SPC (Sectional Property Calculator)

Summary


  • This function is the same as MIDAS CIVIL Sectional Property Calculator, and it calculates a customized section from the CAD ID with the sectional property information required for analysis.
    It supports exporting to a .sec file, which can be imported into MIDAS CIVIL through the CIVIL Sectional Property Calculator process.

 

How to Run


[CAD View Mode]

  • Ribbon Menu > [Tool] Tab> SPC [SPC]

 

Explanation


How to use SPC function.

Run the SPC [SPC]] command or execute the SPC function of the Tool menu tab.

SPC, Shortcut key : SPC

Commentary contents

SPC, Shortcut key : SPC

Commentary contents

 

image-20240710-071409.png

 

  • [Command]
    Execute SPC from the tree menu or enter the shortcut key SECTIONPROPERTY (SPC) in the command window.

 

image-20240710-072415.png

 

Created SPC Section

  • SPC Section List : Indicates the cross section list for calculating cross section properties.

  • Preview : Shows a preview of the calculated cross section.

  • Add :
    Opens a window for calculating section properties.
    (Before opening the window, the ‘Break object for calculating section properties’ operation is performed.)

  • Modify : Modifies the results of section property calculations.

  • Delete : Delete the cross section whose properties were calculated from the list.

 

 

  • [Command]

  1. Use Sectional Property Calc. (SPC) fuction

  2. Click the ‘Add’ and ‘Modify’ buttons
    Intersecting objects must be cut off to calculate section properties. [Select all objects to breake / Do not break(N)] :

    Calculate Section Properties
    To calculate section properties, all intersections of objects must be disconnected.
    Therefore, when entering the 'Calculate section properties' panel, an action to disconnect the object will be required.
    (Like CAD “Explode” effect)

  3. When selecting an object, the object is disconnected and the ‘Calculate sectional properties’ window will automatically open.
    If the object is already broken, select ‘Do not break(N)’ and the ‘Calculate section properties’ window will automatically open.

 

 

  • [Command]
    Create a Calculate Section Properties panel

 

 

Specify the section name and type.

  • Section Name : Enter the name of the section

  • Section Type :
    There are three section types (Plane, Line, and Composite), and how to define the cross-section according to type is explained below.

 

 

SPC section definition of Plane section type

SPC section definition of Plane section type

  • Select External Object :
    Select the external closure object.
    Only the outermost closed section of the selected total object is recognized.

  • Select Internal Object :
    Select the internal closed object.
    If there are multiple internal objects, select one closed section in turn.

  • Mesh Density :
    Select Mesh Density.

 

 

SPC section definition of Line section type

SPC section definition of Line section type

  • Define Thickness :
    Select the line object and enter the thickness.
    The entered thickness is temporarily applied to the line object and disappears when the ‘Calculate section properties’ window is closed. The preview retains the thickness applied.

  • Define Close Section :
    Select the closed object. If there are multiple objects, select one closed section in turn.

  • Specify Curve Precision :
    Curve precision refers to the degree of division when Spline and Ellipse must be divided into Line for calculation.

  • Create with Steel Design Type :
    When Checked On, the ‘Design Group Setting’ tab is activated and you can define Top, Bottom, Right Web, and Left Web information.

    • When selecting a Top, Bottom, Right Web, or Left Web object, you can select a stiffener, and objects with a stiffener selected are created with a stiffener label.

 

 

SPC section definition of Composite section type

  • Setting Material :
    When you click, the ‘Setting Material’ window is activated, and you can define the name of the material, modulus of elastic, Poisson’s ratio, etc.

    The Base option specifies the Base Material that will be the basis for substitution.
    (For composite sections, the materials must be replaced by one to calculate the section properties of the entire cross section.)

  • Base Material :
    The Base Material specified in the Setting Material window appears.

  • Number of Parts :
    Select the number of parts.

 

 

Calculate CIVIL Section Properties

  • Calculate CIVIL Section Properties : Calculate section properties

  • Force Unit : This is an option that specifies the force unit of the table, such as KN, kgf, tonf

  • Length Unit : This is an option that specifies the length unit of the table, such as mm, inch, or ft.

  • Precision : This is an option to specify the number of decimal places to express.

  • Layer : Option to specify the Layer for the table.

  • Font : Option to specify the font for the table.

 

 

Option

  • Result Location :
    This is an option to select where the section results are output.

  • Object Hatch :
    This is an option to select whether or not the object will be hatched.

  • Create Section Result :
    This is an option to select the section result output method.

  • Mesh Density Preview Window :
    When you click the 'Calculate CIVIL Section Properties' button, you can see the mesh preview window after calculation.

 

 

Preview

  • Preview : Show a section preview.

  • Sectional Property

    • Asy : Effective Shear Area resisting shear force in the element's local y-direction

    • Asz : Effective Shear Area resisting shear force in the element's local z-direction

    • Ixx : Torsional Resistance about the element's local x-axis

    • Iyy : Moment of Inertia about the element's local y-axis

    • Izz : Moment of Inertia about the element's local z-axis

    • Cyp : Distance from the section's neutral axis to the extreme fiber of the element in the local (+)y-direction

    • Cym : Distance from the section's neutral axis to the extreme fiber of the element in the local (-)y-direction

    • Czp : Distance from the section's neutral axis to the extreme fiber of the element in the local (+)z-direction

    • Czm : Distance from the section's neutral axis to the extreme fiber of the element in the local (-)z-direction

    • Peri : O : Total exterior perimeter length of a section

    • Peri : I : Inside perimeter length of a hollow section

    • y1, z1 : Distance from the section's neutral axis to the Location 1 (used for computing combined stress)

    • y2, z2 : Distance from the section's neutral axis to the Location 2 (used for computing combined stress)

    • y3, z3 : Distance from the section's neutral axis to the Location 3 (used for computing combined stress)

    • y4, z4 : Distance from the section's neutral axis to the Location 4 (used for computing combined stress)

 

 

Result

  • Sec Export :
    Export the .Sec file so it can be imported into Civil.

  • Create Section Properties :
    The contents of the preview are output as data in a format that can be checked in the CAD ID.

 

 

Import files from Civil
Load cross-section information.