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Auf Wissen bauen

Building Information Modeling

Gunnar Grün, Munich, 7.3.2018

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Building Information Modeling (BIM)towards the uniform central building model

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BIM today (1)

Used for visualization

Reception as BIM being complex 3D CAD

Yet most used data exchange format is PDF

Models are provided as product catalogue

BIM properties retrieved from producer

Layers are used to separate domain models

Calculations performed on models

Collision check

Quantity take-off

Costs

Quelle: associated-architects.co.uk

Quelle: mepcor.com

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BIM today (2)

BIM mostly applied little & closed

Quality issues with IFC data

Responsibilities and liabilities

Quelle.: AEC3 Deutschland GmbHQuelle: Autodesk.com

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BIM today (3)

Undefined level of detail in building lifecycle

Uncertain input parameters for calculations and predictions

Data quality and depth of information according to usage scenario and field of application

City, district, building, room, …

Quelle: ibpsa-germany.org

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Digitalization in the Construction SectorTwo Challenges

Change in Process

More information at different level of details available, thus: decisions canbe made earlier and more substantiated

Current business models (e.g. variations) will be overcome by new ones, thus: cooperation will change

Much innovation potential along the process

Interoperability of Stakeholders

Very many very small enterprises

Very many specialised tools and established tool chains

interfaces for exchange of data and information

Big open BIM required

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BIMiDBIM Referenzobjekt in Deutschland

Objective: Demonstration andEvaluation of the BIM method on two construction projects.

Approach: Analysis of applicationmethods, work organisation, useracceptability, contract design, etc.

Results:

Model based, integral design ismore efficient

prerequisite: early decision to useBIM and involvement of all parties

»BIM reference process«

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BIM-Reference-Building-ProcessHOAI Leistungsphase 3

© Fraunhofer IBP in Zusammenarbeit mit AEC3 Deutschland GmbH und Abstimmung mit AHO e.V.

© Fraunhofer IBP

BIM-Reference-Building-ProcessHOAI Leistungsphase 3

© Fraunhofer IBP in Zusammenarbeit mit AEC3 Deutschland GmbH und Abstimmung mit AHO e.V.

Owner

Architect

Engineers

BIM-Manager

© Fraunhofer IBP

BIM-Reference-Building-ProcessHOAI Leistungsphase 3

© Fraunhofer IBP in Zusammenarbeit mit AEC3 Deutschland GmbH und Abstimmung mit AHO e.V.

Quality Control

Design CoordinationCommunication

BIM ExecutionPlan

CompletenessChecking

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actors tools figures

Energy demand

LCA/LCC

Daylight

Moisture mgmt.

Air quality

IBP 18599

IBP WUFI®

IBP VEPZO

IBP Generis

DIALux

owner

architect

planner

engineer

Ideal Planning Process

Proof anddocumentation

BIM

BIM as central information source

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Novel approach combines existing solutionsIBP:Connect

Smart service for handling complex information flow in planning, construction and operation

Changing multi-disciplinary project teams with specialized tools and expert knowledge

Efficient information management for integrated planning and optimization

Combination of disciplines, F&E services and tools

Data foundation for prediction of operations phase of building

Systems behaviour modeling and simulation

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IBP:Connect Platform

Information access via Linked Data Space

Data representing construction, materials, system operations, space usage

Association of differenttypes of content

Functional elements

Physical and technical parameters

Standard and default values

Traceability of simulation results

Key performance indicator assessment

Building Design Data Space

Tool

BIM Tool

Empirical Data Akquisition

Integrated Performance Assessment

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IBP:Connect example IBP:18599

Specification of input dat

Formatting and quality of data

Model View Definition (MVD)

Database interface

(Neuberg, Rank, Ekkerlein; 2001)

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Interoperability for building performance simulation

Information Delivery Manual (IDM) defining interactions e.g.

Conductive heat loss

Heating energy / Primary energy demand

Ventilation

Thermal comfort / Illumination analysis

Fire protection

…

Export Import

SimulationModel

BIMDomainModel

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BIM Projects EnEff-BIM / IEA EBC Annex 60

Data conversion from BIM to Modelica language

Building energy performance simulation

Methods for further analysis and exchange of BIM data

Co-Simulation and workflow automation

Validation and demonstration projects at the levels of building, districts and systems operation

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FMoperation

model

New builtdesign model

stockstockmodel

implementation

as-is-model

Modification

Retrofitmodel

ConnectivityConstructio

n 4.0

DemolitionRecycling,

LCA

Central data model

Vision of the digital building twin