IfcSurfaceReinforcementArea

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcSurfaceReinforcementArea			ADDED

Semantic definitions at the entity

Entity definition

Describes required or provided reinforcement area of surface members.

NOTE Member design parameters like concrete cover, effective depth, orientation of meshes or rebars (two, optionally three directions) etc. are not specified in IfcStructuralLoadResource schema. They shall be specified at the level of structural members.

HISTORY New entity in IFC4.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
2	SurfaceReinforcement1	IfcLengthMeasure	L[2:3]	Reinforcement at the face of the member which is located at the side of the positive local z direction of the surface member. Specified as area per length, e.g. square metre per metre (hence length measure, e.g. metre). The reinforcement area may be specified for two or three directions of reinforcement bars.	X
3	SurfaceReinforcement2	IfcLengthMeasure	L[2:3]	Reinforcement at the face of the member which is located at the side of the negative local z direction of the surface member. Specified as area per length, e.g. square metre per metre (hence length measure, e.g. metre). The reinforcement area may be specified for two or three directions of reinforcement bars.	X
4	ShearReinforcement	IfcRatioMeasure	[0:1]	Shear reinforcement. Specified as area per area, e.g. square metre per square metre (hence ratio measure, i.e. unitless).	X

Formal Propositions

Rule	Description
SurfaceAndOrShearAreaSpecified	At least one of the reinforcement area attributes shall be specified.
NonnegativeArea1	Surface reinforcement area must not be less than 0.
NonnegativeArea2	Surface reinforcement area must not be less than 0.
NonnegativeArea3	Shear reinforcement area must not be less than 0.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcStructuralLoad
1	Name	IfcLabel	[0:1]	Optionally defines a name for this load.	X
IfcStructuralLoadOrResult
IfcSurfaceReinforcementArea
2	SurfaceReinforcement1	IfcLengthMeasure	L[2:3]	Reinforcement at the face of the member which is located at the side of the positive local z direction of the surface member. Specified as area per length, e.g. square metre per metre (hence length measure, e.g. metre). The reinforcement area may be specified for two or three directions of reinforcement bars.	X
3	SurfaceReinforcement2	IfcLengthMeasure	L[2:3]	Reinforcement at the face of the member which is located at the side of the negative local z direction of the surface member. Specified as area per length, e.g. square metre per metre (hence length measure, e.g. metre). The reinforcement area may be specified for two or three directions of reinforcement bars.	X
4	ShearReinforcement	IfcRatioMeasure	[0:1]	Shear reinforcement. Specified as area per area, e.g. square metre per square metre (hence ratio measure, i.e. unitless).	X

Formal representations

XSD Specification

 <xs:element name="IfcSurfaceReinforcementArea" type="ifc:IfcSurfaceReinforcementArea" substitutionGroup="ifc:IfcStructuralLoadOrResult" nillable="true"/>

 <xs:complexType name="IfcSurfaceReinforcementArea">

  <xs:complexContent>

   <xs:extension base="ifc:IfcStructuralLoadOrResult">

    <xs:attribute name="SurfaceReinforcement1" use="optional">

     <xs:simpleType>

      <xs:restriction>

       <xs:simpleType>

        <xs:list itemType="ifc:IfcLengthMeasure"/>

       </xs:simpleType>

       <xs:minLength value="2"/>

       <xs:maxLength value="3"/>

      </xs:restriction>

     </xs:simpleType>

    </xs:attribute>

    <xs:attribute name="SurfaceReinforcement2" use="optional">

     <xs:simpleType>

      <xs:restriction>

       <xs:simpleType>

        <xs:list itemType="ifc:IfcLengthMeasure"/>

       </xs:simpleType>

       <xs:minLength value="2"/>

       <xs:maxLength value="3"/>

      </xs:restriction>

     </xs:simpleType>

    </xs:attribute>

    <xs:attribute name="ShearReinforcement" type="ifc:IfcRatioMeasure" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcSurfaceReinforcementArea

 SUBTYPE OF (IfcStructuralLoadOrResult);

  SurfaceReinforcement1 : OPTIONAL LIST [2:3] OF IfcLengthMeasure;

  SurfaceReinforcement2 : OPTIONAL LIST [2:3] OF IfcLengthMeasure;

  ShearReinforcement : OPTIONAL IfcRatioMeasure;

 WHERE

  SurfaceAndOrShearAreaSpecified : EXISTS(SurfaceReinforcement1) OR EXISTS(SurfaceReinforcement2) OR EXISTS(ShearReinforcement);
  NonnegativeArea1 : (NOT EXISTS(SurfaceReinforcement1)) OR (
    (SurfaceReinforcement1[1] >= 0.) AND
    (SurfaceReinforcement1[2] >= 0.) AND
    ((SIZEOF(SurfaceReinforcement1) = 1) OR (SurfaceReinforcement1[1] >= 0.))
);
  NonnegativeArea2 : (NOT EXISTS(SurfaceReinforcement2)) OR (
    (SurfaceReinforcement2[1] >= 0.) AND
    (SurfaceReinforcement2[2] >= 0.) AND
    ((SIZEOF(SurfaceReinforcement2) = 1) OR (SurfaceReinforcement2[1] >= 0.))
);
  NonnegativeArea3 : (NOT EXISTS(ShearReinforcement)) OR (ShearReinforcement >= 0.);
END_ENTITY;

 EXPRESS-G diagram

	Oberfläche - Bewehrungsfläche
	Surface Reinforcement Area