Soil rectangular loads
Normally in a raft analysis the load on the soil is from the structure, but additional soil loads can be specified. These act in addition to the raft loading.
Definition
Name
This is just used to make it easier to identify a soil load
**Loading plane orientation **
The orientation of the loading plane. A load in the vertical plane and no rotation angle is in the XZ plane.
Angle of local x from global X
Define the rotation angle of the load about the global z axis.
Centre of loaded area
The coordinates of the centre of the rectangular loading area (x, y, & z in global axis).
Width x
The width of the area in local x.
Length y
The length of the area in local y.
Load values in normal and tangent directions
- Normal load in local z direction.
- Tangent load in local x direction
- Tangent load in local y direction
Note that the soil loads follow the PDisp convention:
| Loading plane orientation | Angle of local x from global x | Global direction of local z load (normal) | Global direction of local x load (tangential) | Global direction of local y load (tangential) |
|---|---|---|---|---|
| Horizontal plane | 0 | -Z | X | Y |
| Vertical plane | 0 | -Y | X | -Z |
| Vertical plane | 90 | X | Y | -Z |