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Turkish beamless raft is basically the problem; I'm solving a 9-floor project, the ground value is z3 and the ground safety is df=110cm, the ground=19.85t/m2. The foundation is like 23m by 31m. Here the reinforcement is throwing like fi 18/11. This is a bit too much for me, by the way, my carriers The curtain is doing this because of the moment. And I am not able to enlarge the foundation in two directions.
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help with beamless raft
- Thread starter abaci09
- Start date
Hello there; I guess you're still using V5... so I recommend you switch to V6 first and use V6's advanced analysis options and innovations. When I look at your project; - Although you do not have rigid perimeter curtains in your basement, the rigid basement floor number is entered as -1 and this value should be -2. - For a 9-storey building, approximately (9*10)=90cm raft thickness will be sufficient under normal conditions, it is already sufficient for your project. - If the soil safety stress value is 19.85 tf / m², a bearing coefficient value of 8000 tf / m³ seems a bit of an exaggeration to me and a large part of your problem stems from this. With a general approach, it would be quite logical for your soil bearing coefficient to be 2400, I recommend you to talk to your geotechnician. - You will achieve much more economical results if you arrange your raft flooring purchases under the heading of reinforced concrete / parameters / raft flooring parameters as in the picture. - In case you use V6, if you use the Structure+Basic interactive solution option, you will also alleviate the moment accumulations that occur under the curtains. - When using C25 in the superstructure, instead of using C30 in the base, it would be more correct to use C25 for the whole structure or the opposite process. After making the arrangements I mentioned above, in the analysis I made with V6, the thickness of the raft is 90 cm, the maximum stress value is 17.6tf / m² for the G+Q combination, 23.95 tf/m² for the G+Q+EX1 combination, the raft flooring reinforcements are Ø18/16 ALT and ALT in both directions. It comes out as TOP. Best regards.
Thank you very much for your interest. I want to switch to v6, but I just can't leave v5 emotionally.. My use of c30 was in terms of stapling. I have rigid curtains on the basement floor, but since it is in the design phase, the parking lot will be solved in architecture, accordingly my rigid curtains will be processed. they give ground depending on the thickness of the foundation (from the terzaghi formula). Thank you very much again.