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| https://homesthetics.net/yas-viceroy-abu-dhabi-hotel-asymptote-architecture/ |
ARCH
655| PARAMETRIC MODELING IN ARCHITECTURE
PROJECT 1| THE YAS HOTEL, ABU-DHABI
Homa Pesarakli
Instructor: Dr. Wei Yan
Fall 2019, TAMU
Content
1.
Introduction.
2.
Project objective
3.
Project Challenges
4.
Modeling (Mass & Skin)
4.1. Main building
4.2. Bridge between building
4.3. Curved Surface and frame
5.
Physical-Based Modeling
6.Surface
Curvature
7.
Project Video
1.Introduction. I
selected the Yas Hotel,
Abu Dhabi, as my case study of the parametric model for project 1 (midterm) in
Arch 655. Rhino, Grasshopper, and Kangaroo are used to create the parametric
form (mass and skin) for the curved design, make the physically-based model as
an alternative solution, and do some analyses.
2. Objective. The goal is to demonstrate some of the acquired knowledge, tools, and skill set in
the Arch 655 class (Parametric Modeling in Design http://bim-sim.org/ARCH655/index.html)
offered by Professor Wei Yan at the College of Architecture - Texas A&M
University (Fall 2019).
3. Challenges. The challenge was the modeling irregular shape its frames and made the design
changeable. This
project aids me in understanding parametric thinking and modeling and provides
me another effective way to show design concepts.
The process
of the project modeling will be discussed in the sections below; each section
will focus on a specific logic, and a set of tools and operations to achieve a particular
design
goal. The goal of this study was creating the approximation form of the original design.
I primary used Rhino 3D (digital
environment) and Grasshopper (plug-in) for modeling this project. I also used
some other plug-ins, including Kangaroo, Weaverbirds, and Lunchbox (Diamond
panel). Each of them is concerned with performing a specific design and
analysis task that Rhino and GH alone could not achieve.
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| Fig.2: Shows the base curves used for the hotels' floor layout |
4. Mass & skin Modeling.
The modeling process was started by drawing basic curves of two elliptical buildings on Rhino. Then, I used Grasshopper for the rest of the steps in the modeling process. The objective was to develop and maintain a transformable model that could respond to any changes or development during or after the design process.
4.1. Main building. The base curves developed in Rhino were referenced in Grasshopper to model the main building masses. As shown in the image below, each curve is used to create a boundary to extrude and create floors. Then I used them to model walls. For the first floor, I used a single number for extrusion, while for upper levels, I used "series" to extrude several stories at the same time. I also moved the curve of the highest floor to the proper elevation using the List Item and then extrude it. The approach here is to have the flexibility to change, modify, or even remove an entire floor f without affecting the rest of the design.
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Fig.3:
Shows the GH definition to model the hotel's main building masses.
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The bridge between buildings. Then, I modeled the bridge between two ellipses by drawing two curves in Rhino and projecting them on ellipses. Then I lofted those curves to create the bridge.
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| Figure 4. Modeling the Bridge between two buildings |
Skin Modeling. Following
is creating the surface, the modeling process here follows the same logic; the
curves That were created in rhino was loaded to the grasshopper and then lofted to
create the surface.
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| Figure 5: Basic curves for skin |
4.3. Curved Surface and frame. In the next step, I created the
structural frame of the skin using three methods. In the first method, the skin
was subdivided to 8 points in U direction and 29 points in V direction. Then,
these points on the surface were connected to create primary curves of the
frame in two directions. The challenge was that both curves are irregular, and
their points did not match exactly.
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| Figure 6: Skin frame, first option |
In the second method, I used the Diamond panel to create diagonal frames
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Figure 7 "Lunchbox"
package for grasshopper was installed to create diamond-based panels on the
facade.
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In the third method, I used the divided
domain to divide the surface into two domains and then use the Isotrim to
create curves for the structural frame.
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| Figure 8: skin frame third option |
5. Physical-Based Modeling. In the next phase of this project, we were asked to assess the effect of physic engines on this model. I Used Kangaroo and WeaverBird to create a parametric, physically-based model for this building.
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| Figure 9. Result of using the Kangaroo |
6.Surface Curvature. In the final phase of this project, I used color mapping to analyze the geometry of the skin different colors show the different behavior of the skin in various regions of skin.
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Figure 10. Assessing the geometry of skin using color-mapping.
Figure 11. Zebra Operation
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I also used the "Zebra" operation in Rhino to analyze the surface. The curvature in Grasshopper explained the degree of concave and convex areas on the surface, as for this operation. Using this method, we understand the surface smoothness level.
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| Figure 13. Zebra Operation on the skin after applying the Kangaroo |
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| Figure 14. Zebra Operation on the skin after applying the Kangaroo |
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| Figure13. The image of the building in Rhino |
7- PROJECT VIDEO
https://youtu.be/g1Ydok_SIvU
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