Pile Group Analysis in Abaqus

Prof. PhD.-Ing. William Fuentes Lacouture

Ing. Luis Castillo Suárez

Universidad del Norte

Department of Civil and Environmental Engineering

Barranquilla, Colombia

2018

This tutorial simulates four piles in a pile group analysis using the mohr-Coulomb constitutive model in thesoftware ABAQUS/CAE.The pile group has a square arrangement, taking advantage of the symmetric condition only one-fourth isconsidered.

The soil sample dimensions are 40 m x40 m x 30 m. Each rectangular pile hascross section dimensions 0.6m x 0.6mand an the emdebbed length of the pile15m. Recommended soil width anddepth are 30 times the pile diameter andtwice the length.

The soil layer is a sand with a c’= 3KPaand a friction angle φ’ =30°. The Poissonratio is ν =0.3.Calculate the total loadcapacity of the pile group.

MODULE: PART

Select the Module Part from the Module list. click on create part.

Select 3D, deformable, solid and extrusion. Click on create lines: Rectangle (4 line) to define the rectangledimension. The coordinates are: 0,0 and 20,20, pick the “red X” and Select done.

Depth: 30 m and OK button.

Create another Part whit the same Create Part properties, the pile dimensions are 0.6 , 0.6 and 1.2 , 1.2, depth15 m. OK button to create the pile.

DEFINE PROPERTIES.MODULE: PROPERTY

Select create in Materials option.

To define the Material Behavior. Click on General, select Density, Mass Density 2 Ton/m3.In Mechanical option Elastic. Young’s modulus 10000 KPa and the Poisson’s Ratio 0.3.In Mechanical Plasticity select Morh Coulomb Plasticity.In plasticity tab Friction angle 30° Dilation Angle 0.1°.In Cohesion Tab Cohesion Yield Stress 3 KPa, Abs Plastic Strain 0.

Create another material. Density 2 Ton/m3. In Mechanical option Elastic. Young’s modulus 20000000 KPa,Poisson’s Ratio 0.2

In Section options and select Create.Category Solid, Type Homogeneous.Select the Material (Soil or Pile) in the material list.

In Section Assignment. Select the region to be assigned a section. Create a new Region. Press Done to confirm.

Select the section (Pile or Soil) to assign.Now the model turns green.

MODULE:PART

In Pile case select module Part, select le part Pile, in Tools options select Partition… Select the Cell type and Define cuttingplane. Click on 3 Points options for selecting 3 point to generate a plane to cut.

In the View Manipulation toolbar select the rotate View button to rotate the graphic and get the axis like in thered box. In the options toolbar select the View option and click on Save View.select the View Name to use, select auto-fit. To return to the saved view click on the number saved in the viewstoolbar.

Select two points in the top face and select the third point rotating or displacing the figure.

Select the third point and click on Create partition