantageous mechanical properties of the fiber reinforced polymeric plastics(FRP), their application in the construction industries is ever increasing trend, as a substitute of structural steel which is highly vulnerable under hazardous environmental conditions (i.e., corrosion, humidity, etc.). As a fundamental structural element, pile is constructed to transfer loads from uperstructure to foundation. In general, since the pile foundation is constructed in the soil and/or under-water, it is difficult to maintain for the damages from moisture and/or salt. It is even more difficult to estimate its durability. Therefore, at the time of design stage of the pile foundation, durability against corrosion must be taken into account, In this study, in order to enhance the durability and constructibility of the pile foundation, FRP-concrete composite pile is developed and its applicability considering construction and economy is estimated. Existing FRP-concrete composite pile is consisted of concrete pile and filament FRP, wound outside of the pile, to improve the axial load carrying capacity as well as its durability against the flexural load carrying capacity, additional reinforcement is needed. Therefore, in this study, hybrid FRP-concrete composite pile (HCFFT) is suggested. The HCFFT is consisted of pultruded FRP unit module, filament wound FRP which is in the outside of mandrel composed of circular shaped assembly of pultmded FRP unit modules, and concrete which is casted inside of the circular tube shaped hybrid FRP pile. Therefore, pultmded FRP can increase the flexural load carrying capacity, filament wound FRP and concrete filled inside can increase axial load carrying capacity. In the research, compressive and flexural capacity of HCFFT are investigated throughout experiments. From the results of experiments, we suggested the strength estimation equations about compressive and flexural and compared with the results of the FE analysis. During the 3rd year of research, constructibility of HCFFT pile will be explored and eventually its applicability in the construction field will be estimated.

목차 Contents

• 표지 ... 1
• 제출문 ... 2
• 보고서 요약서 ... 2
• 요약문 ... 3
• SUMMARY ... 5
• CONTENTS ... 6
• 목 차 ... 7
• 제1장 연구개발과제 개요 ... 8
• 제2장 국내외 기술개발 현황 ... 11
• 2.1 콘크리트 말뚝 ... 11
• 2.2 강관말뚝 ... 19
• 2.3 복합말뚝 ... 32
• 2.4 복합소재(FRP)말뚝 ... 42
• 제3장 연구개발수행 내용 및 결과 ... 49
• Ⅰ. 섬유강화복합재 ... 49
• Ⅱ. 콘크리트 충전 FRP Tube(CFFT) ... 104
• Ⅲ. HCFFT의 구조적 거동 특성 ... 152
• Ⅳ. HCFFT의 압축강도실험 및 강도평가식 ... 186
• Ⅴ. HCFFT의 휨강도실험 및 강도평가식 ... 211
• Ⅵ. HCFFT의 연결 방안 ... 234
• Ⅶ. HCFFT의 현장재하실험 ... 253
• Ⅷ. HCFFT의 설계 및 시공 지침 제안 ... 285
• 제4장 목표달성도 및 관련분야에의 기여도 ... 316
• 제5장 연구개발결과의 활용계획 ... 320
• 제6장 연구개발과정에서 수집한 해외과학기술정보 ... 323
• 제7장 참고문헌 ... 324