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Optimizing Structural Concrete Facades for Enhanced Daylight Infiltration

This research explores the development of a structural concrete facade designed to maximize daylight entry while minimizing the use of standardized elements. Drawing inspiration from the natural growth of bone structures, the study employs topology optimization to identify efficient shapes that respond dynamically to applied forces. Using a free 2D optimization tool, calculations were conducted on a model building subjected to specific wind loads. The study utilizes the Diana optimization program to simulate and analyze the facade’s performance, considering various factors like mesh type, division, and iteration frequency.

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Optimizing Structural Concrete Facades for Enhanced Daylight Infiltration

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  1. Research progress Arjan Klem 1211366

  2. Concept &hypothesis • How to create a structural concrete facade that is transparent enough to get a good amount of daylight in and is not made of standardized elements? • The growth of a bone structure is nature’s example of a structure reacting to forces applied to it.

  3. Topology optimization; Optimize a shape to the forces applied to it, using the minimum amount of material. • A free 2d example program was used to experiment a little with this. • www.topopt.dtu.dk

  4. Things I had to do: - Calculate the forces on a standard building - Find a optimization program to calculate the façade of this building The building: 20x20x12 meters Wind load: 1kN/m² Chosen façade thickness: 300mm - This resulted in the input for a program

  5. As the optimization program I use Diana with a optimization script I received from dr. ir. Max Hendriks, who has done some research about optimization in Diana. • Now I had to model the input. Optimization in Diana, Max hendriks, May 2007

  6. Some factors are affecting the results: • Mesh Type (triangular/Quadratic) • Mesh division (finer=accurate but slow) • Number of iterations; Every node can be reduced 7 times so the maximum number of iterations is 7*nodes. Sow a finer mesh causes exponentionally more calculating time.

  7. Results of a triangular 24x24 mesh using 50000 iterations

  8. Now it raises the question if the Diana calculations are correct: I should somehow create a real model and test it and compare the results with the Diana output. -Downside of using Diana: Calculation times become very long to get accurate results

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