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http://dx.doi.org/10.7843/kgs.2019.35.12.35

Estimation of the Axial Stiffness of Reinforcing Piles in Vertical Extension Structures  

Kim, Do-Hyun (Dept. of Civil and Environmental Engrg., Massachusetts Institute of Technology)
Jeong, Sang-Seom (Dept. of Civil and Environment Engrg., Yonsei Univ.)
Cho, Hyun-Chul (Hyundai Engineering and Construction)
Publication Information
Journal of the Korean Geotechnical Society / v.35, no.12, 2019 , pp. 35-44 More about this Journal
Abstract
In this study, the axial stiffness of reinforcing piles (Kvr) for the vertical extension remodeling structures was estimated through 3D finite element analysis. In the computation of the minimum required axial stiffness of reinforcing piles, proposed maximum axial stiffness of old and deteriorated existing piles (Kve) based on theoretical and experimental approaches will be applied. Through this, the required increase rate of axial stiffness of reinforcing piles in order to support the increased structural loading was proposed for end-bearing and friction piles by different slenderness ratio (L/D). The numerical model was validated by comparing the computed results with actual field measurements. Based on the computed results, it was concluded that the end-bearing reinforcing pile needs 44% - 67% increase in axial stiffness to deal with the deterioration of existing piles and support the additional structural load due to vertical extension remodeling.
Keywords
Axial stiffness; Numerical analysis; Reinforcing pile; Piled-raft foundation; Pile deterioration; Vertical extension remodeling;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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