Tips

[yapden333]

Hello, I follow your program and forum with interest. I would appreciate it if you could enlighten me on the points where I had some problems. When I consulted with the employees in the market, I saw that everyone did it differently. I couldn't get a clear answer. I want to learn the truth from you. I'm sure there are other users who are curious about them. Kind regards. question 1: which of the 2 boxes at the bottom should be checked in a fully rigid diaphragm solution seen in the picture, in a geared (hollow-filled) tiled structure, or which ones should be checked when, let's say, semi-rigid solving question2: which ones should we tick in the analysis settings in the picture, or decide according to what question3: When I want to create basement curtains, I do it with convert to panel. Is it necessary to mark basement curtains as flooded/not continuing on all floors? If we do not mark it, does our program perceive it as a normal carrier curtain or does it calculate as a basement curtain?

 

[civilization]

I am especially curious about the second question. I didn't fully solve the situation in the continuum, but when I say use seismic forces for the raft foundation, it seems to save the foundation, which does not save. If we give an example, let qzem be 15 and 22.5 with earthquake. Let the average stress be calculated as 17 in g+q, but let the average be 21 in earthquakes. now it does not carry the foundation in service loads, but it seems to carry in earthquake loads and the program does not give a safety error because the earthquake option is marked in the report section. but I think it should output according to the worst. This is the case in many projects I've reviewed. the second option was selected and the program did not give an error. I'm wondering what the truth of this is.

 

[2m proje]

Hello there; It is the answer for the 2nd question: Soil Stress (for G+Q) <= 15 Soil Stress (earthquake) <= 22.5 both conditions should be checked and provided separately. You don't have a chance to say that you only provided one In order to control the average stress, the stresses must be exceeded in very small tolerable areas. Best regards.

 

[yapden333]

Dear friends, thank you for your comments, I would appreciate if the forum administrators could help us in this regard.

 

[civilization]

Hello, this is the answer for question 2: Soil Stress (for G+Q) <= 15 Soil Stress (earthquake) <= 22.5 conditions must be checked and satisfied separately. You don't have a chance. In order for you to be able to control the average stress, the stresses must be exceeded in very small tolerable areas. Regards.

Unfortunately, I saw a lot of work that passed through the municipality and was checked for earthquake stress. The software should take this into account in the report section.

 

[MaFiAMaX]

Hello, 1- One-way ribbed slabs (hollow-hole) and non-beamed slab slabs (cork) must be modeled as semi-rigid diaphragms. Even if the rules about modeling are not written clearly in the 2007 regulation, it should be done in this way. In the 2018 regulation, it is clearly written how each structural element should be modeled. As stated in Article 4.5.6.2, UNI-WAY ribbed flooring is also included in the scope of "buildings where floors are not intended to operate as rigid diaphragms". Because, while the slab is rigid in the rib direction, it is not possible for a slab of 7 or 10 cm thickness in the other direction to operate rigidly unless it is a very small slab. The options under the semi-rigid diaphragm option allow earthquake effects to be taken into account in the design of floors and beams. In the first option, the moment and shear forces due to the earthquake along with the vertical loads are taken into account, while in the second option, the tensile and compressive forces on the floor plane are taken into account. Especially in case of shrinkage, you can observe the increase in reinforcement. This control is especially important in beamless slab systems. Regulation 4.5.6.5 describes these options.

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2- Only vertical loads and vertical+earthquake loads are controlled under the control of foundations. is being done. There was a lack of display in the report, but there is a more detailed display in the new version. Being an option is left to the engineer, and it may be thought to be a situation that may be needed. Negative stress control is also ignored by most, but numerically negative stress indicates levitation in that area of the foundation, which should not be. 3- In the R calculation, the decision is made by looking at the ratio of the shear force carried by the carrier system curtains in the whole system. While there is a coefficient called alpha-s in the 2007 regulation, there is Mdev in the 2018 regulation. The main thing here is to separate the main curtains of the system and the curtains we call soil/basement curtains in modeling. In order for ideCAD to distinguish this, we do the following: a- If there are completely rigid basement floors, we mark both X and Y directions as rigid floors on the floor settings page so that basement curtains on these floors are not taken into account. Thus, the software calculates alpha-s on this floor, taking into account the non-rigid first floor curtains for the alpha-s calculation. The regulation also requires it to be done in this way. b- Suppose you have built a curtain on one side of your building due to soil, and this curtain does not continue to the upper floors. But since the floor with this curtain is not surrounded by a basement curtain from other sides, does not fall under the definition of a rigid basement floor. For this reason, you cannot make a rigid basement floor marking as in item a. In order for you to tell ideCAD that the curtain you have set for that soil is not a system curtain, you will be exempt from the alfa-s calculation by selecting the "flooded / curtain that does not continue on all floors" option. Nothing changes whether you mark the curtains on the floor that you have marked as a rigid basement floor as "flooded / curtain that does not continue on all floors" or not.

 

[yapden333]

Hi, 1- One-way ribbed slabs (hollowsole) and non-beamed slab slabs (cork) must be modeled as semi-rigid diaphragms. Even if the rules regarding modeling are not clearly written in the 2007 regulation, it should be done this way. 2018 how each structural element should be modeled is clearly stated in the regulation. As stated in Article 4.5.6.2, ONE-WAY ribbed flooring is also included in the scope of "buildings where floors are not intended to function as rigid diaphragms. Because the floor is rigid in the rib direction, 7 or 10 cm in the other direction. thickness slab is not possible unless it is a very small slab. Options under the semi-rigid diaphragm option allow earthquake effects to be taken into account in the design of floors and beams. In the first option, the vertical loads and the moment and shear forces due to the earthquake are taken into account, while in the second option, the slab is taken into account. tensile and compressive forces is taken into account. Especially in case of shrinkage, you can observe the increase in reinforcement. This control is especially important in beamless slab systems. Regulation 4.5.6.5 describes these options.

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2- Only vertical loads and vertical+earthquake loads are controlled under the control of foundations. is being done. There was a lack of display in the report, but there is a more detailed display in the new version. Being an option is left to the engineer, and it may be thought to be a situation that may be needed. Negative stress control is also ignored by most, but numerically negative stress indicates levitation in that area of the foundation, which should not be. 3- In the R calculation, the decision is made by looking at the ratio of the shear force carried by the carrier system curtains in the whole system. While there is a coefficient called alpha-s in the 2007 regulation, there is Mdev in the 2018 regulation. The main thing here is to separate the main curtains of the system and the curtains we call soil/basement curtains in modeling. In order for ideCAD to distinguish this, we do the following: a- If there are completely rigid basement floors, we mark both X and Y directions as rigid floors on the floor settings page so that basement curtains on these floors are not taken into account. Thus, the software calculates alpha-s on this floor, taking into account the non-rigid first floor curtains for the alpha-s calculation. The regulation also requires it to be done in this way. b- Suppose you have built a curtain on one side of your building due to soil, and this curtain does not continue to the upper floors. But since the floor with this curtain is not surrounded by a basement curtain from other sides, does not fall under the definition of a rigid basement floor. For this reason, you cannot make a rigid basement floor marking as in item a. In order for you to tell ideCAD that the curtain you have set for that soil is not a system curtain, you will be exempt from the alfa-s calculation by selecting the "flooded / curtain that does not continue on all floors" option. Nothing changes whether you mark the curtains on the floor that you have marked as a rigid basement floor as "flooded / curtain that does not continue on all floors" or not.

Mr. Erhan Bey (static design), thank you for taking your time and sharing your valuable information with us.. I wish you a good work.