Posts Tagged ‘lichen’

elastic skin

As introduced in the last post the aim of this facade proposal consists in the integration of the tower in the urban context on two levels. Interacting with its surrounding context it brings together places which are today separated by busy roads or visual factors. And changing its form on the top it links to important places whithin a bigger urban context.
The so called attractors transform the existing outline of the tower to achieve the integration of the tower in the city of Piraeus and Athens.
As an exampel you can see in the next image how the skin could link the existing market with the tower’s ground floor to allow more fluidity on this level and bringing together shops on the street with the ones in the building.



As you see in the drawings, the skin doesn’t follow the tower’s outline almost at all. This doesn’t only allow the interaction introduced before, but it also connects the two volumes of the tower and lets them appear as one unity.
The structure, as it is shown now, doesn’t represent the final intention, it is just an approximation of what I’m trying to achieve. Taking the principle of reinforcement from the precedent exercise I tried first to take a main structure (actually the one in the drawings and image above) and then reinforce it where the structure demands it. But while working on our case study, which analyses the growth of lichen, I came up with the idea of combining main structure and reinforcement and taking density as factor for the structure. As I already mentionned I haven’t suceeded yet to build this but in the following images I give an idea of what I’m willing to do. A curfature analysis of the transformed skin should show where more structure is needed and create it with more density at that points. An image of the curvature could be used as image sampler which densifies the structure where a certain colour is shown. Doing so, I could have a more uniform structure which would help the appearance of the tower in its context.

Finally the space between the structural elements can be treated differently. The space can be left open, closed by glasing or even with opaque materials. A possible solution for this could be the following detail, where covering elements are squeezed between metal tubes which go around the structural beams.

DLA: pattern becomes structure

I modified the 3D DLA VB component in order to get a list of lines between each new point and it’s neighbour. The starting poins lies on the xy-plane. Every new point is positionned one level higher in z-direction than his neighbouring point, once it has found one. That means every branch is growing upwards.

Animation of the growth

GH definition
VB component

Lichen

Presentation slides

While analysing the lichen’s morphology we found the process of Diffusion-limited aggregation (DLA) defined by Leonard M. Sander and Thomas Witten in the year 1981. This algorhythm creates a specific pattern of particles. It starts with a single particle, whose position has to be defined. Each new particle is moving randomly within a given field and joins the already existing particles if it gets close enough.

DLA-simulation from The Computational Science Education Reference Desk (CSERD)

Our translaiten into parametric design

flowchart for the following script

In the two following GIFF-animations you can see the same amount of particles in two different areas. If they are growing in an area of 50×50 the result is much denser than in the one of 100×100.

klick to see the growth of the simulation in a field of 50x50 with 300 paricles

klick to see the growth of the simulation in a field of 100x100 with 300 paricles

klick to see the growth of the simulation in 3D

2D GH definition
VB-component script_2D

3D GH definition
VB-component script_3D