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Title |
Flexural Strength of PHC Pile Reinforced with Infilled Concrete, Transverse and Longitudinal Reinforcements
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Authors |
방진욱 ; 현정환 ; 이방연 ; 이승수 ; 김윤용 |
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DOI |
https://doi.org/10.4334/JKCI.2013.25.1.091 |
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Keywords |
PHC 말뚝 ; 내부충전 콘크리트 ; 횡방향 철근 ; 축방향 철근 ; 휨강도 PHC pile ; infilled concrete ; transverse rebar ; longitudinal rebar ; flexural strength |
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Abstract |
The pre-tensioned spun high strength concrete (PHC) pile has poor load carrying capacity in shear and flexure, while showing excellent axial load bearing capacity. The purpose of this study is to evaluate the flexural performance of the concrete-infilled composite PHC (ICP) pile which is the PHC pile reinforced with infilled concrete, transverse and longitudinal reinforcement for the improvement of shear and flexural load carrying capacity. The ICP pile specimen was designed to make allowable axial compression and bending moment higher load bearing capacity than those determined through the investigation of abutment design cases. The allowable axial compression and bending moment of the ICP pile was obtained using the program developed for calculating the axial compression - bending moment interaction. Then, ICP pile specimens were manufactured and flexural tests were performed. From the test results, it was found that the maximum bending moment of the ICP pile was approximately 45% higher than that of the PHC pile and the safety factor of ICP pile design was about 4.5 when the allowable bending moment was determined to be 25% of the flexural strength.
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