Presentation to NH Arch - Parametric Modelling and Evolutionary Analysis
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Parametric Modelling and Evolutionary Analysis Nathan Luke Mark Sheldon
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Transcript of Presentation to NH Arch - Parametric Modelling and Evolutionary Analysis
Parametric
Modelling and
Evolutionary
Analysis
Nathan Luke
Mark Sheldon
2
The Journey
3
Advances in design/drafting
Paper
CAD
3D Modelling
The Evolutionary Leap!
Advances in engineering
Hand computations
2D Computer analysis
3D Computer Analysis
Generally
exclusive
2 to 3
Iterations
Rapid evolutionary analysis and Parametric Modelling
4
Example of Parametric Modelling
Parameters
Parametric Model Geometry
He
igh
t (1
)Diameter (5)
No
. o
f L
eve
ls (
2)
Rotation (3)
Verticals (4)
5
Parametric Modelling and The Design Team
Architectural
GeometryAnalysis
Parameters
1
2
3
Structural
Analysis
Parameters
Structural
ESD
Other
Structural
Geometry
Add Structural
Geometry
Parameters
Co-ordination
Materials
Beam Sizes
Truss Depths
Beam Layouts
6
+
+
The Tools
• Integration with an array of structural
analysis programs through Geometry
Gym add-ons
• Large community support and backing
• Structural analysis available within
grasshopper (through) add-ons
• Low cost
• Directly links to Revit and Robot
structural analysis
• Potential for full BIM parametric
modelling
7
The Tools
• Uses data keys to transfer
between different interfaces
• Create separate projects
• Modify geometric data from
the internet browser
• Set permissions
• Send specific or all data
keys to other parties
External Design Team
8
What is evolutionary analysis?
Geometry Analysis
Parameters
1
2
3
Evolutionary solvers
Galapagos / Octopus
fitness outputs A, B, C to
optimise
A
B
C
Ability to automatically change
parameters to find best solution
Choose one or more
inputs to optimise
Choose which parameters to
change
Structural
Design
ESD etc
9
Evolutionary Design Optimisation - Example
10
Evolutionary Optimisation
Form Finding
Video above shows real-time form finding of the plan shape
using Rhino Vault.
11
Case Study – IFC Snow Flake
• Christmas decoration situated in the IFC Mall, Hong Kong
• Temporary structure
• Steel podium structure to create upper podium and support for dome
• Self supporting dome made only of Lexan sheet - No Support Structure
Lexan SheetFinished Product
12
Case Study – IFC Snow Flake
Initial form-finding
Architects Rhino Model Model in Analysis Program – With
uniform loading
Easily extract
surface outer lines
and import into
Modelling
Program
13
Case Study – IFC Snow Flake
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Case Study - IFC Snow Flake
Geometry
Inputs – From
Rhino
Plate Material
Inputs
Beam Material
Inputs
Assigning
plate propertyOutput mesh
Beam Material
Inputs
Output Beam
Elements
Grasshopper Interface
Using Geometry Gym Plug-in
STRAND7
Align beam to
connecting
plates
15
Case Study - IFC Snow Flake
Strand 7 Model – Exported from
Rhino/Grassshopper
FEA Model – Close Up
Beam
Elements
Panel
Elements
16
Case Study - Devonport
Design CompetitionPreliminary
DesignFinal
Documentation
17
Case Study - Devonport
• Roof structure
modelled in Rhino
using Grasshopper
from architect
surface model.
• Roof structure
exported to Revit for
documentation.
Design CompetitionPreliminary
DesignFinal
Documentation
Benefit
• Structure was easily
adjusted as architect
made alterations to
surface model.
Outcome
• A coordinated roof
structure model for
presentations by the
architect.
• Roof structure
exported to
SpaceGass for
design.
Benefit
• Quick process
considering complex
geometry.
Outcome
• A coordinated
presentation model
and structural model.
Benefit
• Quick process with
certainty that
structure is modelled
in correct location.
Outcome
• A coordinated
structural model and
Revit model.
18
Case Study – Simonds Stadium
Preliminary Form
19
Case Study – Simonds Stadium
20
Simonds Stadium – Detailed Design
• Accuracy of member
placement
• Python Scripting to apply
rotation of members based on
each individual plane
21
Simonds Stadium – Detailed Design
Documentation
Modelling
22
(Some) Advantages of Parametric Design
Closer Integration and co-
ordination between
Architecture and StructureAligning the use of similar
programs (Rhino and Revit)
Increased optioneering
Geometry rationalisation for
fabrication and installation
Form Finding
Fast and efficient solution
finding
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Any questions, Lets Discuss….
Nathan Luke
Structural Engineer
Buildings Group
Mark Sheldon
Technical Director
Buildings Group
Peter Murenu
Technical Director
Buildings Group
