8.19 IfcStructuralLoadResource(结构载荷)

8.19.1 Schema Definition

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  • IfcStructuralLoadResource保存着结构负载、结果、边界条件和连接条件的定义。这些定义规定了力、力矩、刚度、位移和其他因素。
  • 负载资源定义用于IFC模型的其他部分,特别是将负载定义置于2D或3D空间的结构作用和反应的定义。
  • 说明当前版本的IFC没有定义动态负载,仅限于静态负载。

 8.19.2 Types

 8.19.2.1  IfcModulusOfRotationalSubgradeReactionSelect(旋转地基反力测量的模量)

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  • 旋转路基反力模量的量度,表示结构曲线项目每长度的旋转垫层。
  • TRUE表示无限刚度(刚性)。
  • FALSE表示没有刚度(释放)。
  • 数值表示有限的线弹性刚度。

Enumeration definition

Constant Description
IfcBoolean
IfcModulusOfRotationalSubgradeReactionMeasure

 8.19.2.2  IfcModulusOfSubgradeReactionSelect(路基回弹模量)

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层理度量,表示每个区域的结构面项目层理。

TRUE表示无限刚度(刚性)。

FALSE表示没有刚度(释放)。数值表示有限的线弹性刚度。

Enumeration definition

Constant Description
IfcBoolean
IfcModulusOfSubgradeReactionMeasure

 8.19.2.3  IfcModulusOfSubgradeReactionSelect(地基反力转化的选择)

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  • 平动路基反力模量的量度,表示每长度结构曲线项目的平动垫层。
  • TRUE表示无限刚度(刚性)。
  • FALSE表示没有刚度(释放)。
  • 数值表示有限的线弹性刚度。

Enumeration definition

Constant Description
IfcBoolean
IfcModulusOfLinearSubgradeReactionMeasure

 8.19.2.4  IfcRotationalStiffnessSelect(旋转刚度选择)

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  • 旋转刚度的量度。
  • TRUE表示无限刚度(刚性)。
  • FALSE表示没有刚度(释放)。
  • 数值表示有限的线弹性刚度。

Enumeration definition

Constant Description
IfcBoolean
IfcRotationalStiffnessMeasure

  
8.19.2.5  IfcTranslationalStiffnessSelect(平移刚度选择)

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  • 线性刚度的量度。
  • TRUE表示无限刚度(刚性)。
  • FALSE表示没有刚度(释放)。
  • 数值表示有限的线弹性刚度。

Enumeration definition

Constant Description
IfcBoolean
IfcLinearStiffnessMeasure

8.19.2.6  IfcWarpingStiffnessSelect(扭曲刚度选择)

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  • 扭曲刚度的量度。
  • TRUE表示无限刚度(刚性)。
  • FALSE表示没有刚度(释放)。
  • 数值表示有限的线弹性刚度。

Enumeration definition

Constant Description
IfcBoolean
IfcWarpingMomentMeasure

8.19.3 Entities

8.19.3.1  IfcBoundaryCondition(边界条件)

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  • 抽象实体IfcBoundaryCondition是可应用于结构连接定义的所有边界条件的超类型,可以直接用于连接(例如接头)或用于结构构件与连接之间的关系。
  • 注:边界条件在其他零件中使用,主要由IFCSStructuralConnection实例(用于定义支架)和IFCRelConnectionsStructuralMember实例(用于定义结构构件和结构连接之间的连接)使用。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcBoundaryCondition
1 Name IfcLabel [0:1]

Optionally defines a name for this boundary condition.

(可选)定义此边界条件的名称。

X

8.19.3.2  IfcBoundaryCondition(边界边缘条件)

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  • 描述线性弹性支承条件或连接条件。
  • 适用性:
  •              曲线支撑和连接。
  • IFC4将所有属性数据类型从数值更改为布尔和数值之间的选择。刚度现在也可能是负的,例如用于捕捉边界条件中的失稳效应。IFC2x3公约-1。表示无限刚度不再有效,不得使用。无限刚度,即固定支架,现在由布尔值TRUE建模。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcBoundaryCondition
1 Name IfcLabel [0:1]

Optionally defines a name for this boundary condition.

  • (可选)定义此边界条件的名称。
X
IfcBoundaryEdgeCondition
2 TranslationalStiffnessByLengthX IfcModulusOfTranslationalSubgradeReactionSelect [0:1]

Translational stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object.

  • 使用此资源对象的实例定义的坐标系x方向上的平移刚度值。
X
3 TranslationalStiffnessByLengthY IfcModulusOfTranslationalSubgradeReactionSelect [0:1]

Translational stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object.

  • 由使用此资源对象的实例定义的坐标系y方向上的平移刚度值。
X
4 TranslationalStiffnessByLengthZ IfcModulusOfTranslationalSubgradeReactionSelect [0:1]

Translational stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object.

  • 使用此资源对象的实例定义的坐标系z方向上的平移刚度值。
X
5 RotationalStiffnessByLengthX IfcModulusOfRotationalSubgradeReactionSelect [0:1]

Rotational stiffness value about the x-axis of the coordinate system defined by the instance which uses this resource object.

  • 关于使用此资源对象的实例定义的坐标系x轴的旋转刚度值。
X
6 RotationalStiffnessByLengthY IfcModulusOfRotationalSubgradeReactionSelect [0:1]

Rotational stiffness value about the y-axis of the coordinate system defined by the instance which uses this resource object.

  • 关于使用此资源对象的实例定义的坐标系y轴的旋转刚度值。
X
7 RotationalStiffnessByLengthZ IfcModulusOfRotationalSubgradeReactionSelect [0:1]

Rotational stiffness value about the z-axis of the coordinate system defined by the instance which uses this resource object.

  • 关于使用此资源对象的实例定义的坐标系z轴的旋转刚度值。
X

8.19.3.3  IfcBoundaryFaceCondition(边界面条件)

  • 描述线性弹性支承条件或连接条件。
  • 适用性:
  •           表面支撑和连接。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcBoundaryCondition
1 Name IfcLabel [0:1]

Optionally defines a name for this boundary condition.

  • (可选)定义此边界条件的名称。
X
IfcBoundaryFaceCondition
2 TranslationalStiffnessByAreaX IfcModulusOfSubgradeReactionSelect [0:1]

Translational stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object.

  • 使用此资源对象的实例定义的坐标系x方向上的平移刚度值。
X
3 TranslationalStiffnessByAreaY IfcModulusOfSubgradeReactionSelect [0:1]

Translational stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object.

  • 使用此资源对象的实例定义的坐标系y方向上的平移刚度值。
X
4 TranslationalStiffnessByAreaZ IfcModulusOfSubgradeReactionSelect [0:1]

Translational stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object.

  • 使用此资源对象的实例定义的坐标系z方向上的平移刚度值。
X

8.19.3.4  IfcBoundaryNodeCondition(边界节点条件)

  • 描述线性弹性支承条件或连接条件。
  • 适用性:
  •            点支撑和连接。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcBoundaryCondition
1 Name IfcLabel [0:1]

Optionally defines a name for this boundary condition.

  • (可选)定义此边界条件的名称。
X
IfcBoundaryNodeCondition
2 TranslationalStiffnessX IfcTranslationalStiffnessSelect [0:1]

Translational stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object.

  • 使用此资源对象的实例定义的坐标系x方向上的平移刚度值。
X
3 TranslationalStiffnessY IfcTranslationalStiffnessSelect [0:1]

Translational stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object.

  • 使用此资源对象的实例定义的坐标系y方向上的平移刚度值。
X
4 TranslationalStiffnessZ IfcTranslationalStiffnessSelect [0:1]

Translational stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object.

  • 使用此资源对象的实例定义的坐标系z方向上的平移刚度值。
X
5 RotationalStiffnessX IfcRotationalStiffnessSelect [0:1]

Rotational stiffness value about the x-axis of the coordinate system defined by the instance which uses this resource object.

  • 关于使用此资源对象的实例定义的坐标系x轴的旋转刚度值。
X
6 RotationalStiffnessY IfcRotationalStiffnessSelect [0:1]

Rotational stiffness value about the y-axis of the coordinate system defined by the instance which uses this resource object.

  • 关于使用此资源对象的实例定义的坐标系y轴的旋转刚度值。
X
7 RotationalStiffnessZ IfcRotationalStiffnessSelect [0:1]

Rotational stiffness value about the z-axis of the coordinate system defined by the instance which uses this resource object.

  • 关于使用此资源对象的实例定义的坐标系z轴的旋转刚度值。
X

8.19.3.4.1  例子: E.12.1 Structural curve member(结构曲线构件)

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  • 结构分析模型包括具有负载和边界条件的结构元件的理想化。

8.19.3.5 IfcBoundaryNodeConditionWarping(边界节点条件扭曲)

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  • 描述线性弹性支承条件或连接条件,包括线性弹性翘曲约束。
  • 适用性:
  •            点支撑和连接。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcBoundaryCondition
1 Name IfcLabel [0:1]

Optionally defines a name for this boundary condition.

  • (可选)定义此边界条件的名称。
X
IfcBoundaryNodeCondition
2 TranslationalStiffnessX IfcTranslationalStiffnessSelect [0:1]

Translational stiffness value in x-direction of the coordinate system defined by the instance which uses this resource object.

  • 使用此资源对象的实例定义的坐标系x方向上的平移刚度值。
X
3 TranslationalStiffnessY IfcTranslationalStiffnessSelect [0:1] Translational stiffness value in y-direction of the coordinate system defined by the instance which uses this resource object. X
4 TranslationalStiffnessZ IfcTranslationalStiffnessSelect [0:1] Translational stiffness value in z-direction of the coordinate system defined by the instance which uses this resource object. X
5 RotationalStiffnessX IfcRotationalStiffnessSelect [0:1]

Rotational stiffness value about the x-axis of the coordinate system defined by the instance which uses this resource object.

  • 关于使用此资源对象的实例定义的坐标系x轴的旋转刚度值。
X
6 RotationalStiffnessY IfcRotationalStiffnessSelect [0:1] Rotational stiffness value about the y-axis of the coordinate system defined by the instance which uses this resource object. X
7 RotationalStiffnessZ IfcRotationalStiffnessSelect [0:1] Rotational stiffness value about the z-axis of the coordinate system defined by the instance which uses this resource object. X
IfcBoundaryNodeConditionWarping
8 WarpingStiffness IfcWarpingStiffnessSelect [0:1]

Defines the warping stiffness value.

  • 定义扭曲刚度值。
X

8.19.3.6 IfcFailureConnectionCondition(故障连接条件)

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  • 定义支撑或连接失效时的力。
  • 适用性:
  •             点支撑和连接。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralConnectionCondition
1 Name IfcLabel [0:1] Optionally defines a name for this connection condition. X
IfcFailureConnectionCondition
2 TensionFailureX IfcForceMeasure [0:1] Tension force in x-direction leading to failure of the connection. X
3 TensionFailureY IfcForceMeasure [0:1] Tension force in y-direction leading to failure of the connection. X
4 TensionFailureZ IfcForceMeasure [0:1] Tension force in z-direction leading to failure of the connection. X
5 CompressionFailureX IfcForceMeasure [0:1] Compression force in x-direction leading to failure of the connection. X
6 CompressionFailureY IfcForceMeasure [0:1] Compression force in y-direction leading to failure of the connection. X
7 CompressionFailureZ IfcForceMeasure [0:1] Compression force in z-direction leading to failure of the connection. X

8.19.3.7 IfcSlippageConnectionCondition(滑动连接条件)

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  • 描述支撑条件或连接条件下的滑动。滑动意味着在支撑或连接反应被唤醒之前,支撑或连接可能发生相对位移。
  • 适用性:
  •            点式支架和连接件,
  •            曲线支撑和连接,
  •            表面支撑和连接。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralConnectionCondition
1 Name IfcLabel [0:1] Optionally defines a name for this connection condition. X
IfcSlippageConnectionCondition
2 SlippageX IfcLengthMeasure [0:1] Slippage in x-direction of the coordinate system defined by the instance which uses this resource object. X
3 SlippageY IfcLengthMeasure [0:1] Slippage in y-direction of the coordinate system defined by the instance which uses this resource object. X
4 SlippageZ IfcLengthMeasure [0:1] Slippage in z-direction of the coordinate system defined by the instance which uses this resource object. X

8.19.3.8 IfcStructuralConnectionCondition(结构连接条件)

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  • 描述更罕见的连接属性。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralConnectionCondition
1 Name IfcLabel [0:1] Optionally defines a name for this connection condition. X

8.19.3.9 IfcStructuralLoad(结构荷载)

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  • 这个抽象实体是结构分析产生的所有荷载(作用或反作用力)或某些要求,或影响结构分析的某些规定的超类型。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralLoad
1 Name IfcLabel [0:1] Optionally defines a name for this load. X

8.19.3.10 IfcStructuralLoadConfiguration(结构化负载配置)

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  • 此类在一维或二维配置中组合一个或多个载荷或结果值。
  • 非正式提议:
  • 1. 数值中的所有项目应为同一类型。
  • 2. 如果荷载或结果包括曲线活动,则应给出一维位置,并沿曲线进行局部测量。该位置不得超过曲线活动范围。荷载样本和相应位置应按位置的升序给出。
  • 3. 如果荷载或结果包括表面活动,则应给出二维位置,并在表面活动的局部x和y方向上进行测量。该位置不得超过表面活性的界限。
  • 注:二维情况下无订购要求,但为简单起见,一维情况下应按空间顺序排列。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralLoad
1 Name IfcLabel [0:1]

Optionally defines a name for this load.

  • (可选)定义此负载的名称。
X
IfcStructuralLoadConfiguration
2 Values IfcStructuralLoadOrResult L[1:?]

List of load or result values.

  • 负载或结果值的列表。
X
3 Locations IfcLengthMeasure ~L[1:?]L[1:2]

Locations of the load samples or result samples, given within the local coordinate system defined by the instance which uses this resource object. Each item in the list of locations pertains to the values list item at the same list index. This attribute is optional for configurations in which the locations are implicitly known from higher-level definitions.

  • 加载样本或结果样本的位置,在使用此资源对象的实例定义的局部坐标系内给出。位置列表中的每个项都属于同一列表索引中的值列表项。对于从更高级别的定义中隐式知道位置的配置,此属性是可选的。
X

8.19.3.11 IfcStructuralLoadLinearForce(结构荷载线性力)

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  • 实体IfcStructuralLoadLinearForce的实例应用于定义曲线上的动作。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralLoad
1 Name IfcLabel [0:1] Optionally defines a name for this load. X
IfcStructuralLoadOrResult
IfcStructuralLoadStatic
IfcStructuralLoadLinearForce
2 LinearForceX IfcLinearForceMeasure [0:1] Linear force value in x-direction. X
3 LinearForceY IfcLinearForceMeasure [0:1] Linear force value in y-direction. X
4 LinearForceZ IfcLinearForceMeasure [0:1] Linear force value in z-direction. X
5 LinearMomentX IfcLinearMomentMeasure [0:1] Linear moment(线性矩) about the x-axis. X
6 LinearMomentY IfcLinearMomentMeasure [0:1] Linear moment about the y-axis. X
7 LinearMomentZ IfcLinearMomentMeasure [0:1] Linear moment about the z-axis. X

8.19.3.12 IfcStructuralLoadOrResult(结构负荷或结果)

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  • 简单加载或结果类的抽象超类。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralLoad
1 Name IfcLabel [0:1] Optionally defines a name for this load. X
IfcStructuralLoadOrResult

8.19.3.13 IfcStructuralLoadPlanarForce(结构载荷平面力)

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  • 实体IfcStructuralLoadPlanarForce的实例应用于定义面上的动作。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralLoad
1 Name IfcLabel [0:1] Optionally defines a name for this load. X
IfcStructuralLoadOrResult
IfcStructuralLoadStatic
IfcStructuralLoadPlanarForce
2 PlanarForceX IfcPlanarForceMeasure [0:1] Planar force value in x-direction. X
3 PlanarForceY IfcPlanarForceMeasure [0:1] Planar force value in y-direction. X
4 PlanarForceZ IfcPlanarForceMeasure [0:1] Planar force value in z-direction. X

8.19.3.14 IfcStructuralLoadSingleDisplacement(结构荷载单位移)

  • 实体Ifcstructuralloaddingledisplace的实例应用于定义位移。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralLoad
1 Name IfcLabel [0:1] Optionally defines a name for this load. X
IfcStructuralLoadOrResult
IfcStructuralLoadStatic
IfcStructuralLoadSingleDisplacement
2 DisplacementX IfcLengthMeasure [0:1] Displacement in x-direction. X
3 DisplacementY IfcLengthMeasure [0:1] Displacement in y-direction. X
4 DisplacementZ IfcLengthMeasure [0:1] Displacement in z-direction. X
5 RotationalDisplacementRX IfcPlaneAngleMeasure [0:1] Rotation about the x-axis. X
6 RotationalDisplacementRY IfcPlaneAngleMeasure [0:1] Rotation about the y-axis. X
7 RotationalDisplacementRZ IfcPlaneAngleMeasure [0:1] Rotation about the z-axis. X

8.19.3.15 IfcStructuralLoadSingleDisplacementDistortion(结构荷载单位移变形)

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  • 使用扭曲定义置换。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralLoad
1 Name IfcLabel [0:1] Optionally defines a name for this load. X
IfcStructuralLoadOrResult
IfcStructuralLoadStatic
IfcStructuralLoadSingleDisplacement
2 DisplacementX IfcLengthMeasure [0:1] Displacement in x-direction. X
3 DisplacementY IfcLengthMeasure [0:1] Displacement in y-direction. X
4 DisplacementZ IfcLengthMeasure [0:1] Displacement in z-direction. X
5 RotationalDisplacementRX IfcPlaneAngleMeasure [0:1] Rotation about the x-axis. X
6 RotationalDisplacementRY IfcPlaneAngleMeasure [0:1] Rotation about the y-axis. X
7 RotationalDisplacementRZ IfcPlaneAngleMeasure [0:1] Rotation about the z-axis. X
IfcStructuralLoadSingleDisplacementDistortion
8 Distortion IfcCurvatureMeasure [0:1] The distortion curvature (warping, i.e. a cross-sectional deplanation) given to the displacement load. X
# Attribute Type Cardinality Description C
8 Distortion IfcCurvatureMeasure [0:1]

The distortion curvature (warping, i.e. a cross-sectional deplanation) given to the displacement load.

  • 位移荷载的变形曲率(翘曲,即横截面去平面)。
X

8.19.3.16 IfcStructuralLoadSingleForce(结构载荷单一力)

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  • 实体IfcStructuralAlloadsingleForce的实例应用于定义作用在单个点上的力和力矩。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralLoad
1 Name IfcLabel [0:1] Optionally defines a name for this load. X
IfcStructuralLoadOrResult
IfcStructuralLoadStatic
IfcStructuralLoadSingleForce
2 ForceX IfcForceMeasure [0:1] Force value in x-direction. X
3 ForceY IfcForceMeasure [0:1] Force value in y-direction. X
4 ForceZ IfcForceMeasure [0:1] Force value in z-direction. X
5 MomentX IfcTorqueMeasure [0:1] Moment about the x-axis. X
6 MomentY IfcTorqueMeasure [0:1] Moment about the y-axis. X
7 MomentZ IfcTorqueMeasure [0:1] Moment about the z-axis. X

8.19.3.17 IfcStructuralLoadSingleForceWarping(结构力扭曲)

www.vfkjsd.cn/ifc/ifc4/link/ifcidentifier.htmhttps://www.caxkernel.com/wp-content/uploads/2022/12/20221203211259-638bbbdb9f0b6.png?t=M1H3http://www.vfkjsd.cn/ifc/ifc4/link/ifcidentifier.htm

  • 实体IfcStructuralLoadSingleForceWarping的实例作为IfcStructuralLoadSingleForce的子类型,应用于定义单点上的操作。除了超类型定义的力和力矩外,还可以定义扭曲力矩。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralLoad
1 Name IfcLabel [0:1] Optionally defines a name for this load. X
IfcStructuralLoadOrResult
IfcStructuralLoadStatic
IfcStructuralLoadSingleForce
2 ForceX IfcForceMeasure [0:1] Force value in x-direction. X
3 ForceY IfcForceMeasure [0:1] Force value in y-direction. X
4 ForceZ IfcForceMeasure [0:1] Force value in z-direction. X
5 MomentX IfcTorqueMeasure [0:1] Moment about the x-axis. X
6 MomentY IfcTorqueMeasure [0:1] Moment about the y-axis. X
7 MomentZ IfcTorqueMeasure [0:1] Moment about the z-axis. X
IfcStructuralLoadSingleForceWarping
8 WarpingMoment IfcWarpingMomentMeasure [0:1]

The warping moment at the point load.

  • 扭曲的时刻的负载。
X

8.19.3.18 IfcStructuralLoadStatic(结构载荷静态)

www.vfkjsd.cn/ifc/ifc4/link/ifcidentifier.htmhttps://www.caxkernel.com/wp-content/uploads/2022/12/20221203211259-638bbbdb9f0b6.png?t=M1H3http://www.vfkjsd.cn/ifc/ifc4/link/ifcidentifier.htm

  • 抽象实体IfcStructuralLoadStatic是可以定义的所有静态载荷(作用或反作用)的超类型。范围内包括单一力(即集中力和力矩)、线性力(即一维分布力和力矩)、平面力(即二维分布力),以及位移和温度荷载。

Attribute inheritance

# Attribute Type Cardinality Description C
IfcStructuralLoad
1 Name IfcLabel [0:1] Optionally defines a name for this load. X
IfcStructuralLoadOrResult
IfcStructuralLoadStatic

8.19.3.19 IfcStructuralLoadTemperature(结构载荷温度)

www.vfkjsd.cn/ifc/ifc4/link/ifcidentifier.htmhttps://www.caxkernel.com/wp-content/uploads/2022/12/20221203211259-638bbbdb9f0b6.png?t=M1H3http://www.vfkjsd.cn/ifc/ifc4/link/ifcidentifier.htm

  • 实体IfcStructuralLoadTemperature的实例应用于定义由温度变化引起的动作。如图407所示,温度变化以一个恒定值给出,该恒定值适用于整个截面,以及截面外部纤维之间的温差值。

 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.

  • 影响结构构件完整截面或非均匀温度变化的均匀部分的温度变化。

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.

  • 注:正值表示温度升高。也就是说,正的恒定温度变化会导致构件伸长,或者如果存在相应的约束,则会导致构件受压
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.

  • 非均匀温度变化,规定为分析构件正y方向外纤维处的温度变化减去负y方向外纤维处的温度变化之差。

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.

  • 注:y中的正非均匀温度变化会导致构件在z附近产生负曲率,或在有相应约束的情况下,在z附近产生正弯矩。y和z是局部成员轴。
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.

  • 非均匀温度变化,规定为正z方向外纤维处的温度变化减去分析构件负z方向外纤维处的温度变化之差。

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.

  • 注:z中的正非均匀温度变化会导致构件在y附近的正曲率,或在有相应约束的情况下,在y附近的负弯矩。y和z是局部成员轴。
X

8.19.3.20 IfcSurfaceReinforcementArea(表面强化区)

www.vfkjsd.cn/ifc/ifc4/link/ifcidentifier.htmhttps://www.caxkernel.com/wp-content/uploads/2022/12/20221203211259-638bbbdb9f0b6.png?t=M1H3http://www.vfkjsd.cn/ifc/ifc4/link/ifcidentifier.htm

  • 描述表面构件所需或提供的加固区域。
  • 注:构件设计参数,如混凝土保护层、有效深度、网格或钢筋的方向(两个方向,可选三个方向)等未在IFCStructuralResource模式中指定。它们应在结构构件层面上进行规定。

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.

  • 位于表面构件正局部z方向一侧的构件表面钢筋。指定为每长度的面积,例如每米平方米(因此长度测量,例如米)。钢筋面积可指定为两个或三个方向的钢筋。
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.

  • 位于表面构件负局部z方向一侧的构件表面钢筋。指定为每长度的面积,例如每米平方米(因此长度测量,例如米)。钢筋面积可指定为两个或三个方向的钢筋。
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).

  • 抗剪钢筋。指定为每面积的面积,例如每平方米平方米(因此,比率测量,即无单位)。
X

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