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Showing posts with label detail. Show all posts
Showing posts with label detail. Show all posts
Friday, February 4, 2011
Progress Report 6
Working out the final details of the connections for the railings and the over-all cross bracing and stabilizing system for the suspended bridge which will now appear lighter and actually hang from the large concentric rings instead of sitting on them. This will better lend to the impression, now correct, that the entire bridge is suspended via the tension in the cables and the connections rather then just creating the impression/illusion that is the case.
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Wednesday, February 2, 2011
A MITCH (ha) needed update
Last time, on Mitch, we saw various plants which I intended on 'biomimicking,' including Mangroves, Banyan trees, Whitebark Pine, and my personal favourite, creeper tendrils.
As I explored my options more, I increasingly seemed to be turning to the creeper tendrils, which seem like a great opportunity to emulate for my bridge. The twisting of the tendrils allow for a much greater rigidity than the minimal form of them would suggest.
As I moved forward with this design, it began to develop as a bridge which literally twisted in the same manner as the tendril, but as a bunch of them.
The central sketch in this image shows the thinking behind this. It would be a series of rings, with steel rod supports between to provide the overall structure. These supports would be connected with details like the ones shown below.
I had even begun to develop a script that would allow the bridge to adapt to different conditions, which may be an unnecessary use of grasshopper.
Upon further though, I felt that the number of tendrils was beginning to take away from the concept, and it was beginning to look unlike a creeper at all. I took a step back and began to think about how the plant actually supported itself, leading me to two solutions, twisting, and the cross section of the tendril itself.
This, however, was abandoned. Going back to twisting, I began to look at tensegrity structures as suggested in a critique.
Like this, but on its side. I like that tensegrity structures allow for a great deal of strength with relatively little structure, much in the manner of the creeper tendril. So, this idea is being developed, as can be previewed in the following details.
As I explored my options more, I increasingly seemed to be turning to the creeper tendrils, which seem like a great opportunity to emulate for my bridge. The twisting of the tendrils allow for a much greater rigidity than the minimal form of them would suggest.
As I moved forward with this design, it began to develop as a bridge which literally twisted in the same manner as the tendril, but as a bunch of them.
The central sketch in this image shows the thinking behind this. It would be a series of rings, with steel rod supports between to provide the overall structure. These supports would be connected with details like the ones shown below.
I had even begun to develop a script that would allow the bridge to adapt to different conditions, which may be an unnecessary use of grasshopper.
Upon further though, I felt that the number of tendrils was beginning to take away from the concept, and it was beginning to look unlike a creeper at all. I took a step back and began to think about how the plant actually supported itself, leading me to two solutions, twisting, and the cross section of the tendril itself.
This, however, was abandoned. Going back to twisting, I began to look at tensegrity structures as suggested in a critique.
Like this, but on its side. I like that tensegrity structures allow for a great deal of strength with relatively little structure, much in the manner of the creeper tendril. So, this idea is being developed, as can be previewed in the following details.
Monday, January 31, 2011
Progress Report 5
Image 1 - The large rings that form the spine of the bridge and the anchor rings that will guide the path of the steel cables.
Image 2 - Since the steel cables are twisting, both the large rings and anchor rings will require a high level of flexibility as to their rotation. Once the final rotation is set, the components can be bolted and welded in place with minimal welding.
Image 3 - One of the anchor ring components in an exploded detail.
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Image 2 - Since the steel cables are twisting, both the large rings and anchor rings will require a high level of flexibility as to their rotation. Once the final rotation is set, the components can be bolted and welded in place with minimal welding.
Image 3 - One of the anchor ring components in an exploded detail.
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Saturday, January 29, 2011
General Detailing - Bridge Continued
Bridge - Range of Motion and Ballast Placement. I was trying to determine the optimal range which would allow for the ballast to have the most effect.
Pin Connection. This is for the main arms of the bridges (there are four). The connection would allow them to rotate. Now that I think about it I may need to design a stop so the bridge doesnt fold up completely.
Cast Steel Shear Connection/Walkway. This connection allows for the walkway to fold up flush with itself which would not have been possible if the metal grate was placed on top of the connections.
Ballast Wheels - This is the device which would attach the ballasts to the arms and allow them to move as the water level rises and falls.
Ballast Structure. Preliminary attempts at designing the structure for the ballast and trying to reduce the overall weight by leaving only the load bearing portions of the members. I also was figuring out how the ballasts would be clad and where the seams would be.Tuesday, January 25, 2011
Progress Report 3
Starting to work out some of the details for the central spine of the design.
The detail seen in image 1 is more rigid and as such, is less likely to twist due to moment. The detail in image 2 however is likely to be closer to the final design. This is due to the fact that the twisting of the steel cables will produce angles that will have to be dealt with by moving the anchor* rings in multiple directions.
* - I name these "anchor" rings since they anchor the spine to the steel cables. The resultant bridge is self supporting by virtue of the bunching and twisting of the cables, just as muscle tissue and plant cells are.
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The detail seen in image 1 is more rigid and as such, is less likely to twist due to moment. The detail in image 2 however is likely to be closer to the final design. This is due to the fact that the twisting of the steel cables will produce angles that will have to be dealt with by moving the anchor* rings in multiple directions.
* - I name these "anchor" rings since they anchor the spine to the steel cables. The resultant bridge is self supporting by virtue of the bunching and twisting of the cables, just as muscle tissue and plant cells are.
Image 1
Image 2
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