DOUBLE CURVATURE BRIDGE
The Idea
“DOUBLE CURVATURE SHELL BRIDGE”
To design a bridge by generating stress lines on a mesh and bracing it with additional support for better stability and structural integrity.
Process
Base curves are lofted to create a surface. The surface is deformed on Karamba and the stress lines are generated. Important stress lines are extracted for further design.
Design Exploration
Extracted stress lines are used as a design guideline to evolve a form that is structural yet, aesthetically pleasing.
Form is evolved by creating a surface from the offsetted stress lines to form a shell structure that is light and strong.
Fabrication
We made the fabrication by 3D printing layer by layer in two stages, the firts one for the shell structure and the second one for the stress lines, do this allowed us to have a stronger structure.
Simulation
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Analysis
Several prototypes were printed in order to determine the layer length, to observe the strength of the material, geometry and to detect the errors in the script.
- printing speed determined + layer thickness determined + inadequate raft support
- layer thickness determined + display geometry changes
- script errors detected
- scale matters
Prototype Technicals
Prototype 01
- Height: 600 mm
- Width: 327 mm
- Depth: 140 mm
- Printing Time: eternity
Inferences:
- – The model out of reach
- – Printing time too long
Prototype 02
- Height: 300 mm
- Width: 114 mm
- Depth: 78 mm
- Printing Time: 4 hr
Inferences:
- – Slope at section cc was too steep for the contour size. Hence, there was some irregularities in the print in that Region.
- – Section AA representing a broader base provided adequate contact with the rafts to hold the model in place during the fabrication.
Prototype 03
- Height: 500 mm
- Width: 271 mm
- Depth: 65 mm
- Printing Time: 3:50 hr
Prototype
The Bridge
Students: Andrea Lizette Nájera Rodríguez, Huanyu Li, ?pek Attaro?lu, Shamant Thenkan
IAAC faculty: Eduardo Chamorro Martin, Marielena Papandreou