March 2009 Archives
The cladding is deliberately kept off some areas so that the build up of frames can be seen. This model has smaller pre cast panel sizes 1.5m x 3m. However, at the area where they become too small to be individual panels, large scale panels with a pattern grooved into the surface will be placed there instead.
I havent resolved how to make the spanning strut inhabitable but it means moving the control points that support it at its back. I am drawing up these problems and strategies now.
I havent resolved how to make the spanning strut inhabitable but it means moving the control points that support it at its back. I am drawing up these problems and strategies now.
The primary frame is supporting the overall form:
The corners and the vertical struts between the corners are the weakest parts. The planes are rotating around these struts. The horizontal beams at the top edge act as ties for these struts. Although the strut creats a path for the load to be carried directly to the ground, the trusses within the planes also carry some of the load of the struts across the surface of the plane. The most important force seems to be the lateral force that the floor plates need to be active in. They tie back the tipping planes.
The secondary frame supports the cladding panels only. This frame is structurally supported by the primary frame. It is susceptible to shearing if it is supported only at its corners as it bends out of its plane. This plane needs to keep flat.
There needs to be a specially made panel for the corner situations to create continuity across the surfaces. I think that the panels could act to support the strut at these corners and help to hold back the rotation of the planes around this line. I need to diagram and notate this more but its a start. These models are at 1:100 scale.
The corners and the vertical struts between the corners are the weakest parts. The planes are rotating around these struts. The horizontal beams at the top edge act as ties for these struts. Although the strut creats a path for the load to be carried directly to the ground, the trusses within the planes also carry some of the load of the struts across the surface of the plane. The most important force seems to be the lateral force that the floor plates need to be active in. They tie back the tipping planes.
The secondary frame supports the cladding panels only. This frame is structurally supported by the primary frame. It is susceptible to shearing if it is supported only at its corners as it bends out of its plane. This plane needs to keep flat.
There needs to be a specially made panel for the corner situations to create continuity across the surfaces. I think that the panels could act to support the strut at these corners and help to hold back the rotation of the planes around this line. I need to diagram and notate this more but its a start. These models are at 1:100 scale.
working out pattern for panels and whether 2 frames are necessary : 1 for structure, 2 for pre cast panels. Am off to see john..
next...onto material construction..
comparison of thickness of walls in relation to weight and load they are carrying as well as the scale of the construction.
Thickness of wall also depends on method:
Pantheon:6m thick pure light weight concrete concrete
Concrete Silo: 400mm thick concrete units with tensioned steel hoops
The Chapel: 200mm thick in situ concrete walls
EUR proposal: 700mm thick reinforced concrete plates
Phaeno Centre: combination of both in situ casted concrete and precast concrete panels on steel frame work. Thickness of floor slab is reduced due to use of polysterene coffers. Overall volume of concrete is relatively small for a building of such size.
I'll post some test model photos later tonight.
Thickness of wall also depends on method:
Pantheon:6m thick pure light weight concrete concrete
Concrete Silo: 400mm thick concrete units with tensioned steel hoops
The Chapel: 200mm thick in situ concrete walls
EUR proposal: 700mm thick reinforced concrete plates
Phaeno Centre: combination of both in situ casted concrete and precast concrete panels on steel frame work. Thickness of floor slab is reduced due to use of polysterene coffers. Overall volume of concrete is relatively small for a building of such size.
I'll post some test model photos later tonight.
after TS meeting today and discussing the usage of insitu concrete, it was said that load would be carried by the steel reinforcement or structure anyway. Concrete is mainly used for compression and the planes are in tension. The situation is that a structural frame is needed yet how structural could its facade panel be? frame vs plane.
Plane needs to look visually continuous.
Plane needs to look visually continuous.
