TU Delft _ Faculty of Architecture _ AR0025 _ XXL Workshop (2010-2011 Q3) Team 5: Bristogianni Telesilla _ Calle Eduardo _ Sakkas Panos _ Shitole Harshad
The New Kuip: Enfolding 24/7
After getting the results we realised that the ring which is supposed to work compression ring was not in entirely compression and the whole system was generating opposite axial forces and reactions in adjacent members. After investigating the problem we concluded that the problem lies in the connection between the angular column and the ring beam as the angular columns were preventing ring to compress so at some places ring was in tension resulting opposite axial forces. Solution for this problem was found in the Olympic Saddle dome in Calgary which was built on the simmiler principles. Two of the opposite column beam connection on the lowest side were pinned so that commection movement in X,Y and Z direction is restrained and all other connections were roller connections where the Z movement was restrained but X and Y movement was permitted resulting in compression behaviour of the ring. To achive this behaviour master and slave joint system was adapted for the connections adding extra nodes at respective junctions. After making necessary nodal restrain changes in model we again did non linear static analysis for system check only applying gravity load and prestressing. The ring was in complete compression and cables in pure tension but were showing snapping phenomenon. Even after increasing the prestressing the results were similar. So we concluded that the roof curvature is not enough, it need to be more curved. The sag for the cables in both directions was changed from 10m to 15m (6% of the span). After these changes further analysis was carried out.
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Structural Design