标签：temperature positive uniform member IfcThermodynamicTemperatureMeasure IfcStruct

IfcStructuralLoadTemperature

修改记录

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcStructuralLoadTemperature
DeltaTConstant		X	MODIFIED	Name changed from DeltaT_Constant to DeltaTConstant.
DeltaTY		X	MODIFIED	Name changed from DeltaT_Y to DeltaTY.
DeltaTZ		X	MODIFIED	Name changed from DeltaT_Z to DeltaTZ.

 

 

 

 

 

 

 

 

实体IfcStructuralLoadTemperature的实例应用于定义由温度变化引起的响应。如下图所示，温度的变化用一个应用于整个截面的恒定值和截面外部纤维之间的温差值来表示。

IFC2x2中增加的新实体。

 

 

 

 

 

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcStructuralLoad
1	Name	IfcLabel	[0:1]	Optionally defines a name for this load.	X
IfcStructuralLoadOrResult
IfcStructuralLoadStatic
IfcStructuralLoadTemperature
2	DeltaTConstant	IfcThermodynamicTemperatureMeasure	[0:1]	Temperature change which affects the complete section of the structural member, or the uniform portion of a non-uniform temperature change. NOTE  A positive value describes an increase in temperature. I.e. a positive constant temperature change causes elongation of a member, or compression in the member if there are respective restraints.	X
3	DeltaTY	IfcThermodynamicTemperatureMeasure	[0:1]	Non-uniform temperature change, specified as the difference of the temperature change at the outer fibre of the positive y direction minus the temperature change at the outer fibre of the negative y direction of the analysis member. NOTE  A positive non-uniform temperature change in y induces a negative curvature of the member about z, or a positive bending moment about z if there are respective restraints. y and z are local member axes.	X
4	DeltaTZ	IfcThermodynamicTemperatureMeasure	[0:1]	Non-uniform temperature change, specified as the difference of the temperature change at the outer fibre of the positive z direction minus the temperature change at the outer fibre of the negative z direction of the analysis member. NOTE  A positive non-uniform temperature change in z induces a positive curvature of the member about y, or a negative bending moment about y if there are respective restraints. y and z are local member axes.	X

 

 

EXPRESS Specification

ENTITY IfcStructuralLoadTemperature
 SUBTYPE OF (IfcStructuralLoadStatic);
  DeltaTConstant : OPTIONAL IfcThermodynamicTemperatureMeasure;
  DeltaTY : OPTIONAL IfcThermodynamicTemperatureMeasure;
  DeltaTZ : OPTIONAL IfcThermodynamicTemperatureMeasure;
END_ENTITY;

 

 

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标签：temperature,positive,uniform,member,IfcThermodynamicTemperatureMeasure,IfcStruct
来源： https://www.cnblogs.com/herd/p/14982934.html

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