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08/12/2017 BIM FOR HERITAGE
BIM FOR HERITAGE: “STEPPING INTO THE FUTURE WITH THE PAST” HYBRID MODELLING IN THE BIM PROCESS CARL BROOKES 8 DECEMBER 2017
08/12/2017 BIM FOR HERITAGE
INTRODUCTION
Very quick summary of BIM process – Comparing New build with existing assets
3D model and drawing production
• Different processes and drivers
• What is Hybrid modelling and BIM?
1. Harmondsworth barn • The application of BIM within a heritage context
• Research project for Historic England – covering some relevant topics
2. Kings cross, the lighthouse building
• BIM contributed to unlocking this project
08/12/2017 BIM FOR HERITAGE
ENGINEERING SIMULATION MY BACKGROUND
08/12/2017 BIM FOR HERITAGE
DEMOLITION WITHOUT UNDERSTANDING BEHAVIOUR
Blarnacrag Viaduct, UK
08/12/2017 BIM FOR HERITAGE
THE RISK DEMOLITION WITHOUT BRACING
DEMOLITION WITH BRACING MODIFICATION TO RESTRAIN MASONRY VIADUCT
08/12/2017 BIM FOR HERITAGE
BIM PROCESS – COMPARING NEW BUILD WITH EXISTING ASSETS A VERY QUICK SUMMARY OF THE PROCESS
Reproduced from PAS 1192-2:2013 Specification for information management for the capital/delivery phase of construction projects using building information modelling
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NEW BUILD BIM - THE INFORMATION DELIVERY CYCLE
Benefits of the new-build process are being recognised
Challenges influencing uptake may relate to CaPex investment expected yet Opex receives greatest benefits
Handover of Project Information Model (PIM) becomes the Asset Information Model (AIM)
Reproduced from PAS 1192-2:2013 Specification for information management for the capital/delivery phase of construction projects using building information modelling 08/12/2017
BIM FOR HERITAGE
EXISTING AND HERITAGE SITES
Benefits of BIM are less clear
There is no handover asset information model (AIM)
Existing information is likely to be a combination of forms, reports, sketches, 2D CAD etc..
Asset database in use, for instance Tribal K2
Some sort of spatial framework/model will need to be produced
Reproduced from PAS 1192-3:2014 Specification for information management for the operational phase of assets using building information modelling
Significant conservation activities
Ongoing conservation activities
08/12/2017 BIM FOR HERITAGE
3D MODEL AND DRAWING PRODUCTION DIFFERENT PROCESSES AND DRIVERS
Point cloud RGB
3D geometry model
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TOWARDS AUTOMATION ARCHITECTURE, STRUCTURES, MEP, CIVILS, HERITAGE
Automated extraction of walls and services for an existing building for use within BIM
Automated extraction of plant within an industrial facility
Typical existing building Revit model
Existing traffic gantries
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BIM TYPICAL PROJECTS
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TYPICAL SIMULATION
DRIVEN PROJECT
POINT CLOUD OF MARY ROSE
HULL 3D laser scanning – point cloud
Geometry model
AS A FEED TO BIM - MESHING DETAILED FORMS
Generated with VRMesh
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3D MODEL USED BY OTHER DISCIPLINES: MARY ROSE NUMERICAL SIMULATION OF ATMOSPHERE USING CFD
08/12/2017 BIM FOR HERITAGE
POINT CLOUD TO REVIT MODELS
Conventional process Existing environment scanned, modelled, and new equipment designed and accurately fitted. Reduces risk of expensive snags during construction
Better process and very relevant to BIM for heritage Planning tunnel strengthening Use of hybrid environment to avoid modelling
POINT CLOUD APPLICATIONS WITHIN HYBRID CAD
08/12/2017 BIM FOR HERITAGE
HARMONDSWORTH BARN THE APPLICATION OF BIM WITHIN A HERITAGE CONTEXT
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HARMONDSWORTH BARN & THE IRON BRIDGE
Grade I listed Oak framed barn built in 1426
Grade I listed. Spans the River Severn built in 1779
08/12/2017 BIM FOR HERITAGE
NEW AND TRADITIONAL MEASUREMENT RAPIDLY GROWING DATA ACQUISITION METH0DS
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CLASSIFICATION OF SURVEY TECHNIQUES AND PROCESSES
Generally mass data collection
• Point clouds
• Direct or processed
Classes based on
• Range and point cloud density
• Typical cost (low, medium high)
Potential application given
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08/12/2017 BIM FOR HERITAGE
LEVEL OF DETAIL (HARMONDSWORTH BARN EXAMPLE)
LoD based on
• Potential uses
• Model tolerance
• Listing grade
Once LoD is established survey class provides options for measurement and data acquisition methods
Higher LoDs have object based geometry modelling
Similar tables produced for 2D information, archive drawings, sketches, 2D CAD
Simple viewers are important too for desktop inspection
08/12/2017 BIM FOR HERITAGE
LEVEL OF DETAIL – HARMONDSWORTH BARN EXAMPLE LoD 1 L1 - Ground based photogrammetry
LoD 3 M3 - Static tripod supported laser scanners
08/12/2017 BIM FOR HERITAGE
HYBRID ENVIRONMENTS It is often impossible, within reasonable effort, to represent existing assets with new-building BIM tools.
Living bridges of India
08/12/2017 BIM FOR HERITAGE
LEVEL OF DETAIL – HYBRID ENVIRONMENTS (HARMONDSWORTH BARN EXAMPLE) As before, LoD based on:
• Potential uses
• Model tolerance
• Listing grade
Once LoD is established survey class provides options for measurement and data acquisition methods
Big advantage – no object based geometry modelling of existing fabric
Spatial framework for tagging information (links)
08/12/2017 BIM FOR HERITAGE
LoD H1 EXAMPLE POINT CLOUDS WITH LINKS TO SUPPORTING MATERIAL
LoD H3
L3 - Low resolution, medium range handheld laser scanners
Shows proposed new beam/tie
Software: ReCap, Revit
08/12/2017 BIM FOR HERITAGE
WORKING IN A HYBRID ENVIRONMENT ONLY INTERVENTION AND POSSIBLY INTERPHASE MODELLED AS OBJECTS
Software:
Revit and Recap
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COMPARING DATASETS TIME DEPENDANT DATA IS IMPORTANT
Useful to track major changes
• Missing parts and new additions
Image compares laser point clouds from 2013 pre-conservation with 2015 post-conservation
• Red indicates parts removed
Software:
Pointools V8i, CloudCompare, in-house post-processing software
08/12/2017
BIM FOR HERITAGE
COMPARING DATASETS SMALL CHANGES
Monitoring small changes
• Condition monitoring
Image compares point clouds from 2013 pre-conservation photogrammetry with 2015 post-conservation
08/12/2017 BIM FOR HERITAGE
KINGS CROSS, THE LIGHTHOUSE BUILDING BIM CONTRIBUTED TO UNLOCKING THIS PROJECT
08/12/2017 BIM FOR HERITAGE
KINGS CROSS, THE LIGHTHOUSE BUILDING
08/12/2017 BIM FOR HERITAGE
KINGS CROSS, THE LIGHTHOUSE BUILDING
08/12/2017 BIM FOR HERITAGE
POINT CLOUDS AND LASER AIDED MODELLING
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08/12/2017 BIM FOR HERITAGE
POINT CLOUD
08/12/2017 BIM FOR HERITAGE
POINT CLOUD
08/12/2017 BIM FOR HERITAGE
POINT CLOUD
08/12/2017 BIM FOR HERITAGE
STRUCTURAL ANALYSIS
08/12/2017 BIM FOR HERITAGE
BIM – EXISTING AND PROPOSED
08/12/2017 BIM FOR HERITAGE
MONITORING COMPARING POINT CLOUDS – MAJOR CHANGES
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KINGS CROSS, THE LIGHTHOUSE BUILDING
08/12/2017 BIM FOR HERITAGE
SIMPLER WAYS OF VIEWING 3D DATA SETS AND BIM
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3D PANORAMIC VIEWERS BIM MODELS, BIG DATA SETS AND SIMULATION RESULTS
Energy from waste example
showing BIM model (top),
simplified model,
numerical mesh,
predicted air temperature
results
Point cloud, photography and monitoring data
RAMView360 link
08/12/2017 BIM FOR HERITAGE
3D PANORAMIC VIEWERS BIM MODELS, BIG DATA SETS AND SIMULATION RESULTS: ‘RAMVIEW360’
RAMView360 is a tool developed by Engineering Simulation Team in Ramboll UK. It allows anyone to view 3D BIM models, big data sets and simulation results all within a web browser
08/12/2017 BIM FOR HERITAGE
LINKED PANORAMIC VIEWERS ENHANCED DRAWING CONTENT
RAMView360 link
Link to BIM model to provide additional information on phone or tablet
(Limited access Beta version)
08/12/2017 BIM FOR HERITAGE
Browser example - link to BIM model to provide additional information on phone or tablet
RAMView360 link (Limited access Beta version)
LINKED PANORAMIC VIEWERS ENHANCED DRAWING CONTENT