1. Development Concept of IfcBridge Extension in Korea

2. 1. Extension Concept of IfcRoad & IfcBridge
Target, Scope and Level of IfcRoad Extension
In Scope
Out of Scope
Target
Level
View
Usecase
Road Facilities : Road, Drainage, Subsidiary Facilities
Detailed Design Phase
Geometry Shape Representation of Object, Components and Basic Attributes
Delivering 3D Design Data to Government
(National Road Authority of Korea)
Architecture/Mechanical/Electrical/Communication/Landscape
Planning, Construction, Maintenance -
Structural Analysis etc.

3. 1. Extension Concept of IfcRoad & Bridge
Extension Standards (1/2)
Classification Basis of Entities to be Extended
a. Analysis of Common WBS in Road Projects
b. Analysis of Hierarchical Structure in IFC
Both of two are including a similar hierarchical structure
Space, Physical Facilities/Elements (Civil Element), Facility/Element Type (Civil Element Type), Parts/Components, Materials etc.

4. 1. Extension Concept of IfcRoad & Bridge
Extension Standards (2/2)
Components/Parts/Materials (Resource Layer) : Addition to Common and Architectural Class in Current IFC4
Space/Physical Facilities/Elements : Only for Civil Facilities (Linear Alignment/ Topography Space, Civil Facilities/Elements)
Pavement/ Subsidiary Facility : Define as Common Elements of Facilities within IFC schema to be extended for Road Structures (Civil Facilities) (Elements that All Facilities include commonly)
Drainage Facility : Required Review If Distribution Entities for Architecture can be Shared with Drainages for Civil or not (Extension of Drainage for Architecture?)
Definition Criteria of Schema
Shape Entities/Attributes Reference Basis : Road Design Handbook, Road Design Standard, Road Geometrical Structure Design Guideline etc.
Hierarchical Structure Definition Criteria : Common WBS (Work Breakdown Structure) for Road Projects
Definition Criteria of Overall Entities : Reference Models (LandXML, JHDM etc.) + Hierarchy Definition Basis + Reference Material by Road Facility (2D Drawings, 3D Modeling S/W)

5. Infra BIM requirements
2. Approaches of IfcBridge Extension
IfcBridge Extension Process
Design Guide/Handbook Analysis
Infra BIM
Information
Requirements
Road Design
Guide/
Handbook
Terminology
Dictionary,
WBS I F C A N L Y S s
IFC 4 Analysis
BIM Design S/W
For Road & Bridge
Detailed Elements Extraction
(Alignment / Bridge Structure)
Gap analysis between
Infra BIM requirements
and IFC 4
Drawings, Statements
QTO Table
Schedule
Reference
Data
Analysis
IFC core
Extension
IFC core-based
Infra BIM Schema
Reference Model
Analysis
BIM Library
Infra BIM Specification
GIS Mapping Model
Analysis
<Discussion on the
IFC Structure Extension Method>
<Top level Extension of IFC– Space, Structures/Elements>

6. Steel Box(STB) Girder Type Bridge
2. Approaches of IfcBridge Extension
Development Perspective : Common bridge elements extraction that can be utilized for diverse type of bridge without considering specific bridge types
Element analysis of each detailed 2D & 3D drawings
WBS Element Hierarchy Analysis(Common Bridge WBS)
Floor slab
Diaphragm
Upper Flange
Upper Flange
Web plate
Cross Beam
Lower Flange
Steel Cable
PSC Beam
Stiffener
IPC Girder Type Bridge
Steel Box(STB) Girder Type Bridge

7. 2. Approaches of IfcBridge Extension
Extenstion Process 1 2 3 4
Classification by considering activity unit of WBS for Road as an object
Extraction of detailed element from detailed design drawings
(1st Level Bridge in Korea : PSC Girder Bridge/ 2nd Level Bridge : STB Girder)
Supplementation by analyzing road design standards
Categorization of bridge entity schema based on IFC
(Dr. Kim : Bridge+ France : Cable-stayed bridge)
Completion of final bridge entities based 1,2,3 process
Schema development by arranging entities on IFC core structure

8. 2. Approaches of IfcBridge Extension
Bridge Entity List

9. 2. Approaches of IfcBridge Extension
Bridge Entity Type List

10. IfcBridgeElement_K Extension
2. Approaches of IfcBridge Extension
Structure of Bridge Element in IFC4
IfcBridgeElement_K Extension

11. 2. Approaches of IfcBridge Extension
Bridge : Express-G for IfcBridgeElement_K
Defined by extending existing IFC types such as approach slab, chest wall, wing wall, and foundation etc.

12. 2. Approaches of IfcBridge Extension
11 Pset List of Bridge : Basic Parameter Base

13. 3. IfcBridge Verification
IfcBridge Schema Verification
by Converter and Viewer

14. Thank you for your attention!!