Column IfcColumn IfcColumn Foundation IfcFooting IfcPile

Column ifccolumn ifccolumn foundation ifcfooting

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Column IfcColumn. IfcColumn, IfcColumnStandardCase. Foundation IfcFooting, IfcPile. IfcFooting, IfcPile. Slab IfcSlab, IfcRoof. IfcSlab, IfcRoof, IfcSlabStandardCase, IfcSlabElementedCase. Stair IfcStair, IfcStairFlight. IfcStair, IfcStairFlight. Wall IfcWall, IfcWallStandardCase. IfcWall, IfcWallStandardCase, IfcWallElementedCase. Reinforcement IfcReinforcingBar, IfcReinforcingMesh, IfcTendonAnchor, IfcTendon. IfcReinforcingBar, IfcReinforcingMesh, IfcTendonAnchor, IfcTendon.
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Journal of Civil Engineering and Management, 2019, 25(6): 559–575 567 directly queried from IFC instances referenced by Ifc- Beam, including ID, object type, location, shape, cross sec- tion, and length; and inverse attributes (including material, strength grade, connection, and reinforcement informa- tion) need to be represented by other IFC entities which are associated through IFC relation entities. For example, the beam material in the ER Matrix can be represented by the IfcMaterial entity, which is associated with IfcBeam through IfcRelAssociatesMaterial (as shown in Figure 7). The attributes of other structural objects can be extracted from the IFC model through the similar mapping mecha- nism. According to the proposed mapping between ERs and IFC-based structural information, the required informa- tion can be automatically queried and exported from IFC models. This data-processing process helps users avoid wasting time to understand the complex data structure in IFC schema. 2. Development of the delivery tool of structural design information To automatically deliver the required objects and their attributes of structural models, this study developed an IFC-based delivery tool with four modules: IfcReader, Er- 2StruIfc, IfcWriter, and ReportWriter. As depicted in Fig- ure 8, this method includes the following steps to generate exchange model of structural design: 1. Define the ER Matrix: the structural engineer can directly use or modify the existing ER Matrix to Table 4. Definitions of required attributes in the ER Matrix Required attribute Target IFC data Attribute value IFC relation entity ID IfcRoot.GlobalId String (22) Fixed Object type IfcObject.ObjectType IfcLabel Location IfcProduct.ObjectPlacement IfcLocalPlacement Shape IfcProduct.Representation IfcShapeRepresentation Cross section IfcProfileDef IfcPositiveLengthMeasure Length/Height/Thickness IfcExtrudedAreaSolid.Depth IfcPositiveLengthMeasure Material IfcMaterial IfcLabel IfcRelAssociatesMaterial Strength grade IfcPropertySingleValue IfcValue IfcRelDefinesByProperties Connection IfcElement.ConnectedTo IfcElement IfcRelConnectsElements Reinforcement info. IfcElementAssembly IfcElement IfcRelAggregates Figure 7. Required attributes of IfcBeam in EXPRESS-G language (IFC2x3)
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568 H. Lai et al. Exchange requirement-based delivery method of structural design information for collaborative design ...
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