Browse > Article
http://dx.doi.org/10.7843/kgs.2018.34.12.133

Lateral Behavior of Hybrid Composite Piles Using Prestressed Concrete Filled Steel Tube Piles  

Park, No-Won (Dept. of Civil Engrg., Univ. of Seoul)
Paik, Kyu-Ho (Dept. of Civil Engrg., Catholic Kwandong Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.34, no.12, 2018 , pp. 133-143 More about this Journal
Abstract
Concrete filled steel tube (PCFT) piles, which compose PHC piles inside thin steel pipes, were developed to increase the flexural strength of the pile with respect to the horizontal load. In order to compare the flexural strength of PCFT pile with that of steel pipe pile, several flexural tests were performed on the PCFT and steel pipe piles with the same diameter and the P-M curves for both piles were constructed by the limit state design method. Four test piles were also installed and lateral pile load tests were performed to compare the lateral load capacities and lateral behaviors of the hybrid composite piles using PCFT piles and the existing piles such as HCP and steel pipe piles. The flexural test results showed that the flexural strength of PCFT piles was 18.7% higher than that of steel pipe piles with thickness of 12mm and the same diameter, and the mid-span deflection of piles was 50% lower than that of steel pipe piles at the same bending moment. From the P-M curves, it can be seen that the flexural strength of PCFT piles subjected to the vertical load is greater than that of steel pipe piles, but the flexural strength of PCFT piles subjected to the pullout load is lower than that of steel pipe piles. In addition, field pile load tests showed that the PCFT hybrid composite pile has 60.5% greater lateral load capacity than the HCP and 35.8% greater lateral load capacity than the steel pipe pile when the length of the upper pile in hybrid composite piles was the same.
Keywords
PCFT pile; Hybrid composit pile (HCP); Flexural test; P-M curve; Field pile load test; Lateral load capacity;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Bang, J.W., Hyun, J.H., Lee, B.Y., Lee, S.S., and Kim, Y.Y. (2013), "Flexural Strength of PHC Pile Reinforced with Infilled Concrete, Transverse and Longitudinal Reinforcements", Journal of the Korea Concrete Institute, Vol.25, No.1, pp.91-98.   DOI
2 Davidson, H. L., Cass, P. G., Khilji, K. H., and McQuade, P. V. (1982), Laterally loaded drilled pier research, Report EL-2197, EPRI, 324p.
3 Hyun, J.W., Bang, J.W, Lee, S.S., and Kim, Y.Y. (2012), "Shear Strength Enhancement of Hollow PHC Pile Reinforced with Infilled Concrete and Shear Reinforcement", Journal of the Korean Society of Civil Engineers, Vol.24, No.1, pp.71-78.
4 KBSS (2015), Korea highway bridge design code (Limit state design), Korean Bridge and Structure Society.
5 KS F 4306 (2014), Pre-tensioned spun high strength concrete piles, 53p.
6 KGS (2015), Structural foundation design code, Korean Geotechnical Society, 894p.
7 KSSC (2018), Korean steel structure design code and commentary (load and resistance factor design), Korean Society of Steel Construction, 463p.
8 Meyerhof, G. G., Mathur, S. K., and Valsangkar, A. J. (1981), "Lateral Resistance and Deflection of Rigid Wall and Piles in Layered Soils", Canadian Geotechnical J., Vol.18, pp.159-170.   DOI
9 Paik, K.H. (2018), "Strength Characteristics of Hollow Prestressed Concrete Filled Steel Tube Piles for Hybrid Composite Piles", Journal of the Korean Geotechnical Society, Vol.34, No.1, pp.37-46.   DOI
10 Piletech, Doosan Heavy Industries & Const., Hanmac Esng. and Korea Eng. Consultants (2008), Design and construction methods of bored hybrid composite pile that joins steel pipe and PHC piles using coupler, New Excellent Technology No. 556.
11 WSDOT, Structural design recommendations of CFT and RCFT for bridge foundation, Washington State DOT Design Memorandum, 30p.