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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