Quick tool to model prefabricated slabs and wall panels is optionally available for later analysis in 1585045107514-279.png 3D Structure module and the designing in 1585045099509-698.png.

Definition steps

  1. If needed, set a proper position for the working plane.
  2. Choose 1585045510859-917.png or 1585045522483-766.png according to the panel function to define a new profiled panel: 1585045513515-412.png Use as plate or 1585045525702-258.png Use as wall.
  3. Set the panel settings under 1585045533218-330.png (plate) or 1585045539374-688.png (wall) Default settings.
    • Identifier (General)
      The program automatically generates it, but you can define custom value. Identifier (ID and Position) number can be displayed in model view (Display settings).
    • Alignment and Eccentricity (General)
      With Alignment the position of the reference (definition) plane can be set to Top/Left, Center or Bottom/Right.
      Eccentricity (e) is handled the same was as in Plane Plate.
      Eccentricity value can be displayed in model view (Display settings).
    • Section (Section)
      Predefined panel types are available in Section library in Hollow Core. Cross-section types can be imported or exported between users like the FEM-Design materials.
    • Physical and analytical model (General)
      In Profiled plate/wall dialog there is opportunity to select the physical model (in-situ or prefabricated), then analytical system of shell, if applicable. The analytical system can be Continuous or Panel by panel. This option is available in profiled plate and profiled wall.
    • Camber simulation by prestressing (General)
      See details at Beam.

      1585045613999-803.png
      1585045626913-517.png
      Figure: Physical model and Analytical system of a prefabricated panel
      light.png

      Choosing continuous analytical system can be useful when modelling the whole structure e.g. in the preliminary design phase. The memory usage of calculation with continuous analytical system is less than panel by panel system due to the reduced number of edge connections.

      The use of panel by panel analytical system is reasonable in the phase of detailed design. In this case the results of the calculation are more accurate.

      light.pngIn case of continuous analytical system, effect of the connections between the panels can be considered by the transverse flexural stiffness factor.
  4. Set the panel group’s edge connection in Border tab.

  5. Set the unique panel’s edge connection in Panel tab. The following figure shows the difference between the continuous and the panel border.
    1585045794982-572.png
  6. Define the profiled plate/wall based on the geometry of the reference plane/base line.
    For plate panels, the stiff direction has to be defined first. (For walls, the stiff direction is always perpendicular to the wall base line.) The distribution of panels is described with an anchor point. Defining is similar to Timber panel definition.

Optional steps:

  1. The panel type of selected profiled panels can be modified subsequently with the 1585045839550-796.png  Properties tool.
  2. Modify the default edge connections of the unique panel or panel group with 1585045844837-529.png . Just select the plate/wall panel and then its edge(s) to set connection conditions at Border (DOF of the panel group) or Panel tab (rigid, hinged, free or semi-rigid (spring)), and finally set the requested motion and rotation settings. See the definition steps and possibilities at Plate.
  3. Openings and cuttings can be added to timber panel elements with Edit > Region operations > Split regions.
  4. Set the display settings of timber panels at Settings > All > Display > Shell (see Plate display settings).
  5. The panels are stored on “Plates” Object layers. At layer settings, the default color and pen width can be set for all panel regions. The color and pen width settings by selected panel elements can be modified by Edit > Properties > Change appearance.
  6. Modifying the anchor point it’s possible with Base line command:
    1585045861807-620.png
  7. With Swap panel two panel placement can be change which one panel is a truncated panel.
    1585046075091-648.png

    1585046143011-720.png
  8. Cut panel will change the placement of the truncated panel.
    1585046188164-938.png
    1585046180527-158.png
  9. To simulate camber of the elements check the box next to Camber simulation by prestressing in the Default setting/General tab.
    1585046529115-808.png

Calculation of Profiled shell

Profiled shells are calculated as Fictitious shells (the stiffness matrices are calculated automatically, according to the tables below).

1585046552924-738.png

1585046558840-520.png

Section data:

  • hx, hy : equivalent thickness in x and y direction
  • Ix, Iy: equivalent inertias in x and y direction
  • ρx, ρy: equivalent shear factor in x and y direction
  • x direction: strong axis of the panel cross-section
  • y direction: is perpendicular to the x direction in the plane of the panel

Material data:

  • E: Young modulus
  • G: Shear modulus
  • ν: Poisson’s ratio

Panel data:

  • q: transverse flexural stiffness factor (applicable only in Continuous analytical system)

Modifying any above mentioned data will affect the stiffness of shell. The stiffness of shell is calculated automatically. The value of the stiffness (derived from properties of the shell) can be checked by clicking on the “Display stiffness” button.

1585046605576-941.png

Different types of Young moduli (except for steel material) can be set in different types of calculations. It has a direct effect  on the values of stiffness matrices in different types of calculations. The stiffness values can be easily checked in “Display stiffness” dialog.

1585046613340-569.png

This feature gives the possibility to automatically calculate stiffness of concrete shell having complex geometry. Some typical examples are shown below (sections are made in section-editor).

1585046621981-112.png 1585046627727-400.png

1585046633410-399.png 1585046640399-344.png

Copyright 2020 StruSoft AB
FEM-Design Wiki