Ling Ma (Lorin)
Lecturer at the University of Huddersfield.
Advanced Building Information Modeling
Information Interoperability
Guest lecturer: Dr. Ling Ma
Virtual Construction Lab
Technion - Faculty of Civil and Environmental Engineering
© 2016, Ling Ma
Language
שלום
© 2016, Ling Ma
Data Classification & Definition (OmniClass)
Construction Information Development Committee
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Information Definition
Orientation
Structural Performance
Many more ...
Function
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From Information to Decision-making
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Information Interoperability
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Information Interoperability - IFC
Information Delivery
© 2016, Ling Ma
Industry Foundation Classes (IFC)
- Domain layer
The highest layer includes schemas containing entity definitions that are specializations of products, processes or resources specific to a certain discipline, those definitions are typically utilized for intra-domain exchange and sharing of information.
- Interoperability layer
The next layer includes schemas containing entity definitions that are specific to a general product, process or resource specialization used across several disciplines, those definitions are typically utilized for inter-domain exchange and sharing of construction information.
- Core layer
The next layer includes the kernel schema and the core extension schemas, containing the most general entity definitions, all entities defined at the core layer, or above carry a globally unique id and optionally owner and history information.
- Resource layer
The lowest layer includes all individual schemas containing resource definitions, those definitions do not include an globally unique identifier and shall not be used independently of a definition declared at a higher layer.
© 2016, Ling Ma
Industry Foundation Classes (IFC)
Schema Development - Express Language
Simple
Data Type
Aggregation
Data Type
LIST [?:?]
E.g. Coordinates:
LIST [1:3] OF REAL
Entity
Data Type
ENTITY IfcCartesianPoint
SUBTYPE OF (IfcPoint);
Coordinates : LIST [1:3] OF IfcLengthMeasure;
...
END_ENTITY;
Defined
Data Type
TYPE IfcLengthMeasure = REAL;
END_TYPE;
- Entity Name
- Supertype/Subtype
- Attribute
© 2016, Ling Ma
Industry Foundation Classes (IFC)
ENTITY IfcPlacement
Location : IfcCartesianPoint;
...
END_ENTITY;
Schema Development - Express Language Exercise
How to model a Coordinates System
ENTITY IfcDirection
DirectionRatios : LIST [2:3] OF IfcReal;
...
END_ENTITY;
ENTITY IfcAxis2Placement3D
SUBTYPE OF (IfcPlacement);
Axis : OPTIONAL IfcDirection;
RefDirection : OPTIONAL IfcDirection;
...
END_ENTITY;
#902= IFCDIRECTION((1.,0.,0.));
#903= IFCDIRECTION((0.,1.,0.));
#901= IFCCARTESIANPOINT((0.,0.,0.));
#1001= IFCAXIS2PLACEMENT3D(#901,#902,#903);
© 2016, Ling Ma
Industry Foundation Classes (IFC)
Shape Representations ?
Brep
Swept solid
CSG
© 2016, Ling Ma
Industry Foundation Classes (IFC)
Shape Representations - CSG
ENTITY IfcBlock
SUBTYPE OF (IfcCsgPrimitive3D);
XLength : IfcPositiveLengthMeasure;
YLength : IfcPositiveLengthMeasure;
ZLength : IfcPositiveLengthMeasure;
END_ENTITY;
#1022= IfcBlock(#1001,1000.,1000.,2000.);
ENTITY IfcCsgPrimitive3D
Position : IfcAxis2Placement3D;
...
END_ENTITY;
Modeling a block
#1001= IFCAXIS2PLACEMENT3D(#901,#902,#903);
© 2016, Ling Ma
Industry Foundation Classes (IFC)
Shape Representations - Swept Solid
Modeling a block
© 2016, Ling Ma
Industry Foundation Classes (IFC)
Shape Representations - Brep
Modeling a block
© 2016, Ling Ma
Information Exchange and Collaboration
- Information Delivery Manual (IDM)
- Model View Definition (MVD)
- BIM Collaboration Format (BCF)
- Construction Operations Building Information Exchange (COBie)
© 2016, Ling Ma
IDM & MVD
Courtesy of Prof. Sacks
BCF
© 2016, Ling Ma
COBie Example
© Dr. Ling Ma
© 2016, Ling Ma
Summary
- Information interoperability
- Why IFC
- How IFC works
- Information exchange workflow
- IDM & MVD
- BCF
- COBie
Slides available at http://bit.ly/TechnionBIM
© 2016, Ling Ma
Enjoy BIM
© 2016, Ling Ma
Tutorial
- Get the program and read ifc file according to online document
- Sign up Trimble Connect account
- Update user profile
- Create a new project (choose EU server)
- Invite team members including me : lingma@technion.ac.il
- Download Revit plug-in and run Revit as administrator
- Publish your project to Trimble, see this tutorial
- Check model tree & property sets
- Function panels & create views
- Create ToDo list + assign + comment + change status
- Clash detection
- Visit help center
Advanced Building Information Modeling
By Ling Ma (Lorin)
