Raft Foundation Excess Reinforcement Problem

[damlatpz]

I would like to consult you about a problem that we have faced for a long time. Basically, the raft anchors very often when the reinforcement axes collide with the column, but when we draw the reinforcement axis manually, this problem disappears. We went back and changed this in almost every project, then we got 20 cm more in between, 12 cm in between. Is there a reason for this?

 

[Levent Özpak]

In the program, the main reinforcements in beamless raft are determined according to the design moments where the calculation axis passes. If there is a larger moment in a different coordinate, additional reinforcement is thrown to meet this moment. There is no clear rule regarding the determination of the location of the reinforcement calculation axes. However, for an economical design, the reinforcement axles can be passed where the design moments are the least. The moments of the calculation axis and the required reinforcement areas can be examined from the raft slab reinforced concrete dialog and from the 3D frame mode in the Perspective Window.

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[damlatpz]

We realized that when we designed indented raft flooring, we arranged this situation ourselves by giving the right and left distances, the problem disappeared. anyway, we wanted to consult you, thank you, good work.