beam raft foundation problem

K

k.sener

New Member
Our floor safety factor is 15. When I define a 60 cm beamless raft foundation, I get the message that the floor safety is insufficient and the stresses in figure 1 occur. but when I define a beam on only one side of the foundation, that is, when the beam is rotated to the raft, the stresses on the raft foundation are 0 as in figure 2. and as the raft floors are diluted, they cannot add additional anchors to any column. Do you think this is normal? Can you help? (Program ideCAD Static 6 (Ver 6.01))
 
Hello, In rafter raft foundation systems, you must connect the columns with the continuous foundation beams and create slab cells. Defining a beam on one side of the system and defining a single slab is not in compliance with data entry rules. To sum up: For the definition of rafter raft, you must connect the columns with continuous foundations and define raft laying in the intermediate cells. For the definition of raft without beams, without using a continuous foundation beam, you should draw a single contour with the slab edges and define a raft slab, and if necessary, define more than one calculation axes and go to the reinforcement arrangement. If the floor safety is insufficient in the definition of rafter raft, it may be beneficial to define a console in the system.
 
If the stress is only at the edges wouldn't it be enough for us to cross the beams at that point? When it is beamed, we need to cross all columns as beams.
 
In rafter raft systems, the column cannot be connected to the raft floor without the foundation beam.
 
Now it's resolved. then either the thickness of the foundation will increase or it will be completely beamed. Thank you for dealing with the matter so quickly.
 
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