Three-Dimensional Analysis of Soil-Pile-Structure Interaction Problem on High Rise Building on Improved Soft Soil

Tipsunavee, Thanapon

doi:10.21660/2021.88.gxi293

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…One of the ground improvement methods that is widely used in Thailand is the cement-mixing ground improvement method [36,37]. The cement-mixing ground improvement can increase the lateral pile resistance, resulting in reducing the effect of SPSI and minimizing the gap separation between the pile and the surrounding soil [38,39].…”

Section: Numerical Investigation Of Spsi With Ground Improvementmentioning

confidence: 99%

Numerical Analysis on Effects of Soil Improvement on Pile Forces on Existing High-Rise Building

2023

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Nowadays, seismic codes are regularly updated with new knowledge and a better understanding of the earthquake phenomenon. With these updates, existing buildings require a reevaluation of their stability and a process of reinforcement and/or retrofitting. This study investigated the effects of two types of ground improvement which use cement-mixing soil surrounding the foundation structure to reduce and redistribute forces acting on piles. This is especially important when the reevaluation of high-rise buildings leads to increased forces in the piles. Typically, buildings are designed while assuming fixed base boundary conditions at the foundation level, without considering soil–pile–structure interaction (SPSI). SPSI significantly influences the response of high-rise buildings supported by soft soil. Increasing the lateral resistance of the surrounding soil can reduce the influence of SPSI. In this study, a detailed dynamic numerical analysis was used to investigate the dynamic response of an SPSI system of a high-rise building under seismic load. A dynamic analysis was conducted on a modified layout of a real building, using real-time earthquake motion. The finite element program DIANA FEA was used to perform nonlinear 3D FEM numerical simulations, taking into account the essential SPSI phenomena, gap-slip between the piles and the soil, and free-field boundary conditions. A comparison of the data suggests that the bending moment and shear forces in the piles are reduced in magnitude and evenly distributed along the upper part of the pile, which reduces the stress concentration of the bending moment and shear forces at the contact between the piles and the pile cap.

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Section: Numerical Investigation Of Spsi With Ground Improvementmentioning

confidence: 99%

Numerical Analysis on Effects of Soil Improvement on Pile Forces on Existing High-Rise Building

2023

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Numerical Modeling of a Pile Group Subjected to Seismic Loading Using the Hypoplasticity Model

Jawad

Albusoda²

2022

Eng. Technol. Appl. Sci. Res.

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Various simple and complicated models have been utilized to simulate the stress-strain behavior of the soil. These models are used in Finite Element Modeling (FEM) for geotechnical engineering applications and analysis of dynamic soil-structure interaction problems. These models either can't adequately describe some features, such as the strain-softening of dense sand, or they require several parameters that are difficult to gather by conventional laboratory testing. Furthermore, soils are not completely linearly elastic and perfectly plastic for the whole range of loads. Soil behavior is quite difficult to comprehend and exhibits a variety of behaviors under various circumstances. As a result, a more realistic constitutive model is needed, one that can represent the key aspects of soil behavior using simple parameters. In this regard, the powerful hypoplasticity model is suggested in this paper. It is classified as a non-linear model in which the stress increment is stated in a tonsorial form as a function of strain increment, actual stress, and void ratio. Eight material characteristics are needed for the hypoplastic model. The hypoplastic model has a unique way to keep the state variables and material parameters separated. Because of this property, the model can implement the behavior of soil under a variety of stresses and densities while using the same set of material properties.

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Three-Dimensional Analysis of Soil-Pile-Structure Interaction Problem on High Rise Building on Improved Soft Soil

Cited by 2 publications

References 9 publications

Numerical Analysis on Effects of Soil Improvement on Pile Forces on Existing High-Rise Building

Numerical Analysis on Effects of Soil Improvement on Pile Forces on Existing High-Rise Building

Numerical Modeling of a Pile Group Subjected to Seismic Loading Using the Hypoplasticity Model

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