Estimation of axial stiffness on existing and reinforcing piles in vertical extension remodeled buildings

Dohyun Kim, Jaehong Kim, Sangseom Jeong

Research output: Contribution to journalArticle

Abstract

In this study, the load distribution ratio (LDR) and axial stiffness of reinforcing piles in vertical extension remodeling structure will be investigated through numerical calculation and case studies. By comparing the results between existing and reinforcing piles, the efficiency of the reinforcing piles will be observed. To further understand the LDR of piles, the effect of elastic modulus of raft, pile end-bearing condition, raft rigidity, and the relative position of reinforcing pile in a group were investigated by using 3D FE analysis. The numerical model was validated based on actual field measurements. In addition, the method in estimating the axial stiffness of reinforcing piles (Kvr) was presented which is based on (1) the axial stiffness of existing piles (Kve) by using the 3D computer-based method, YSPR (Yonsei Piled Raft), and (2) by reducing the axial stiffness of existing piles by considering the aging and the deterioration process. The results of this can justify the necessity for settlement-based design and improvement of piled-raft foundation of vertical extension remodeling. The conclusions in this paper will significantly contribute to ensuring the safety and integrity of the structure during vertical extension remodeling process and throughout the service period.

Original languageEnglish
Article number109466
JournalEngineering Structures
Volume199
DOIs
Publication statusPublished - 2019 Nov 15

Fingerprint

Piles
Stiffness
Loads (forces)
Bearings (structural)
Rigidity
Deterioration
Numerical models
Aging of materials
Elastic moduli

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

Cite this

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title = "Estimation of axial stiffness on existing and reinforcing piles in vertical extension remodeled buildings",
abstract = "In this study, the load distribution ratio (LDR) and axial stiffness of reinforcing piles in vertical extension remodeling structure will be investigated through numerical calculation and case studies. By comparing the results between existing and reinforcing piles, the efficiency of the reinforcing piles will be observed. To further understand the LDR of piles, the effect of elastic modulus of raft, pile end-bearing condition, raft rigidity, and the relative position of reinforcing pile in a group were investigated by using 3D FE analysis. The numerical model was validated based on actual field measurements. In addition, the method in estimating the axial stiffness of reinforcing piles (Kvr) was presented which is based on (1) the axial stiffness of existing piles (Kve) by using the 3D computer-based method, YSPR (Yonsei Piled Raft), and (2) by reducing the axial stiffness of existing piles by considering the aging and the deterioration process. The results of this can justify the necessity for settlement-based design and improvement of piled-raft foundation of vertical extension remodeling. The conclusions in this paper will significantly contribute to ensuring the safety and integrity of the structure during vertical extension remodeling process and throughout the service period.",
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Estimation of axial stiffness on existing and reinforcing piles in vertical extension remodeled buildings. / Kim, Dohyun; Kim, Jaehong; Jeong, Sangseom.

In: Engineering Structures, Vol. 199, 109466, 15.11.2019.

Research output: Contribution to journalArticle

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