cactus self-shadowing
DESCRIPTION
Studio Project in DIATRANSCRIPT
PortfolioOctober 08 - January 09
Architecture needs the inspiration from the nature
Edited by Liu, Ko-cheng
SELF-SHADOWINGSELF-SHADOWING
前言
目錄
CactusResearch
01
OGIC in the NATUREL01 仙人掌
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03
OGIC in the NATUREL01
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Area in sun project
Area in shadow
The creatures in the nature always follow their own principlesand grow up with these specific evolutions. It also takes placein the cactus. The cactus has the advantages that it has the ribs extruding from its surface. According to the report, the main reason is to keep the surface in a lower temperature because these ribs can help generate the shadows depending on the sun location. So that the water can efficiently be contained inside the cactus from the evaporation. Moreover, when the cactus grows up, the ribs become twisted gradually. This is also because the twisted ribs can generate more percentages of shadows than the normal ones. Therefore, in this project, the logic of how the ribs of cactus are formed and located would be the main focus. This would be extracted and used as the fundamental idea of the proj-ect.
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OGIC in the NATUREL01E
NN
W
SGrowth direction
The cactus also has the characteristics that it leans to the south-west when it grows up. Because it has greatlyto do with the sun location. In this way, the cactus can gain more shadows by itself, cool down the surface and then keep the water from evaporation as the main purpose so that it can survive in the cruel environment. Therefore, with these intellegent growth of cactus, this motivates me to put the idea into architectural design. The next step is to cultivate how the growth of ribs influence the shadows and transform it into architecture.
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07
TRATEGY in the PROJECTS
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02
08
Sun exposure
Shadow
52° 31’0’’N 13° 25’ 0’’ E
re
Examples (Calculating and Rendering in Maya)
Based on the previous research, this project aims at finding out the most efficient way to generate shadows by building itself. Thus, starting with different typologies is the main operation in the process as well as the input of geometry.
Calculating the percentages of shadows in each model takes one of the most important parts in the project becasue the goal is to dig out the most intellegent one and have the ability to compare each other. Accordingly, the use of the scripting in maya software is the most powerful tool because it greatly helps to define sun and shadow area, and paint the area with predefined color in a graphic way. The most important is that it uses mathematic method to calculate the percentages.
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09
TRATEGY in the PROJECTS
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03
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PERATION in the PROJECTOLift
Floor area: 36,000 m2
Height : 160 mLocation: Dubai
Date: 21th AugustTime: 12:00 pm
Latitude: 25°15'39.72"NLongitude: 55°19'57.53"EDate: 21th AugustTime: 12:00 pm
Longitude: 55°19'57.53"E
Starting with different operations of models is the first step in the process. This is to find out the most successful method and be operated later. Therefore, calculation of shadow percentages and comparison with each other are the most important thing at this stage. What matters most is the set up of the criteria so that each model can be compared at the same level and it helps to clearify the best one. Below is the criteria:
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Option1
Option2
Option3
Option4
Option5
% of shadows
% of shadows
% of shadows
% of shadows
% of shadows
50%
53.4%
63.3%
60.8%
63.8%
49.3% 56.1%
64.5%
66.9%
69.1% 66.3%
71.8%
59.2%
67.8%
57.3%
60.3%
66.4%
66.7%
66.0%
56.4%
59.3%
67.0%
62.8% 67.9% 67.8%
54.3%
60.5%
65.5%
66.1%
65.7%
Average
1 2 3 4 5
OperationGeometry
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PERATION in the PROJECTO1 2 3 4 5 6 7
Strategy1: Twist
1 2 3 4 5 6 7
Strategy2: Position
Apparently, the more twist or ribs the model has, the more shadows it geneates by itself in accordance with the results. However, from the perspective of archi-tecture, it will waste too much space if the operation exceed the limitation. And thus, the calculation will stop at some certain level and be optimized.
In this stage, two strategies are extracted as the main study because these two are the most successful models which can generate shadows by itself mostly accord-ing to the previous result. Thus, the next step will have more detailed changes of model based on these two strategies.
1 2 3 4 5 6 7
1 2 3 4 5 6 7Strategy2: Position
Percentage of shadows
69.1% 70.9% 73.0% 75.9% 76.3% 77.9% 80.1%
2 ribs 3 ribs 4 ribs 5 ribs 6 ribs 7 ribs 8 ribs
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1 2 3 4 5 6 7
1 2 3 4 5 6 7Strategy1: Twist
Percentage of shadows
67.0% 67.9% 68.7% 68.9% 72.3% 73.9% 75.2%
90o
270o
225o
210o
285o
330o
345o
03
Continuing and combining the best two models are the final stage. As a result, this model can gain the most shadows by itself. For the following step, the analysis of the shadows during a day plays an important role in this model because this helps to understand where the shadows locate. Once the sun and shadow area are defined by the changes of time, the functions can start to be put inside the space in an intelligent way. Espe-cially, the office is the main function taking place inside the tower so that each activity needs to be well located, depending on whether the space is occupied by sun or shadows.
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PERATION in the PROJECTO+ ==
160m
36,000 m in totall floor plans2
Operation
WestEastElevation South North
Advantage1 Advantage2
Areas where shodows generate most
9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00
West
East
South
North
Percentage of shadows
68.5%
DubaiDate:21th, August (Hottest day)Time:12:00 pm
Average
61.5% 70.2% 77.4% 83.1% 73.7% 67.2% 62.9% 60.5% 59.6%
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04
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RCHITECTUREA
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04
19
RCHITECTUREAPlan Scale m 1:500
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Section Scalem 1:800
A A’
Shadows
160m
Foot print: 38m
A A’Sun lig
ht Office
Office Office
Cafe
Green Area
Office
96.31
137.87 138.40
90.10
21.54
107.39m2
m2 m2
m2
m2
m2
30F
Green Area
Service Center
OfficeOffice229.16 223.01
75.05
21.54
m2
m2
m2
m2
29F
rr
Green Area
Service Center
Office Office293.78 315.35
86.97m
21.54
m2
m2
m2
2
28F
Area where sun project most
EastWest
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