M. To assign a foundation support
To automatically model a support using foundation parameters, use the following procedure.
STAAD.Pro can take foundation parameters for footings or mat foundations and automatically model spring supports.
- Select the nodes that will have the same support condition.
-
On the
Specification ribbon tab, select the
Foundation tool in the
Supports group.
The Create Support dialog opens to the Foundation tab. -
Select the
Foundation type to model:
Footing - a rectangular, isolated footing (i.e., spread footing) area is used to model spring stiffness using the subgrade modulus
または
Elastic Mat - the program calculates the influence area of the load and then calculates a spring stiffness based on this area using the subgrade modulus
または
Plate Mat - the program calculates the influence area of the load within a specified plate and then calculates a spring stiffness based on this area using the subgrade modulus
-
Select the
Direction of the resistance of the spring
supports.
The directions X, Y, or Z generate a spring in that global direction. The other two global directions are fixed against translation and moment about the selected direction is also fixed. The directions X Only, Y Only, or Z Only generate a spring in that global direction only.
- Type the Subgrade Modulus of the soil.
- (オプション) For Elastic Mat or Plate Mat foundation types, check the option Print influence area of each joint to include this information in the output.
- (オプション)
For
Elastic Mat or
Plate Mat foundation types, select a nonlinear
spring option if necessary:
Option Description None linear springs are generated Compression Only generated springs are compression only (made inactive if in tension) Multi-Linear generated springs can have a multilinear displacement-spring constant curve associated with the mat foundation -
Either:
To… Do the following… add the support type to the model and assign to the current node selection click Assign. add the support to the model for later assignment click Add.