Interrelation of Geometry, Daylighting andStructure in Perforated Screen Walls
Niloufar EMAMI, Peter VON BUELOW
University of Michigan2000 Bonisteel Blv, Ann Arbor, MI
Outline• 1- Introduction
• 2- Persian Patterns
• 3- Shading Screens
• 4- Configuration processing
• 5- Daylighting performance
• 6- Structural performance
• 7- ParaGen
1- Introduction
Architecture
Daylightingperformance
Structuralperformance
Quantitative Assessment Qualitative Assessment
Visual aspects
Design Aesthetics
•Objective of this study
•Goal of this research
•Methods
2- Persian Patterns
Jamé Mosque of Yazd Jamé Mosque of Isfahan, Ostad Ivan
Family of geometric patterns
Family of geometric patterns Grids as the invisible structure of patterns
3- Shading screens
The shading screens, “Shobāk”, in Jame Moque ofIsfahan
Shanāsheel, TaheriHouse, Bushehr, Iran
Shanāsheel ,Deyri House, Bushehr,Iran
A house in Basreh, Iraq
Case study: Masdar City
Case Study: Al Bahr Towers
4- Configuration Processing
Configuration Processing
Geometric parameters
Parameter Symbol Constant/variable
Acceptable interval
Width of the screen W Constant 500 cm
Height of the screen H Constant 500 cm
Depth of the screen D Variable [5-35 centimeter] step5cm
Hexagonal grid radius Grid Constant 35
Diamond diagonal dimensions Diamond Constant 35 * 61
Division Distance (the distance fromattraction point is divided by thisvalue)
Div. Dist. Variable [1-110] step 1
Radius of the wall’s curvature R Constant 4819 cm
Center location of the subtractedcurve
Center Variable in y axisVariable in z axis
[0- 36] step 1[0- 500] step 1
Architectural Applications
Phase 1 of study: Design of Experiments
5- Daylighting Performance
Location Date Time Materials Sky-types Settingparameters
Phoenix,AZ
September21st 2014(used for point intime visualization)
solar noon(12:21 pm)
Generic Floor (20)Generic interior walls (50)High reflectance ceiling (90)Outside ground (20)Glazing single pane (88)Outside Facade (35)
Clear sky withsun
ab 2,ad 1000,as 20, ar 300
Diva for RhinoSettings
Section of the office space
Daylighting Results
Daylighting Results
6- Structural Performance
Structural Results
7- Phase 2 of study: ParaGen
A selection of randomly generated solutions used to initiate the search
PARAGENForm Generation
Evaluation
SQL storage and website
Geometry (3dm)
Writes the datafromgrasshopper toexcel file
Generates valuesSystematically, randomly, or bybreeding
New parameters for geometry
Reads the data from excel andcontrols parameters ingrasshopper
Performance valuesUploaddata
Parallel point diagram of the parameters andthe performance values
A display of solutions taken from SQL database
Available performance values of each case
Mean Daylight Autonomy versus perforation ratio
Mean Daylight Autonomy versus Weight
Conclusion• The study contributes to the design of screen walls, in order to control
daylighting and to provide shading for the buildings.• multi-objective performance evaluation of a screen wall, inspired by
Persian geometric patterns.• The perforation ratio of each module can differ to accommodate the
unique daylighting needs of a specific space.• The depth and curvature of the wall can vary depending on the
required structural behavior, which ultimately affects the weight of thewall
• The modules of the screen wall can be stacked on top of each other toshield a multi-story building, which expands the boundaries of itsapplication.
• Designers can bring variety to the design of screen walls, not only withvarying geometrical perforations, but also with altering the curvature
Thanks for your attention!