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Title |
Flexural Design and Experiments on Reinforced Concrete Filled PHC Pile
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Authors |
김정회(Jeong-Hoi Kim) ; 정해광(Hae-Kwang Jung) ; 박영식(Young-Shik Park) ; 민창식(Chang-Shik Min) |
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DOI |
https://doi.org/10.4334/JKCI.2017.29.4.353 |
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Keywords |
CFP pile ; P-M interaction curve ; flexural experiment ; PHC pile |
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Abstract |
The objective of this study is theoretical and empirical evaluation of the flexural performance of concrete filled pretensioned spun high strength concrete pile with ring type composite shear connectors (CFP pile). The specimens are comprised of standard CFP pile, PHC pile+composite shear connector+filed concrete (CFP-N-N), standard CFP pile with 1st reinforcements (H13-8ea), and standard CFP pile with 1st and 2nd reinforcements(H19-8ea). Flexural performance evaluation results showed that the ductility is improved with increased steel ratio, which leads to the increased maximum load by 46.4% (with 1st reinforcement) and 103.9% (with 1st and 2nd reinforcements) compared to standard CFP ( CFP-N-N). Comparing with the predicted ultimate limit state values of the CFP pile design method and the experimental results, the design method presented in this study is reasonable since safety factor of 1.23 and 1.40 times for each reinforcement step are secured.
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