bim who benefits? - integrated environmental solutions · • bim (building information modelling)...
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BIM Who Benefits?Integration between Engineers and Architects
CIBSE Conference 2nd December 2010
• BIM (Building Information Modelling)
− A process of generating and managing building data during its life
cycle. It uses three-dimensional, real-time, dynamic building
modelling software to increase productivity in building design,
construction and maintenance period.
− “ A model-based technology linked with a database of project
information” according to American Institute of Architects
What is BIM?
• Multiple models into a “composite model”
What is BIM?
Energy
Model
Composite
Model
Architectural
ModelStructural
Model
Electrical
Model
Plumbing
Model
BIM
(linked with phasing,
sequencing,
construction
schedule)
Mechanical
Model
• Graphical information
-3D objects visual in the
model
• Non-graphical
information
- Performance data
• Linked information
- Schedule & cost
informationCost Model
Compliance
Model
Other Model
BIM process- a collaborative process
Building Owner f
ArchitectureContractor
Civil Engineering
Facilities Manager
Construction
Manager
Electrical Engineer
Mechanical EngineerBIM f
Integrated Design Process
Conventional design process
Building design process
Master
Planning
Concept
Design
Schematic
Design
Detailed
Design
Completion In use
Performance analysis
tool
Contractors,
construction manager,
commissioning
authority, cost
estimator
Mechanical,
electrical, & civil
engineers
Mainly architect ,
structural engineer &
clients
Planning staff,
clients
community member
Architect & clients
A linear design process
Users
Conventional design process
Construction
Tender documentation
Detailed Design
Schematic Design
Concept Design
Consultation
& Engagement
Project start
completion
ConstructionConstruction
Documents
Detailed
Design
Schematic
Design
Time
Eff
ort
Integrated design process
Building design process
Traditional
Eff
ort
Time
Construction
Documents
Detailed
Design
Schematic
Design
Construction
Key elements of integrated design process
• Inter-disciplinary collaboration between architects,
engineers, cost consultants and facility managers
from the beginning of the design process
• Discussion of the various important performance
issues and the establishment of a consensus on this
matter between client and designers
• Budget restrictions applied at the whole building
level, with no strict separation of budgets for
individual building systems.
• Involvement of specialists (e.g. energy engineering,
energy simulation, daylighting, comfort)
• Data sharing
• Clear articulation of performance targets and
strategies, to be updated throughout the process by
the design team
• Documentation and transparency of design
decisions
Integrated design process
Building
de
sig
n
A multi-
disciplinary
design
team
Concept design
Completion
process
Building
Conceptual
modelling
Predictive/incentive
modellingCompliance
modelling
A multi-disciplinary design
team
•Landscape architect
•Ecologist
•Architect
•Energy specialist
•Structural engineering
•Civil engineering
•Mechanical engineer
•Electrical engineer
•Plumbing engineer
•Other specialists(fire, acoustics,
daylighting, controls, etc.)
•Facility manager
•Contractor
•Construction manager
•Cost estimator
Building design process
Building design process
Master
Planning
Concept
Design
Schematic
Design
Detailed
Design
Completion In use
Climate
Locality
Site features
Nat resources
Urban form
Urban solar
Urban light
Visualise
Brief consequences
Building type
Climate & bldg type
Building form
Footprint headlines
Headline design
directions
Headline
sustainability
directions
Visualise
Baseline solution
Baseline outcomes
Footprint
Scheme directions
Building solar
Building light
Renewable directions
Sustainability
directions
Basic loads
Compliance
directions
Visualise
Brief refinement
Detail definitions
Systems
HVAC
Air flows
Building detail
feature design
Loads – steady state
Energy – dynamic
Plant size
Optimisation
Energy compliance
Sustainability
compliance
Certification
CFD etc studies
Visualise
Certification
Energy in use
Re-certification
Controls
Re-furbish & improve
Integrated approach to project delivery
<Virtual Environment> model
of the Scottish Parliament
Building
Project location: Glasgow
Master planning
What if climate
change?
2050?
Integrated approach to project delivery
<Virtual Environment> model
of the Scottish Parliament
Building
Concept design
Sketch model
VE model
VE models with different glazing percentage
Integrated approach to project delivery
Schematic design
VE model
with 20%
glazing Suncast
EPC
Thermal result
Radiance
MacroFlo
Apache System
Integrated approach to project delivery
Detailed design
CFD
HVAC Cost Plan
Suncast
Simulex
EPC
Radiance
Model Merge
Original Model
Room Data
New Model
Room Data
• Changes to Imported Geometry are Updated in <VE> Model
Without Overwriting Input Data
• Autodesk Revit Architecture 2008, 2009, 2010, 2011
• Autodesk Revit MEP 2008, 2009, 2010, 2011
• ArchiCAD via gbXML
•Microstation, Allplan via gbMXL
•Google Sketchup 6 & 7
• Google Sketchup Pro 6 & 7
The benefits….
…don‟t have to rebuild geometry to run analysis
…the potential to change the dialog between architects and engineers
What software does IES work with?
Graphisoft ArchiCAD gbXML
Other gbXML
IES VE: Autodesk Revit Plug-in Updates
gb
XM
L<
VE
>
How it works:
1. Draw Geometry in Autodesk Revit
2. From the Revit Toolbar:
• Set Building Location
• Define Building Parameters:
• Building Type• Construction Materials• Building System Types• Room Types
3. Launch IES VE-Toolkits/VE-Pro
4. Choose Analysis Type
gbXML Hierarchy
Adjacencies
Adjacencies
We spoke about the importance
of „rooms‟. Within Revit, you can
define a wall to be an exterior
wall, but this will mean nothing
when it comes to the gbXML
translation. The only way a wall
is recognized as an exterior vs
an interior wall is by their
adjacencies.
So for an element to be defined
as ground floor slab, it is a
horizontal surface adjacent to a
room (otherwise it is a shading
device) that is not in contact with
any room below. For a floor, it‟s
a horizontal surface that is in
contact with a room above and
below. For a roof, it‟s a
horizontal surface that is not in
contact with any room above.
Exterior walls are vertical
surface that is not in contact with
an adjacent room on one side
Adjacencies
Keep It Simple
Keep your geometry as simple as possible!
• Is this geometry absolutely necessary for the type of analysis I am
running?
• Can I eliminate anything from my model? (Purge unused, etc)
• There are often thousands of shading surfaces in a Revit file. If you are
doing a daylight analysis, are the 4 cm mullions going to affect the
outcome? They will affect the runtime significantly.
Basic Modelling - Columns
Basic Modelling – Problem Wall Conditions
Basic Modelling – Problem Wall Conditions
Basic Modelling – Shading Elements
Basic Modelling – Openings
IES VE: gbXML “Healing Tools”
<Virtual Environment> Software Suite Integrated sustainable building design analysis toolsDr Sarah Graham ([email protected])
Integrated sustainable design approach
In useMaster
Planning
Concept
Design
Schematic
Design
Detailed
Design
Completion
• Design team interoperability throughout the entire design process
− Each tier provides tailored access to specific types of analysis at each building design stage
Building design process
VE Ware
VE Toolkits
VE Gaia
VE Pro
VE Ware
VE Toolkits
Integrated sustainable building design toolDesign team interoperability throughout the entire design process Architects design for sustainability using same underlying calculations as Engineer
Architects use early design stage tools; Engineers use detail design stage tools
Impacts shared and understood by entire design team
Climate & change
Bio-climate
Urban analysis
Site analysis
Built form
Building analysis
Compliance
LEED, BREEAM etc
Operation
The Gaia Bioclimate
Tool takes it further ...
Urban design
Macro issues
Built form
And further still ...
Layout
Construction
Shading
Ventilation
Measures
Bioclimate
Climate Change
VE-Gaia: Concise ReportingAutomated reportage & guidance tool Get to data fast; macros speed retrieval of the most important results
Interactive reporting allows “problem-issues” to be highlighted
Guidance within the reportage avoids abortive work
how valuable is the available solar, wind and rain resource
it is about initially getting a feel for the numbers involved how big an impact natural resources can realistically make
Skin or internal gain dominated? Appropriate for passive strategies?
Number of spaces close to an open-able window?Key metrics – glazed area, dominant glazed orientation
VE-Gaia: Concise ReportingAutomated reportage & guidance tool Get to data fast; macros speed retrieval of the most important results
Interactive reporting allows “problem-issues” to be highlighted
Guidance within the reportage avoids abortive work
Water usage calculation% Impact of water usage reduction:
black / grey / rain waterlow flush etc
VE-Gaia: Concise ReportingAutomated reportage & guidance tool Get to data fast; macros speed retrieval of the most important results
Interactive reporting allows “problem-issues” to be highlighted
Guidance within the reportage avoids abortive work
early stage renewables feasibilitywhich renewable works best
rank appropriateness
VE-Gaia: Concise ReportingAutomated reportage & guidance tool Get to data fast; macros speed retrieval of the most important results
Interactive reporting allows “problem-issues” to be highlighted
Guidance within the reportage avoids abortive work
VE-Pro example output
SunCast: Solar penetration
ApacheSim: Colour-coded results
VE-Pro capabilityEnergy Modeling
Passive design / natural ventilation / mixed mode
Detailed HVAC control / LZCT / Energy Performance Certification
ApacheSim: Natural ventilation visualisation
Overheating analysis: CIBSE Guide A; HTM 03-01; BB 101Energy/Carbon usage: simple COP / detailed HVACNatural ventilation design & feasibilityRenewables (LZCT) assessment
VE-Pro example output
ApacheHVAC: Detailed HVAC simulation
VE-Ware / VE-Pro: EPC
VE-Pro capabilityEnergy Modeling
Passive design / natural ventilation / mixed mode
Detailed HVAC control / LZCT / Energy Performance Certification