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7.10.3.21 IfcStructuralPointReaction

7.10.3.21.1 Semantic definition

This entity defines a reaction which occurs at a point. A point reaction is typically connected with a point connection. It may also be connected with a curve member or curve connection, or surface member or surface connection.

*Coordinate Systems*:

See definitions at IfcStructuralActivity.

*Topology Use Definitions*:

Standard Case: If connected with a point item, instances of IfcStructuralPointReaction shall not have an ObjectPlacement nor a Representation. It is implied that the placement and representation of the reaction is the same as the structural item.

Special Case 1: If connected with a curve item or surface item, instances of IfcStructuralPointReaction shall have an ObjectPlacement and Representation, containing an IfcVertexPoint. See IfcStructuralActivity for further definitions.

Special Case 2: If not connected with a structural item (which may happen in an incomplete or conceptual model), a point action should have an ObjectPlacement and Representation, containing an IfcVertexPoint. See IfcStructuralActivity for further definitions.

7.10.3.21.2 Entity inheritance

7.10.3.21.3 Attributes

# Attribute Type Description
IfcRoot (4)
IfcObjectDefinition (7)
IfcObject (5)
IfcProduct (5)
Click to show 21 hidden inherited attributes
IfcStructuralActivity (3)
8 AppliedLoad IfcStructuralLoad

Load or result resource object which defines the load type, direction, and load values.

In case of activities which are variably distributed over curves or surfaces, IfcStructuralLoadConfiguration is used which provides a list of load samples and their locations within the load distribution, measured in local coordinates of the curve or surface on which this activity acts. The contents of this load or result distribution may be further restricted by definitions at subtypes of IfcStructuralActivity.

9 GlobalOrLocal IfcGlobalOrLocalEnum

Indicates whether the load directions refer to the global coordinate system (global to the analysis model, i.e. as established by IfcStructuralAnalysisModel.SharedPlacement) or to the local coordinate system (local to the activity or connected item, as established by an explicit or implied representation and its parameter space).

AssignedToStructuralItem SET [0:1] OF IfcRelConnectsStructuralActivity FOR RelatedStructuralActivity

Reference to the IfcRelConnectsStructuralActivity relationship by which activities are connected with structural items.

Table 7.10.3.21.B

7.10.3.21.4 Formal propositions

Name Description
SuitableLoadType

A structural point reaction shall have as a result either a single force or a single displacement.

SIZEOF(['IFC4X3_DEV_738df036.IFCSTRUCTURALLOADSINGLEFORCE', 'IFC4X3_DEV_738df036.IFCSTRUCTURALLOADSINGLEDISPLACEMENT'] * TYPEOF(SELF\IfcStructuralActivity.AppliedLoad)) = 1
Table 7.10.3.21.C

7.10.3.21.5 Property sets

  • Pset_Risk
    • RiskName
    • RiskType
    • NatureOfRisk
    • RiskAssessmentMethodology
    • UnmitigatedRiskLikelihood
    • UnmitigatedRiskConsequence
    • UnmitigatedRiskSignificance
    • MitigationPlanned
    • MitigatedRiskLikelihood
    • MitigatedRiskConsequence
    • MitigatedRiskSignificance
    • MitigationProposed
    • AssociatedProduct
    • AssociatedActivity
    • AssociatedLocation
  • Pset_Tolerance
    • ToleranceDescription
    • ToleranceBasis
    • OverallTolerance
    • HorizontalTolerance
    • OrthogonalTolerance
    • VerticalTolerance
    • PlanarFlatness
    • HorizontalFlatness
    • ElevationalFlatness
    • SideFlatness
    • OverallOrthogonality
    • HorizontalOrthogonality
    • OrthogonalOrthogonality
    • VerticalOrthogonality
    • OverallStraightness
    • HorizontalStraightness
    • OrthogonalStraightness
    • VerticalStraightness
  • Pset_Uncertainty
    • UncertaintyBasis
    • UncertaintyDescription
    • HorizontalUncertainty
    • LinearUncertainty
    • OrthogonalUncertainty
    • VerticalUncertainty
  • Qto_BodyGeometryValidation
    • GrossSurfaceArea
    • NetSurfaceArea
    • GrossVolume
    • NetVolume
    • SurfaceGenusBeforeFeatures
    • SurfaceGenusAfterFeatures

7.10.3.21.6 Concept usage

Concept Usage Description
IfcRoot (2)
IfcObjectDefinition (9)
IfcObject (5)
IfcProduct (18)
Click to show 34 hidden inherited concepts
Table 7.10.3.21.D

7.10.3.21.7 Examples

7.10.3.21.8 Formal representation

ENTITY IfcStructuralPointReaction
SUBTYPE OF (IfcStructuralReaction);
WHERE
SuitableLoadType : SIZEOF(['IFC4X3_DEV_738df036.IFCSTRUCTURALLOADSINGLEFORCE', 'IFC4X3_DEV_738df036.IFCSTRUCTURALLOADSINGLEDISPLACEMENT'] * TYPEOF(SELF\IfcStructuralActivity.AppliedLoad)) = 1;
END_ENTITY;

7.10.3.21.9 References

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7.10.3.21.10 Changelog

7.10.3.21.10.1 IFC4

  • where rule, SuitableLoadType
  • where rule, WR61