TR.14.1 Parametric Mesh Models
This is the recommended method for generating meshes in STAAD.Pro as it allows you to modify the mesh parameters after creation.
When a STAAD.Pro model has portions generated from a parametric mesh model, the parametric input (which is not otherwise part of the STAAD input data) is saved within a specially designated section of the STAAD input file. This gives you the flexibility to save mesh models at any time and make modifications at a later time, such as adding an opening or a density line.
It is important that this data not be modified or removed so as to preserve the parametric model. Any changes to the portions of the model marked between the <! and !> marks may have unintended consequences to the model.
General Format
<! STAAD PRO GENERATED DATA DO NOT MODIFY !!!
parametric model data
!> END GENERATED DATA BLOCK
Where parametric model data is in following format:
PARAMETRIC MODEL name TYPE s1 MESH PARAMTERS f1 f2 f3 MESH ORIGIN f4 f5 f6 BOUNDARY f7 f7 times coordinates of boundary nodes (GENERATED NODES node-list) (GENERATED PLATES plate-list)
Then the following optional inputs can be included one or more times:
(OPENING CIRCULAR f8 f9 f10 f11 f12 f13) (OPENING POLYGONAL f14 f14 times coordinates that define the polygonal opening) (REGION CIRCULAR f15 f16 f17 f18 f19 f20) (REGION POLYGONAL f21 f21 times coordinates that define the polygonal region) (DENSITY POINT f22 f22 times coordinates of the density points) (DENSITY LINE f23 f24 f25 f26 f27 f28 f29 f30 f31)
END
where:
| Parameter | Description |
|---|---|
| s1 | a category of surface used for post processing. Identifiers include UNIDENTIFIED, SLAB, or WALL. This is used to identify the object but does not otherwise affect the analysis or mesh produced. |
| f1 | Target element size. The default value is the minimum distance between boundary nodes div by 4. |
| f2 | Boundary connectivity:
|
| f3 | Mesh element type
|
| f4, f5, f6 | The indexes (base 0) of three nodes in the parametric surface boundary. In general, f4=0; f5=1, and f6 will be the node that generates the biggest triangle with f4 and f5. These nodes are used to create the local axis of the parametric surface. |
| f7 | Number of boundary nodes. |
| f8, f9, f10 | Coordinates X, Y, Z of the center of circular opening. |
| f11 | Radius of the circular opening. |
| f12 | Number of divisions of circular opening. |
| f13 | Density of the circular opening. |
| f14 | Number of boundary nodes of the polygonal opening. |
| f15, f16, f17 | Coordinates X, Y, Z of the center of circular region. |
| f18 | Radius of the circular region. |
| f19 | Number of divisions of circular region. |
| f20 | Density of the circular region. |
| f21 | Number of boundary nodes of the polygonal region. |
| f22 | Number of density points. |
| f23, f24, f25 | Coordinates X, Y, Z of the starting point of the density line. |
| f26 | Density of the starting point of the density line. |
| f27, f28, f29 | Coordinates X, Y, Z of the ending point of the density line. |
| f30 | Density of the ending point of the density line. |
| f31 | Number of divisions of the density line. |
Example
2072 1114 1113 1160; 2073 1045 1160 1113;
ELEMENT PROPERTY
810 TO 1779 1821 TO 2073 THICKNESS 1
This entire section of the input file must not be edited.
<! STAAD PRO GENERATED DATA DO NOT MODIFY!!!
PARAMETRIC MODEL second_floor
MESH PARAM 0 3
MESH ORG 3 5 8
BOUNDARY 10
11 1 93 1 94 1 95 1 83 1 71 1 70 1 69 1 41 1 26 1
OPENING CIRC 72 360 96 43.2666 12
OPENING POLY 5
216 360 67.2 1 270 360 33.6 2 324 360 67.2 2 270 360 100.8 2 216 360 100.8 2
DENSITY POINTS 2
180 360 168 1 360 360 168 1
DENSITY LINE 0 360 168 100 180 360 168 200
DENSITY LINE 180 360 168 1 360 360 168 1
DENSITY LINE 360 360 168 1 540 360 168 1
DENSITY LINE 180 360 0 1 180 360 168 1
DENSITY LINE 180 360 168 1 180 360 336 1
DENSITY LINE 360 360 0 1 360 360 168 1
DENSITY LINE 360 360 168 1 360 360 336 1
DENSITY LINE 54 360 302.4 1 162 360 201.6 1
DENSITY LINE 216 360 201.6 1 324 360 235.2 1
GENERATED PLATES ALL
END
!> END GENERATED DATA BLOCK
<! STAAD PRO GENERATED DATA DO NOT MODIFY!!!
PARAMETRIC MODEL roof
MESH PARAM 60 3
MESH ORG 2 3 5
BOUNDARY 6
36 1 65 1 66 1 53 1 52 1 51 1
GENERATED PLATES ALL
END
!> END GENERATED DATA BLOCK
DEFINE MATERIAL START
ISOTROPIC STEEL