• Title/Summary/Keyword: 증축(增築)

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Estimation of the Axial Stiffness of Reinforcing Piles in Vertical Extension Structures (수직증축 공동주택 하부 신설 보강말뚝의 축강성 산정)

  • Kim, Do-Hyun;Jeong, Sang-Seom;Cho, Hyun-Chul
    • Journal of the Korean Geotechnical Society
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    • v.35 no.12
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    • pp.35-44
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    • 2019
  • 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.