I need to grab some zzz's but wanted to get these images up for everyone to comment on. I will post the narrative today. Please let me know if you see any issues with the structural systems and/or drawings I've created for this research.
Thursday, February 14, 2008
STRUCTURAL ANALYSIS
The curved shape of my building creates a unique challenge to identify structure and bracing. Based on information from the Architect’s Studio Companion, which are listed on my pages, I’ve determined what I believe to be a successful structural solution. Using a two-way flat slab I am able to achieve the spans and heights needed to accommodate my design. Sizing these elements calls for 22” columns and between a 9”-10” slab. Currently I am showing a 12” slab but will wait further review from Kurt. I’ve achieved shear stability by utilizing the solid wall on the North side of my building and both the stair tower and elevator tower. As seen in my section diagram, the major components are the trusses above the studio space, the floor to floor construction, and the pile and pile cap foundations. Sizing and depth for the piles will need further review from the survey. I plan on using concrete piles and concrete pile cap. Located between the studio columns are shear cross braces giving rigidity to the overall height of this structure. Also with this design I will reference any changes Kurt might suggest. On the second page I am displaying some of the benefits of having a 3D model with structure integrated by showing these in an axonometric. I will most likely add notes to this view based on further analysis and comments.
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3 comments:
Matt,
take some well deserved rest. I'm not a structural engineer (I hope you sent the information to Kurt Benecdict), but I think you don;t heed as many sheer wall in the longitudinal direction, especially the south wall of the residendes seems to be overkill. Having a clear span in the residential wing of up to 34' would need to be carefully tested in th ereal world. You are eliminating piles, as you are reducing the amount of columns. On the other hand you are asking for 12" concrete slabs (?). Typically I would try to limit the thickness to 7-8" in a residential application. This would give me descent acoustical properties without adding a lot of weight (8" instead of 12" is a 33% saving!).
The drawings by-the-way ar pretty convincing. Hard to beat revit... at least if you know how to use it.
Werner,
Thanks for the comments! I can probably go thinner with the posttension slab. I believe the chart will most likely allow a 9" slab thickness. That and I spent all that money in the Exhibit Hall sprinklers, I need to save elsewhere! :-)
Werner,
I got my response back from Kurt and he agrees. Not so many shear walls. He also noted I don't need the cross bracing along my curtain walls in the studio due to the towers and shear walls in the exhibit hall. I will revise for my final drawing set.
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