IfcBoundaryFaceCondition

Natural language names
Randbedingung an einer Fläche
Boundary Face Condition
Condition de face limite
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4 4.0.0.0
    IfcBoundaryFaceCondition
      TranslationalStiffnessByAreaXMODIFIEDName changed from LinearStiffnessByAreaX to TranslationalStiffnessByAreaX.
Type changed from IfcModulusOfSubgradeReactionMeasure to IfcModulusOfSubgradeReactionSelect.
      TranslationalStiffnessByAreaYMODIFIEDName changed from LinearStiffnessByAreaY to TranslationalStiffnessByAreaY.
Type changed from IfcModulusOfSubgradeReactionMeasure to IfcModulusOfSubgradeReactionSelect.
      TranslationalStiffnessByAreaZMODIFIEDName changed from LinearStiffnessByAreaZ to TranslationalStiffnessByAreaZ.
Type changed from IfcModulusOfSubgradeReactionMeasure to IfcModulusOfSubgradeReactionSelect.
IFC2x3 to IFC4 4.0.0.0
    IfcBoundaryFaceCondition
      TranslationalStiffnessByAreaXMODIFIEDName changed from LinearStiffnessByAreaX to TranslationalStiffnessByAreaX.
Type changed from IfcModulusOfSubgradeReactionMeasure to IfcModulusOfSubgradeReactionSelect.
      TranslationalStiffnessByAreaYMODIFIEDName changed from LinearStiffnessByAreaY to TranslationalStiffnessByAreaY.
Type changed from IfcModulusOfSubgradeReactionMeasure to IfcModulusOfSubgradeReactionSelect.
      TranslationalStiffnessByAreaZMODIFIEDName changed from LinearStiffnessByAreaZ to TranslationalStiffnessByAreaZ.
Type changed from IfcModulusOfSubgradeReactionMeasure to IfcModulusOfSubgradeReactionSelect.
Semantic definitions at the entity
Entity definition

Describes linearly elastic support conditions or connection conditions.

Applicability:

HISTORY  New entity in IFC2x2.
IFC 2x4 change: Attributes LinearStiffnessX/Y/Z renamed to TranslationalStiffnessX/Y/Z.

IFC4 change All attribute data types changed from numeric to SELECT between Boolean and numeric. Stiffnesses may now also be negative, for example to capture destabilizing effects in boundary conditions. The IFC2x3 convention of -1. representing infinite stiffness is no longer valid and must not be used. Infinite stiffness, i.e. fixed supports, are now modeled by the Boolean value TRUE.

Attribute definitions
#AttributeTypeCardinalityDescription G
2TranslationalStiffnessByAreaXIfcModulusOfSubgradeReactionSelect? Translational stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object. X
3TranslationalStiffnessByAreaYIfcModulusOfSubgradeReactionSelect? Translational stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object. X
4TranslationalStiffnessByAreaZIfcModulusOfSubgradeReactionSelect? Translational stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object. X
Inherited definitions from supertypes
Entity inheritance IfcBoundaryCondition
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcBoundaryCondition
1NameIfcLabel? Optionally defines a name for this boundary condition. X
IfcBoundaryFaceCondition
2TranslationalStiffnessByAreaXIfcModulusOfSubgradeReactionSelect? Translational stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object. X
3TranslationalStiffnessByAreaYIfcModulusOfSubgradeReactionSelect? Translational stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object. X
4TranslationalStiffnessByAreaZIfcModulusOfSubgradeReactionSelect? Translational stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object. X
Formal representations
XML Specification
 <xs:element name="IfcBoundaryFaceCondition" type="ifc:IfcBoundaryFaceCondition" substitutionGroup="ifc:IfcBoundaryCondition" nillable="true"/>
 <xs:complexType name="IfcBoundaryFaceCondition">
  <xs:complexContent>
   <xs:extension base="ifc:IfcBoundaryCondition">
    <xs:sequence>
     <xs:element name="TranslationalStiffnessByAreaX" nillable="true" minOccurs="0">
      <xs:complexType>
       <xs:group ref="ifc:IfcModulusOfSubgradeReactionSelect"/>
      </xs:complexType>
     </xs:element>
     <xs:element name="TranslationalStiffnessByAreaY" nillable="true" minOccurs="0">
      <xs:complexType>
       <xs:group ref="ifc:IfcModulusOfSubgradeReactionSelect"/>
      </xs:complexType>
     </xs:element>
     <xs:element name="TranslationalStiffnessByAreaZ" nillable="true" minOccurs="0">
      <xs:complexType>
       <xs:group ref="ifc:IfcModulusOfSubgradeReactionSelect"/>
      </xs:complexType>
     </xs:element>
    </xs:sequence>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcBoundaryFaceCondition
 SUBTYPE OF (IfcBoundaryCondition);
  TranslationalStiffnessByAreaX : OPTIONAL IfcModulusOfSubgradeReactionSelect;
  TranslationalStiffnessByAreaY : OPTIONAL IfcModulusOfSubgradeReactionSelect;
  TranslationalStiffnessByAreaZ : OPTIONAL IfcModulusOfSubgradeReactionSelect;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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