| Title |
Structural Behavior Analysis of Vertical Extension Remodeling of Apartment Buildings with Existing Foundation and Reinforcement Pile Conditions |
| Authors |
노유진(Noh, Yu-Jin) ; 박종전(Park, Jong-Jeon) ; 고준영(Ko, Jun-Young) |
| DOI |
https://doi.org/10.5659/JAIK.2025.41.11.115 |
| Keywords |
Remodeling; Vertical extension; Foundation reinforcement; Preloading method; Finite element method |
| Abstract |
In this study, a finite element method program(PLAXIS 3D) was used to analyze the behavior of the foundation under different substructure
conditions during vertical extension remodeling. The study considered several conditions, such as raft shape, pile end-bearing condition and
reinforcing pile installation condition, including the number and location of piles. The analysis results indicated that the existing piles carried
lower axial force and load distribution ratio when reinforcing piles were installed densely nearby. In term of settlement, all four existing piles
installed beneath the raft showed nearly identical displacements due to the rigid behavior of the raft. The axial force of the pile with depth
analysis revealed that the preloading method had a greater influence when the piles were embedded in weathered rock than in sand.
Additionally, if reinforcing piles were installed without considering symmetry with existing piles, the likelihood of exceeding the allowable
bearing capacity increased. Therefore, for foundation reinforcement in vertical extensions, it is recommended that reinforcing piles be installed
densely around existing piles while maintaining symmetry, in order to ensure structural stability. |