Resilient Walls
Lightweight & Load-Optimized Modular Brick Systems
In regions most vulnerable to climate change — particularly Small Island Developing States — the need for rapidly deployable, adaptable infrastructure is urgent. More than 60% of the population in Guyana, Tuvalu, and the Bahamas (approximately 10 million people) are exposed to 100-year flood hazards. (Archer et al.)
Traditional solutions like gabion walls are heavy, material-intensive, and difficult to transport and assemble quickly.
How might we create flood defense structures that are lightweight enough for rapid deployment, strong enough to withstand extreme conditions, and modular for adaptability and reuse?
Biological Inspiration
Bird Bones → Lightweight Strength
High internal porosity maintains strength while minimizing weight. This natural optimization informed my topology optimization approach for efficient material distribution. (Sullivan et al.)
Conch Shells → Fracture Resistance
Three-tiered lamellar structure deflects and dissipates cracks. This principle inspired my grain direction strategy for crack prevention. (Osuna-Mascaró et al.)
Process: Design
Topology Optimization
Using Grasshopper's Millipede plugin, I defined variable loading conditions, generated stress line maps, and identified three density zones for brick types. The gradient output revealed natural stress lines critical to my design.
Grain Direction Strategy
I aligned internal grain patterns with stress lines from topology optimization and alternated grain patterns in adjacent bricks to deflect crack forces. This created a natural assembly logic based on stress orientation.
Modular System Design
I standardized brick dimensions at 1:20 scale with a uniform height of 15mm (30cm full-scale) and three lengths: 30mm, 45mm, and 65mm. I achieved three density types through shell thickness variation.
3D-Printing
Through iterative testing, I developed a fabrication process that supports grain direction. I reduced infill to 0% and achieved material differentiation through shell thickness variation only. I spatially oriented each brick during printing to align with the intended grain direction, resulting in clear PLA prototypes at 1:20 scale with clean grain expression.
Assembly System
The gradient map from Millipede acts as assembly instructions. I placed each brick based on stress line orientation in the layer below, with grain direction alternating to prevent crack propagation. The modular sizing allows for adaptive reuse and reconfiguration.
Final Prototypes
The backlit models show the varying infill densities inspired by the bird bone density optimization properties and the grain directions from spatial orientation during 3D printing inspired by the conch shell fracture deflection properties.
Future Development
Material Innovation
I'm exploring bio-based filaments (wood-based, biocomposite) to reduce microplastic spread in water sources and enable end-of-life compostability. (Gehr) (Eastside Projects)
Advanced Joinery
Inspired by prismatic shell structures, I envision micro-textured friction-based connections that enhance load-bearing capacity without compromising assembly ease. (Ballarini et al.)
Low-Tech Alternatives
For regions without 3D printing access, I'm investigating rammed earth fabrication that maintains grain direction principles while enabling community-based construction methods.
Structural Validation
Future work includes horizontal and lateral force testing for flood conditions, site-specific loading simulations, and validation across real-world environmental scenarios.
Scaling Challenges
Moving from prototype (1:20 scale) to full-scale bricks (15 x 15 x 30 cm) requires further research into advanced manufacturing processes to maintain detail resolution and fabrication speed.