Numerical Simulation of Deformation Pattern to Pile Raft Foundation

ABAQUS is used to study the load-settlement characteristic and soil displacement field of the pile raft foundation. Numerical results are compared to the outputs from model test. The study results show that good consistency is obtained from the comparison of results between numerical simulation and model tests. Small pile space will weaken the single pile bearing capacity. The compress region is mainly centralized in the soil beneath the pile tip to the 3b space pile raft foundation, which presents a massive deep foundation failure pattern. As the increase of pile space, the compress region under cap shifts upward. The displacement influence depth of 6b space pile foundation is smaller than 3b space pile raft foundation, and it is destroyed by the lateral squeeze of the soil around piles.

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Numerical Simulation on Overturning Behavior About Single Pile Foundation under Lateral Loadings

2013 Fifth International Conference on Measuring Technology and Mechatronics Automation ◽

10.1109/icmtma.2013.187 ◽

2013 ◽

Author(s):

Yungeng Liu

Keyword(s):

Numerical Simulation ◽

Pile Foundation ◽

Single Pile

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Numerical Analysis of the Influence of Vertical Load on the Horizontal Bearing Capacity of Single Pile

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.374-377.1947 ◽

2011 ◽

Vol 374-377 ◽

pp. 1947-1952 ◽

Cited By ~ 1

Author(s):

Zhao Yun Xiao ◽

Guo Xun Zhang ◽

Wei Xu ◽

Zhong Ming Xue

Keyword(s):

Numerical Simulation ◽

Bearing Capacity ◽

Pile Foundation ◽

Sandy Soils ◽

Single Pile ◽

Horizontal Load ◽

Clayey Soils ◽

Vertical Load ◽

Concrete Pile ◽

Finite Element Numerical Simulation

It is a complicated progress of interaction between pile and soil when pile is under both vertical load and horizontal load. This paper analyzes the variation of stress, strain, deformation and deflection of the pile body by finite element numerical simulation of single bored concrete pile under vertical load together with horizontal load. Based on the existing research results, conclusions could be that the vertical load can increase horizontal bearing capacity of the pile in sandy soils, but horizontal bearing capacity of the pile in clayey soils is more complicated. Hope that the simulation can provide some references for the design of pile foundation.

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Numerical Study for Centrifugal Model Tests of a Single Pile Foundation Installed in Sandy Deposits

Journal of Mechanics ◽

10.1017/s1727719100001441 ◽

2007 ◽

Vol 23 (4) ◽

pp. 389-398 ◽

Cited By ~ 1

Author(s):

C. W. Lu

Keyword(s):

Numerical Simulation ◽

Pile Foundation ◽

Numerical Study ◽

Computation Time ◽

Model Tests ◽

Unit Weight ◽

Single Pile ◽

3D Fem ◽

Static Tests ◽

Centrifugal Model

AbstractIt is believed that a dynamic analysis is urgently required to provide a more reliable numerical method for seismic evaluation of a full system, which includes foundation, super structure, and ground in earthquake zones such as Taiwan and Japan. A centrifugal model test of pile foundation is simulated numerically using a three-dimensional finite-element model (3D-FEM) code in this study. In the numerical simulation, parameters of the sandy soils in tij model that are derived from accumulated experiences in static tests are first calibrated by centrifugal vibration tests of sandy ground. Model tests of a single pile foundation installed in grounds of same unit weight of soil as in the static tests are then simulated using the calibrated parameters. The numerical simulation resulted in a good agreement with the corresponding physical model tests. By comparing the computed and the observed results, one can find and confirm that it is necessary to employ an appropriate soil model to reproduce dynamic soil behavior due to major vibration. Representation of pile by beam element in the numerical analysis is applicable when attention is paid on the response acceleration of top of pile foundation, on soils at some distances to the pile foundation, and on bending moment of the pile in a stiffer ground. Equal-displacement boundary condition for two-side boundaries is proven to be efficient. To reduce the computation time, the assumption of a constant damping of viscous matrix is acceptable.

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Behavior of Piles with Raft Foundation using Safe Software

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.j9778.0981119 ◽

2019 ◽

Vol 8 (11) ◽

pp. 1432-1436

Keyword(s):

Pile Foundation ◽

Response Spectrum ◽

Time History ◽

Single Pile ◽

Response Spectrum Analysis ◽

Pile Diameter ◽

Raft Foundation ◽

History Analysis ◽

Soil Settlement ◽

Storey Building

Piles with raft foundation are a hybrid type of foundation in which the loads coming from the super structure is partly shared by the raft foundation and partly by the piles. A G+20 Storey building is analysed and designed in ETABS software. The modelling and analysis of piles with raft foundation is done in SAFE Software by importing the building loads. The storey drift and story displacement of the structure has been studied for the superstructure loads using response spectrum analysis and time history analysis in both X and Y axes. Then behavior of piles with Raft foundation is studied in this work by considering different parameters. The Pile diameter, Spacing of piles, Number of piles, and raft thickness are varied and keeping height of the pile as constant, the behavior of pile with raft foundation is determined. Pile with Raft foundation is economical when compared to a single pile foundation or Raft foundation. In the present work of piled with raft foundation, the load is shared between pile and raft. Hence Soil settlement is gradually reduced when the piles are introduced below the raft. Finally the optimum dimensions of pile diameter and thickness of the raft are obtained for minimum settlement.

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ANALISIS FONDASI TIANG RAKIT YANG MENYATU DI SUATU BANGUNAN YANG MEMILIKI TRIBUN DAN TOWER

JMTS: Jurnal Mitra Teknik Sipil ◽

10.24912/jmts.v3i2.7022 ◽

2020 ◽

Vol 3 (2) ◽

pp. 361

Author(s):

Teja Laksmana ◽

Aniek Prihatiningsih

Keyword(s):

Pile Foundation ◽

Shallow Foundation ◽

Deep Foundation ◽

Single Plate ◽

Raft Foundation ◽

Bore Pile ◽

Engineering Changes ◽

High Level ◽

Level Building ◽

Made In

Foundation is a part of an engineering changes system that continuing load supported by the load itself into the land/ground and rocks that located underneath. High level building are usually built using deep foundation likely : bore pile or stake pile, but there are also high level building that are built on raft foundation that is one of shallow foundation. Function of Raft foundation is to spread out the load from land structure underneath that consist of widespread single plate, and support structure load upward (Aratus, 2004). Building are usually have tower and podium side which the load is different. The aims of this study are for comparison the settlement happen on flecible raft pile foundation in accordance with the load that are borne by themselves. If the load that are borne bigger than tower, therefore the settlement which happen are also bigger compared with the settlement on podium area. the reduction in the length of the pile obtained also differ between the tower and the podium so that savings can be made in terms of cost.AbstrakFondasi merupakan bagian dari suatu sistem rekayasa yang meneruskan beban yang ditopang serta beratnya sendiri ke dalam tanah dan batuan yang terletak di bawahnya. Bangunan bertingkat tinggi biasanya dibangun menggunakan fondasi dalam seperti tiang bor atau tiang pancang, tetapi ada juga bangunan bertingkat tinggi yang dibangun di atas fondasi rakit yang merupakan salah satu dari fondasi dangkal. Fondasi rakit berfungsi untuk menyebarkan beban dari struktur tanah di bawahnya yang terdiri dari pelat tunggal yang meluas, yang mendukung beban struktur di atasnya. Bangunan gedung biasanya memiliki bagian tower dan podium yang bebannya berbeda. Tujuan dari studi ini adalah untuk membandingkan penurunan yang terjadi pada fondasi tiang rakit fleksibel sesuai dengan beban yang dipikulnya. Apabila beban yang di pikul lebih besar seperti tower maka penurunan yang terjadi juga lebih besar, dibangdingkan dengan penurunan pada daerah podium. Selain dibandingkan penurunannya panjang tiang yang didapat juga berbeda antara bagian tower dan podium sehingga dapat dilakukan penghematan dari segi biaya.

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On the Influence of Pile Foundation Settlement of Existing High-Rise Buildings on the Surrounding Buildings

Advances in Civil Engineering ◽

10.1155/2021/5560112 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Ke Chen

Keyword(s):

Numerical Simulation ◽

Pile Foundation ◽

Pile Group ◽

Single Pile ◽

Foundation Settlement ◽

Squeezing Effect ◽

Engineering Construction ◽

High Rise ◽

Problems And Solutions ◽

Influence Degree

Pile foundation settlement is a kind of foundation form. In recent years, because of the increasing population and economic development in China, high-rise buildings have emerged in people’s vision. Due to the development of engineering construction, the type and technology of pile foundation, as well as the control and detection of the single pile and pile group have been greatly improved. In view of the influence of pile foundation settlement on the surrounding environment of high-rise buildings, this paper mainly studies from the angle of single pile settlement and pile group settlement. According to the construction method of pile foundation, the static pressure sinking pipe cast-in-place pile can produce soil squeezing effect in pile foundation construction. The experimental analysis was carried out. According to the engineering example, finite element numerical simulation is used to analyze the influence degree of pile foundation settlement on adjacent buildings with and without raft, and the feasibility and correctness of numerical simulation are analyzed by comparing the simulation results with the measured values. This paper mainly studies the influence of pile foundation settlement of high-rise buildings on surrounding buildings from the aspects of problems and solutions.

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Integrated Reservoir Characterization And Development Through An Improved Workflow Approach To Couple A Three Dimensional Seismic Study Results And Reservoir Numerical Simulation: Revealing The Effect Of Structural Features In La Victoria Field

10.2523/14295-ms ◽

2011 ◽

Author(s):

Karilys Castillo ◽

Marisely Urdaneta ◽

Yamal Eduardo Askoul

Keyword(s):

Numerical Simulation ◽

Reservoir Characterization ◽

Three Dimensional ◽

Structural Features ◽

Study Results

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Numerical and Experimental Study of Lightning Stroke to BIPV Modules

Energies ◽

10.3390/en14030748 ◽

2021 ◽

Vol 14 (3) ◽

pp. 748

Author(s):

Xiaoyan Bian ◽

Yao Zhang ◽

Qibin Zhou ◽

Ting Cao ◽

Bengang Wei

Keyword(s):

Numerical Simulation ◽

Experimental Study ◽

Coupling Model ◽

Maximum Temperature ◽

Lightning Stroke ◽

Study Results ◽

Pv Modules ◽

New Type ◽

Metal Frame ◽

Current Flows

Building Integrated Photovoltaic (BIPV) modules are a new type of photovoltaic (PV) modules that are widely used in distributed PV stations on the roof of buildings for power generation. Due to the high installation location, BIPV modules suffer from lightning hazard greatly. In order to evaluate the risk of lightning stroke and consequent damage to BIPV modules, the studies on the lightning attachment characteristics and the lightning energy withstand capability are conducted, respectively, based on numerical and experimental methods in this paper. In the study of lightning attachment characteristics, the numerical simulation results show that it is easier for the charges to concentrate on the upper edge of the BIPV metal frame. Therefore, the electric field strength at the upper edge is enhanced to emit upward leaders and attract the lightning downward leaders. The conclusion is verified through the long-gap discharge experiment in a high voltage lab. From the experimental study of multi-discharge in the lab, it is found that the lightning interception efficiency of the BIPV module is improved by 114% compared with the traditional PV modules. In the study of lightning energy withstand capability, a thermoelectric coupling model is established. With this model, the potential, current and temperature can be calculated in the multi-physical field numerical simulation. The results show that the maximum temperature of the metal frame increases by 16.07 °C when 100 kA lightning current flows through it and does not bring any damage to the PV modules. The numerical results have a good consistency with the experimental study results obtained from the 100 kA impulse current experiment in the lab.

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