Soil Load + Selection of Analysis Method

[SonDurak]

Hello there; I have a few questions; 1) Do we need to additionally affect the load of the soil filling and lean concrete to be made on the foundation due to the sub-basement shear? 2) What exactly is the difference between Semi-Rigid diaphragm and Fully-rigid Diaphragm options? Which one should we use in which situation? 3) Response Spectrum method is suggested by the program since a solution is made with ladder in semi-rigid diaphragm, is there any harm in using this method? Is the ground amplification value in geotechnical reports used in foundation design? Are the beams used in the attic included in the calculations? Thanks...

 

[Levent Özpak]

Hi; I have a few questions; 1) Do we need to additionally affect the load of the soil filling and lean concrete to be made on the foundation due to the sub-basement shear?

Hello, The soil load on the raft flooring in the beamless raft flooring

2) What exactly is the difference between Semi-Rigid diaphragm and Fully-rigid Diaphragm options? Which one should we use in which situation?

With the full rigid diaphragm option, the floors work as full rigid diaphragms in the floor plane. and the diaphragm is infinitely rigid enough to transfer horizontal loads to the nodal points. The slabs are solved independently of the model and the loads of the slabs are given to the beams as external loads at the finite element points. With the semi-rigid diaphragm option, the slabs are solved together with the structure.Beamless slab systems, semi-rigid diaphragm option in tunnel formwork systems It is recommended to analyze according to stair, dome and vault fog. If it is to be solved by including it in the foundation, the support conditions should be defined according to the solution together with the structure, and the analysis should be done with the semi-rigid diaphragm option. In other systems, both options can be used.

3) Response Spectrum method is suggested by the program since a solution is made with ladder in semi-rigid diaphragm, is there any harm in using this method?

It is okay to use this method. This method is already recommended.

Are the beams used in the attic floor included in the calculations?

If the beams are connected to columns or curtains and are entered in the project, they are solved together with the system. If it is not connected, you have not already entered these elements in the carrier system, so it is not included in the calculations. Good work

 

[efsane]

Mr. Levent... we clashed with our civil engineer friend in the municipality on an issue... should we enter a live load on the raft basis or not... in cases where there is a filling for the sub-basement or not.?

 

[sereze]

Will the ground load on the raft be entered as + or -?

 

[YasinTezel]

Should the soil load on the raft be entered as + or -?

The weight of the soil fill on the raft foundation should be entered as positive (+) pavement load. In the raft foundation settings, the coating load --> " The value calculated using the "User defined" option can be entered.