7.7.3.6 IfcStructuralAnalysisModel
IfcStructuralAnalysisModel (vfkjsd.cn)http://www.vfkjsd.cn/ifc/ifc4/schema/ifcstructuralanalysisdomain/lexical/ifcstructuralanalysismodel.htm
- Ifcstructuralanalysmodel用于收集表示结构分析模型所需的所有信息。它包含某些常规特性(例如分析类型)、对所有包含的结构构件、结构支撑或连接的引用,以及荷载和相应的荷载结果。
- 分析模型描述的重要功能源自现有IFC实体:↓
- 1. 从IfcSystem继承了通过IfcRelServicesBuildings将分析模型耦合到一个或多个必要的IfcBuildings的能力。
- 2. 它从IfcGroup继承反向属性IsGroupedBy,指向关系类IfcRelAssignsToGroup。这允许对属于特定分析模型的结构构件(IfcStructuralMember的实例)和支撑(IfcStructuralConnection的实例)进行分组。
- 注:荷载(作为IfcStructuralAction的实例)不包括在IsGroupedBy中。负载通过LoadedBy属性关系分配,使用负载组作为分组机制。通过LoadedBy只能引用顶级荷载组,即如果存在任何荷载组合,则引用荷载组合;如果此分析模型中不存在荷载组合,则引用荷载工况。
- 注:结果(作为IfcStructuralReaction的实例)不包括在IsGroupedBy中。结果通过HasResults属性关系分配,使用结果组作为分组机制。
- 通过指向关系类IfcRelNests,它从IfcObject继承反向属性isDeComposed。它提供了独立(部分)分析模型之间的层次结构。
- 非正式提议:
- 1. 如果一个或多个结构项(IfcStructuralItem子类型的实例)被分组到IfcStructuralAnalysisModel中,则应为属性SharedPlacement提供一个值。
- 2. 所有结构项的ObjectPlacement被分组到同一个Ifcstructuralanalysimodel实例中,应指的是与Ifcstructuralanalysimodel相同的IfcObjectPlacement实例。共享位置。
- 注:这条规则对于实现一致的拓扑表示是必要的。分析模型中结构项的拓扑表示旨在共享顶点和边,因此必须具有相同的对象放置。
- 注:一个结构项目可分为多个分析模型。在这种情况下,所有这些模型都必须使用相同的IfcObjectPlacement实例。
Attribute inheritance
# | Attribute | Type | Cardinality | Description | C |
---|---|---|---|---|---|
IfcRoot | |||||
1 | GlobalId | IfcGloballyUniqueId | [1:1] | Assignment of a globally unique identifier within the entire software world. | X |
2 | OwnerHistory | IfcOwnerHistory | [0:1] |
Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,
|
X |
3 | Name | IfcLabel | [0:1] | Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. | X |
4 | Description | IfcText | [0:1] |
Optional description, provided for exchanging informative comments.
|
X |
IfcObjectDefinition | |||||
HasAssignments |
IfcRelAssigns @RelatedObjects |
S[0:?] |
Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups.
|
X | |
Nests |
IfcRelNests @RelatedObjects |
S[0:1] |
References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical strutures only).
|
X | |
IsNestedBy |
IfcRelNests @RelatingObject |
S[0:?] |
References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types).
|
X | |
HasContext |
IfcRelDeclares @RelatedDefinitions |
S[0:1] |
References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object.
|
X | |
IsDecomposedBy |
IfcRelAggregates @RelatingObject |
S[0:?] |
References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definitions can be aggregated by several other objects (occurrences or parts).
|
X | |
Decomposes |
IfcRelAggregates @RelatedObjects |
S[0:1] |
References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definitions can only be part of a single decomposition (to allow hierarchical strutures only).
|
X | |
HasAssociations |
IfcRelAssociates @RelatedObjects |
S[0:?] |
Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification.
|
X | |
IfcObject | |||||
5 | ObjectType | IfcLabel | [0:1] |
The type denotes a particular type that indicates the object further. The use has to be established at the level of instantiable subtypes. In particular it holds the user defined type, if the enumeration of the attribute PredefinedType is set to USERDEFINED.
|
X |
IsDeclaredBy |
IfcRelDefinesByObject @RelatedObjects |
S[0:1] |
Link to the relationship object pointing to the declaring object that provides the object definitions for this object occurrence. The declaring object has to be part of an object type decomposition. The associated IfcObject, or its subtypes, contains the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes.
|
X | |
Declares |
IfcRelDefinesByObject @RelatingObject |
S[0:?] |
Link to the relationship object pointing to the reflected object(s) that receives the object definitions. The reflected object has to be part of an object occurrence decomposition. The associated IfcObject, or its subtypes, provides the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes.
|
X | |
IsTypedBy |
IfcRelDefinesByType @RelatedObjects |
S[0:1] |
Set of relationships to the object type that provides the type definitions for this object occurrence. The then associated IfcTypeObject, or its subtypes, contains the specific information (or type, or style), that is common to all instances of IfcObject, or its subtypes, referring to the same type.
|
X | |
IsDefinedBy |
IfcRelDefinesByProperties @RelatedObjects |
S[0:?] |
Set of relationships to property set definitions attached to this object. Those statically or dynamically defined properties contain alphanumeric information content that further defines the object.
|
X | |
IfcGroup | |||||
IsGroupedBy |
IfcRelAssignsToGroup @RelatingGroup |
S[0:?] |
Reference to the relationship IfcRelAssignsToGroup that assigns the one to many group members to the IfcGroup object.
|
X | |
IfcSystem | |||||
ServicesBuildings |
IfcRelServicesBuildings @RelatingSystem |
S[0:1] |
Reference to the building spatial structure via the objectified relationship IfcRelServicesBuildings, which is serviced by the system.
|
X | |
IfcStructuralAnalysisModel | |||||
6 | PredefinedType | IfcAnalysisModelTypeEnum | [1:1] |
Defines the type of the structural analysis model.
|
X |
7 | OrientationOf2DPlane | IfcAxis2Placement3D | [0:1] |
If the selected model type (PredefinedType) describes a 2D system, the orientation defines the analysis plane (P[1], P[2]) and the normal to the analysis plane (P[3]). This is needed because structural items and activities are always defined in three-dimensional space even if they are meant to be analysed in a two-dimensional manner.
|
X |
8 | LoadedBy | IfcStructuralLoadGroup | S[1:?] |
References to all load groups to be analyzed.
|
X |
9 | HasResults | IfcStructuralResultGroup | S[1:?] |
References to all result groups available for this structural analysis model.
|
X |
10 | SharedPlacement | IfcObjectPlacement | [0:1] |
Object placement which shall be common to all items and activities which are grouped into this instance of IfcStructuralAnalysisModel. This placement establishes a coordinate system which is referred to as 'global coordinate system' in use definitions of various classes of structural items and activities.
|
X |
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