General
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Name
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Automatically created name based on the grid point location.
Note: This property is only displayed when editing an existing support
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User Name
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You can enter a user name to replace the automatically created name if required.
Note: This property is only displayed when editing an existing support
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Plane
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Describes the level at which the support was placed.
Note: This property is only displayed when editing an existing support
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3 Grid Points
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The options are:
- Checked
A user defined coordinate system is applied to the support. (After clicking where you want to create the support, the second click defines the x direction and the third click defines the y direction.)
- Unchecked (Default)
Support properties are defined in accordance with the global coordinate system.
Note: This property is only displayed when creating a new support
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Fx, Fy, Fz
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The translational degrees of freedom can be set as either Free, or Fixed in each direction.
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Mx, My, Mz
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The rotational degrees of freedom can be set as either Free, or Fixed in each direction.
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Angles
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Inclination, Azimuth and Rotation
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When creating new supports, the angles are calculated automatically depending on the placement method (3 Grid Points Checked/Unchecked).
When editing existing supports, the angles can be edited in order to redefine the direction in which the support acts.
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Translational stiffness x, y, and z
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Type
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In order to define a translational spring in a particular direction, the translational degree of freedom in the same direction must first be set to Free. The available types are:
- Release - (i.e. zero translational stiffness)
- Spring Linear
- Spring Non-linear
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Stiffness
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The options are:
- Spring Linear
A single stiffness value is entered, which acts in both the positive and negative directions.
- Spring Non-linear
Two stiffness values are entered, one to act in the positive direction and a second to act in the negative direction.
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Fmax -ve and Fmax +ve
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For non-linear springs you are also able to define the spring capacity in each direction. (Note that this must always be entered as a positive value, for both +ve and -ve directions).
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Rotational stiffness x, y, z
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Type
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In order to define a rotational spring in a particular direction, the rotational degree of freedom in the same direction must first be set to Free. The available options are:
- Release - (i.e. zero rotational stiffness)
- Spring Linear
- Spring Non-linear
- Nominally Pinned
- Nominally Free
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Stiffness
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The options are:
- Spring Linear
A single stiffness value is entered, which acts in both the positive and negative directions.
- Spring Non-linear
Two stiffness values are entered, one to act in the positive direction and a second to act in the negative direction.
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Stiffness Percentage
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The options are:
- Nominally Pinned - 10%
(i.e. 10% * 4 EI/L)
- Nominally Fixed - 100%
(i.e. 100% * 4 EI/L)
Note: In the above equations, L is the length from the base of the column to the level of the next column stack that is denoted as a floor, or it is the distance to the top of the column if shorter.
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Fmax -ve and Fmax +ve
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For non-linear springs you are also able to define the spring capacity in each direction. (Note that this must always be entered as a positive value, for both +ve and -ve directions).
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