Study of the influence of finite element mesh refinement on the calculated bearing behaviour of a piled raft

Reul, Oliver; Randolph, Mark

doi:10.1201/9781439833797-c38

Cited by 10 publications

(6 citation statements)

References 1 publication

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“…As stated by Potts and Zdrakovic (2000), although the load settlement behavior is dominated by the interface element stiffness,(,measuring the interface stiffness being difficult), instead of using higher stiffness values, it was suggested not to use interface elements, as this is acceptable when the analyses was done with only vertical loading. It was observed by Reul and Randolph (2002) mesh refinement does not have any appreciable effect the study was done with relatively coarser mesh. 10 provides the finite element model and the mesh.…”

Section: Numerical Analysesmentioning

confidence: 94%

A study on the behavior of pile supported footings on sand

Balakumar¹,

Huang

et al. 2019

Lecture Notes in Civil Engineering

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When the bearing capacity is not adequate to provide isolated footings, columns are grouped and supported combined footing. However if the settlement increases beyond the permissible limits, piles are provided below the combined footing, applying the concept of piled raft. In this case the piles function as settlement reducers. Such systems can be categorized as a particular case of the combined piled raft system. In the present study a typical case of a piled raft with relatively smaller width, supported on two rows of piles on the edges was studied with small scale 1g model tests for understanding the basic behavior and a numerical study to obtain the details of raft settlement and the shaft stress distribution along the pile length.

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Section: Numerical Analysesmentioning

confidence: 94%

A study on the behavior of pile supported footings on sand

Balakumar¹,

Huang

et al. 2019

Lecture Notes in Civil Engineering

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“…Thus consolidation effects have been neglected. As shown in Reul (2002), the consolidation has only minor effects on the final settlements and load distribution between piles and raft. The material behavior of the piles and the raft was simulated as linear elastic in the FE analysis, whereas for the simulation of the material behavior of the soil the elasto-plastic cap model as implemented in ABAQUS was used ( Figure 8).…”

Section: Materials Modelsmentioning

confidence: 95%

Assessing Settlement of High‐Rise Structures by 3D Simulations

Katzenbach

Schmitt

Turek

2005

Computer aided Civil Eng

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A number of new high-rise buildings in the Frankfurt region are currently in their planning stage. Most of these high-rise structures will be erected on combined piled-raft foundations (CPRFs). Due to the complex interaction between piles, raft, and subsoil the difficult design of these foundations will be carried out by three-dimensional finite-element (FE) simulations. For the 121 m high CITY-TOWER, which is currently under construction, the design procedure based on a threedimensional FE simulation of the CPRF is described. The design process for the new 228 m high office tower MAX, which will be located in the financial district of Frankfurt, in the direct vicinity of already existing high-rise buildings, has just started. To improve and verify the input parameters for the constitutive modeling and to allow for a cost optimized foundation design, a numerical back-analysis of the 110 m high EUROTHEUM, located close to the building site of MAX, has been performed. For this building comprehensive measurements were carried out starting in the construction stage and lasting up to the present day.

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“…Numerical methods were implemented by Katzenbach et al (1998), Chow et al (2001), Reul (2002), Lee et al (2002), Lee & Ng (2004), El-Mossallamy (2011), Cho et al (2012), Rodríguez-Rebolledo et al (2015, Khanmohammadi & Fakharian (2018) and Mali & Singh (2018), among others. These studies focused on analysing the soil-structure interaction, the load distribution, the potential failure surfaces along the shaft and the settlements of the PRFS or group of piles.…”

Section: Prfs In Soft Soilsmentioning

confidence: 99%

Comparative analysis of Piled Raft Foundation System (PRFS) settlements placed on soft soils via geotechnical centrifuge

Rincón¹,

Caicedo²,

Rebolledo³

2021

S&R

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The use of Piled Raft Foundations Systems (PRFS) has been extended to different types of soils, including soft clay soils. In this type of soil it is possible that, in addition to the consolidation process due to the presence of loads, a subsidence process is generated, associated with variations in pore pressure with depth. In many cases, these variations are associated with the loss of recharge of the aquifers or with the extraction of water from deep soil layers. In this work, the behaviour of some PRFS built on soft clay soils, which are subjected to the double consolidation process, are evaluated, both by loading and by the extraction of water from deep soil layers. The research is based on the implementation of reduced-scale models in a geotechnical centrifuge; the influence of the separation and number of piles on the deformation or settlement of the system is analysed. It is shown that, normally, groups of piles with greater separation control settlement more effectively. However, the settlements are greater when the soil is subjected to the weight of the structure in addition to a process of depletion of the pore pressure, because the settlement depends on the distribution of the piles, which is described using the Filling Factor (FF).

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Study of the influence of finite element mesh refinement on the calculated bearing behaviour of a piled raft

Cited by 10 publications

References 1 publication

A study on the behavior of pile supported footings on sand

A study on the behavior of pile supported footings on sand

Assessing Settlement of High‐Rise Structures by 3D Simulations

Comparative analysis of Piled Raft Foundation System (PRFS) settlements placed on soft soils via geotechnical centrifuge

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