Property: Material

Function

Define the material properties of structures and ground.

Call

 Model > Property > Material

For new or additional Material, click in the Properties dialog box and select Structure for structural material or Ground for ground material.

<Material>

• IN case of entering the material properties of structure
   

<Add/Modify Structural Material>

General

ID

Material property number.
Name

Material property name.
Color

Select the color of Material property.
 

Material Parameter

Modulus of Elasticity

Enter the elastic modulus of material.
Poisson's Ratio

Enter the poisson's ratio of material.
Unit Weight

Enter the unit Weight of material

Damping(Only Dynamic)

Damping Ratio

Enter the damping ratio of structural material.

(Damping ratio is only reflected in case of Analysis Type : Time History(Linear)).
 

• Incase of entering the material properties of gound

The dialog boxes, where material properties are defined by the user, used to be activated with default values. GTS  automatically inactivates unnecessary parameters of each material model for analysis. For example, properties in the elastic model, such as cohesion and internal friction angle, which are not used for calculation, are inactivated.   
 

<Add/Modify Ground Material>

General

ID

Material property number.
Name

Material property name.
Color

Select the color of Material property.

 

Material Parameter

Modulus of Elasticity

Enter the Modulus of Elasticity.
Poisson's Ratio

Poisson's ratio is used to calculate the Shear Modulus of Elasticity

Alternative Stiffness Parameters

Instead of using the Young’s modulus as a stiffness parameter, alternative stiffness parameters of G and Eoed can be entered. The alternatives are influenced by the input values of E and ν.  

(These parameters are available in Elastic, Tresca, von Mises, Drucker Prager, Mohr Coulomb, Hoek-Brown, Hyperbolic, Strain Softening, Modified Cam Clay, User supplied material)

Shear Modulus(G)

Enter the Shear Modulus.

where

Oedometer Modulus(Eoed)

Enter the Oedometer Modulus.

where

Unit Weight

Enter the unit weight of ground material.
Unit Weight (Saturated)

Enter the unit weight of ground material after saturation.
Cohesion

Enter the cohesion parameter.
Frictional Angle

Enter the frictional angle of ground material

Damping(Only Dynamic)

Damping Ratio

Enter the damping ratio of ground material.

(Damping ratio is only reflected in case of Analysis Type : Time History(Linear)) .
 

Initial Stress Parameter

If Anisotropy is not checked

Ko : Coefficient of Earth Pressure at Rest
 

If Anisotropy is checked
 

Seepage Parameter

Permeability Coefficient

Enter Permeability Coefficient in each direction.
Vol. Water Content

Enter the volumetric water content.

Unsaturated Property

This option defines permeability function and water content function which are used in the unsaturated seepage analysis. If no function has been defined, click    button to add a new unsaturated property function.
 

Drainage Parameter

Drained

Check on to consider drained condition.
Undrained

Check on to consider undrained condition.  
 

Note:  In order to fully activate an undrained condition, this option must also be activated in "Define Construction stage." Refer to Define Construction Stage.

Skempton's B Coefficient

Input parameter for Skempton's B Coefficient.
 

Constitutive Model

Select ground material model. MIDAS/GTS provides the following 13 material models. Please refer to Analysis Manual for detail information.
 

• Elastic

• Transversely Isotropic

• Tresca

• von Mises

• Drucker Prager

• Mohr Coulomb

• Hoek-Brown

• Hyperbolic(Duncan-Chang)

• Strain Softening

• Modified Cam Clay

• Jointed Rock Mass

• Jardine Model

• Modified Mohr-Coulomb
  
  
   

To modify previously entered Material data, select the Material to be modified in the list of the Material dialog box and click to modify the related data.

To remove previously entered Material data, select the Material to be deleted in the list of the Material dialog box and click.

To copy previously entered Material data, select the Material to be copied in the list of the Material dialog box and click .

To import previously entered Material data from another GTB file, click and select the GTB file containing Material data or specify a file name and then click Open button.

<Import Material>

Material List

Display Material data contained in the existing *.GTB file.
 

Selected List

Select Material data to be imported and register the data in the Selected List.
 

Numbering Type of Material

Specify the Import mode for material property numbers.

Keep ID

Import the data keeping the same material property numbers.
New ID

Assign new numbers to the imported material property data.

 To modify previously entered material property numbers, Select Material numbers to be renumbered from the list in the Material dialog box and modify the related data followed by clicking .
 

<Renumbering Material>

Start number

Assign a new starting number for Material to be modified.
 

Increment number

Enter the increment for numbering Material numbers.
 

Change element's material number

Modify a material property number. Using this option will modify the previously defined material property number. If this option is not checked, the selected material having previously defined number will become undefined and the additional user-defined material number will be created without any assigned elements.