Estimation of the Load Sharing Ratio of Pre-installed Columns in Top-Down Buildings on Korean Rock

Jeong, Sangseom; Kim, Do-Hyun

doi:10.1007/s12205-017-1102-z

Cited by 7 publications

(5 citation statements)

References 13 publications

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“…Most of the unified analysis based on the FE method provides wide range of methods and tools that are capable of modeling the superstructure, soil continuity and nonlinearity, soil-structure interface behavior, and boundary conditions. [15][16][17][18][19] However, full threedimensional analyses are usually inconvenient due to the large scale of superstructure-foundation-soil systems. This is because the mesh becomes massive and complicated, which causes long computation time when calculating the SSI problem as a whole structure-foundationsoil system.…”

Section: Discussionmentioning

confidence: 99%

“…Studies on load distribution ratio of piled raft foundation have been conducted intensively, due to the effectiveness of the piled raft foundation on bearing capacity and settlement limitations . The significance of this investigation is that the load distribution ratio affects the design of the piled raft foundation system on various structural elements, such as the thickness of the raft, pile length, pile diameter, pile spacing, and pile array.…”

Section: Load Distribution Ratiomentioning

confidence: 99%

“…Hora suggested the computational methodology for nonlinear SSI analysis of an infilled frame–foundation–soil system. Most of the unified analysis based on the FE method provides wide range of methods and tools that are capable of modeling the superstructure, soil continuity and nonlinearity, soil–structure interface behavior, and boundary conditions . However, full three‐dimensional analyses are usually inconvenient due to the large scale of superstructure–foundation–soil systems.…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of load distribution ratio of various piled raft foundations based on coupled stiffness matrix

Kim

Jeong

2019

Structural Design Tall Build

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Load distribution ratio of piled raft foundation was investigated based on an interactive foundation analytical method that considers the coupling effect between the stiffness of the superstructure, the piled raft, and the soil. Series of numerical analysis was performed to verify the proposed analytical routine in comparison with various methods and field measurements. Through the comparative studies between various piled rafts with different aspects, it was found that the proposed analytical method derived accurate results in structural response compared with actual field data, in settlement, load distribution ratio, and raft bending moment. And it was also found that the proposed analytical method was capable of considering interaction between superstructure and foundation in predicting the behavior of building structures. As a result, it was found that in most cases, the pile in the piled raft foundation supports a majority portion of the structural load. However, for cases where the length of the pile was short and acts as a short column, the load distribution ratio between raft and pile may be overturned and shows significantly different behavior and load distribution ratio. KEYWORDS case histories, coupled stiffness matrix (CSM), iterative and interactive analysis, load distribution ratio, piled raft foundations, superstructure

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Section: Discussionmentioning

confidence: 99%

Section: Load Distribution Ratiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparative study of load distribution ratio of various piled raft foundations based on coupled stiffness matrix

Kim

Jeong

2019

Structural Design Tall Build

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“…Once the displacements and material data, in the form of deformation modules, are known, it is possible to determine the stresses. The determination of stresses allows verifying the behavior of the structure; thus, it is possible to check on an ongoing basis that the allowable stresses are not exceeded, which may lead to a construction disaster [22]. Another well-known method is the installation of inclinometers into diaphragm walls.…”

Section: Hazards Occurring During Deep Excavation Executionmentioning

confidence: 99%

Hazard Reduction in Deep Excavations Execution

2022

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In this article, the authors consider a completely new approach in design, which is related to the use of previously un-adapted technologies known to bridge engineering in geotechnical issues for prestressing of diaphragm wall during deep excavations execution. The bridge technology described here is the prestressing of concrete structures. Hazards related to deep excavations and methods of digging them, such as the ceiling method and top&down method, are presented. Current problems in supporting deep excavation slopes are related to the use of extensive quantities of materials (such as steel struts, ground anchors, or concrete and reinforcement steel). The authors’ method helps to achieve a higher level of sustainability, which is important in a modern approach to geotechnical engineering. The non-linear arrangements of the cables according to the occurrence of the prestressing moments for a given phase are presented. Results related to numerical analysis—showing the correctness of the method and cost optimization results, showing possible savings are presented. The article is a part of the set. In the second (already published) article titled “Modern Methods of Diaphragm Walls Design”, the authors present the concept of the calculation methodology for diaphragm wall design.

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“…While it is possible to design a compression cable, this is an underdeveloped and extremely limited function that works only under strictly defined conditions that, from a practical point of view, do not allow it to be used in industry. Practically speaking, sensors may be implemented in diaphragm walls to gather real data on internal forces [23][24][25]. It is also impossible to analyze the structure from the point of view of the prestressed structure, thus it is impossible to select an appropriate prestressing system or calculate the prestressing losses while checking cracks or other necessary standard conditions of the diaphragm wall itself.…”

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confidence: 99%

Modern Methods of Diaphragm Walls Design

2021

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This article addresses hazard reduction in deep excavations. The authors present a possible combination of prestressing of concrete structures (from bridge engineering) and prestressed structures of diaphragm walls from geotechnical engineering science. This innovative concept has not yet been shown in scientific articles. The “Sofistik” software (with TENDON module–SYSP/AXES/TOPP/TGEO) and its use is shown, with graphical presentations of the suggested solution. The authors compare the provided solution through usage of Sofistik and Plaxis software. The results show possible strengthening of sustainable construction by limitation of hazards and decreasing costs (via limitation of use of expensive steel reinforcement).

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Estimation of the Load Sharing Ratio of Pre-installed Columns in Top-Down Buildings on Korean Rock

Cited by 7 publications

References 13 publications

Comparative study of load distribution ratio of various piled raft foundations based on coupled stiffness matrix

Comparative study of load distribution ratio of various piled raft foundations based on coupled stiffness matrix

Hazard Reduction in Deep Excavations Execution

Modern Methods of Diaphragm Walls Design

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