parametric analysis and design engine for tall building...
TRANSCRIPT
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Parametric Analysis and Design Engine for Tall Building Structures
Goman HO, Arup Fellow
Structural Engineering: Backbone of Built Environment,
31 May 2018, Siam Kempinski Hotel
2 Mahanakhon (304m)
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From 2D to 2D CAD
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From 2D to 3D
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Architectural Vs BIM Vs Structural Models
(With courtesy of Studio PeiZhu)
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From 2D to 3D and BIM
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2010 Winner – Bentley Delivery Process Innovation Using BIM
Marina Bay Sands (2007)
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Hong Kong Airport Midfield Development (2011)
2012 Winner – Bentley BIM Innovation in Airports
2013 Winner – Autodesk Hong Kong BIM Award
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From 3D to 4D or xD
Hong Kong Sludge Treatment Facility
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11 Buildings completed with computers
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Synchronised drawings – Structure
Taipei Pop Music Centre (2012)
• Building setting-out
• Streamlined shop drawings production
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Parametric Modelling
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Parametric Technology in Metal Stamping
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Parametric Models
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Geometry object defined by parameters and component
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Building Objects
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Structural Element Objects
• Mega column
• Mega Braces
• Transfer Trusses
• Core
• Beams
• Slabs
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Bracing pattern can be changed by just updating some of the key parameters
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Study Options for Bracing and Belt Trusses
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Extracting of the story framing plan by scripts
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Parametric Modeling and
Computer Design Optimization (CDO)
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Parametric modeling to generate different structure systems
Column space as
design variable
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Virtual work analysis results for different schemes
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Ensure Consistency & Quality @ Rapid Design Changes
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Results comparison and evaluation
0%
50%
100%
150%
200%
250%
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cost
client's Satisfaction
Satisfaction/cost ratio
Member sections are controlled by lower boundary, such as strength, buckling.
Not feasible for concrete frame under limited beam depth. Large steel ratio required for SRC frame so cost increase sharply.
Best choice to balance the client’s preference and structure cost.
Client can make the decision if the cost is acceptable to them.
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Typical Floor Layout
Zone 1
Zone 2
Zone 3
Zone 4
Zone 5
Zone 6
Zone 7
Zone 0
Observation Zone
Mega-Column
Mega-Brace
Belt Truss
(7 in total)
Office
Zone 1 to 7
Observation Zone
Zone 0
Lobby
Corner Truss
Bottom Brace
Zone 0
Belt Truss
Top Truss
Reinforced
Concrete Core
Crown
Structural System- China Zun (528m)
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Varied Functions
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• Examples of architect massing variations
Parametric Model Overview
Architectural/External Input
Top dimension
variationWaist size
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• Examples of architect massing variations
Parametric Model Overview
Architectural/External Input
Corner radius variation
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^ Tower waist change
^ Tower radius &
Slab meshing change
^ Façade clearance change
Beijing Z15 中国尊 (528m tall, 108 storeys, 7 storeys basement)
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The Column-line: Orientation
Angle
Larger Angle
beneficial:
- Larger stiffness
adverse:
- Larger façade-structure distance
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Value Engineering Floor-by-floor Measure
Minimise “unfavourable” area
up to 8,700m2
= 2 additional stories
= 1 billion HK$
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• 854 Options Evaluated
Time Saving
Design Changes…Traditional
Parametric
Time
First Model
Design Changes…First Model
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Seismic Design –
Linear Models for Wind and Seismic,
Push-over, Nonlinear Time History Analysis
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Analysis and Design Engine (ADE)
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• General layout drawings for plan and elevation;
• Linear model for code base design with graphical analysis results for
visualization and presentation;
• Nonlinear keyword file for LS-Dyna analysis to ensure the structures will not
collapse in severe earthquake (i.e. performance check);
• Connection geometry in IGES for Finite Element Processing including Pre-
processing in generating meshing, analysis and post-processing.
• 3D connection shop drawings in X-Steel format for fabrication.
• Detailed section definition.
• More modules could be added….
Analysis and Design Engine (ADE)
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Frameworks for Analysis and Design Engine (ADE)
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Finite Element Model generated by ADE
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FE analysis results after optimization
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3D image and construction drawings generated by ADE
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Detailed composite section definition by ADE
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Erection of the Mega Column
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Mega Column (11.5m x 5.2m) of 597m tall TJ 117
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TJ117
597m
Successful Examples
China Zun
528m
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• Arup DTX Fund 5977 - The design and construction guidelines for
connections of composite structures.
Acknowledgement
