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http://dx.doi.org/10.7843/kgs.2018.34.1.37

Strength Characteristics of Hollow Prestressed Concrete Filled Steel Tube Piles for Hybrid Composite Piles  

Paik, Kyu-Ho (Dept. of Civil Engrg., Catholic Kwandong Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.34, no.1, 2018 , pp. 37-46 More about this Journal
Abstract
Hollow prestressed concrete filled steel tube (HCFT) piles, which compose hollow PHC piles inside thin wall steel tubes, are developed. In order to investigate the strength characteristics of HCFT piles, flexural and shear tests were conducted on HCFT piles as well as PHC and steel pipe piles with the same diameter. Results of the test program showed that the flexural strength of HCFT piles was 2.88 and 1.19 times those of ICP and steel pipe piles with thickness of 12 mm, respectively, and its shear strength was 2.40 times that of steel pipe piles. The shear key attached to the inside of thin wall steel tube did not affect the flexural behavior of HCFT piles. It was also observed that the flexural strengths of HCFT piles with diameters of 450 and 500 mm were 35 to 63% higher than the sum of the flexural strengths of its components, respectively, because the strength of concrete in compressive zone increased by confining effect of thin wall steel tube on concrete. HCFT piles used as upper piles in hybrid composite piles might decrease the lateral displacement and increase the structural safety of structures subjected to lateral loads.
Keywords
Hollow concrete filled steel tube pile; Hybrid composite pile; Flexural strength; Shear strength; Full-scale laboratory test;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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