A2 Irregularity and Semi-Rigid Diaphragm (Elastic Diaphragm)

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cakilomer

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I wish everyone good work and success in their work. I wish the ide officials success in their work. I had the opportunity to examine the semi-rigid diaphragm in detail with the document I obtained in the forum. The results I obtained are as follows, giving dangerous results as a result of the rigid diaphragm in buildings with A2 irregularity. The main reason for this is the floors. Structures with A2 irregularity occur in structures that are not geometrically uniform and there are certain conditions in the regulation. These conditions are issues such as gross area void area ratio and slab discontinuity. My main question is that in the program A2 and A3 irregularities, it is stated that the user checked, of course, we, as engineers, need to examine the structure, we can manually calculate and control the void ratio from the conditions in the regulation, but how should we use to check the slab discontinuity, can we share 2 different types of pictures from the shell results? ? Or can detailed information be obtained by other methods? Also, in order to detect this slab discontinuity, do we need to analyze the system again semi-rigid (because semi-rigid slabs are calculated) or do we need to perform rigid analysis? Good work to all my colleagues OMER FARUK ÇAKIL INS. ENG
 
Re: A2 Irregularity If there is A2 irregularity in your structure and you have solved it with the semi-rigid diaphragm (elastic diaphragm) option, the resulting slabs are calculated as reinforced concrete. is designed considering in-plane forces reinforcement is placed accordingly. If you want to print this information in detail, you can print "floor detail" from the report section. Furthermore, from the visualization shell results section, F11 and F22 in-plane forces, As1 and As2 values give "reinforcement areas at 1 meter distance" that must be met at the bottom and top of the floor. It will be sufficient to examine these issues and mark them as A2 irregularities and solve them semi-rigid. In addition to this examination, there is also the possibility of checking A2-A3 irregularity in the report section. In areas where the floor space is critical, you can have the program check whether the floor thickness is sufficient for earthquake effects in the direction of the earthquake. If you call, friends in technical service will show you how to use this command. In the 2007 Earthquake Regulation, there were round words about this issue. We hope and expect that this issue will be clarified in buildings with A2 and A3 irregularities in the new 2016 earthquake regulation.
 
A colleague of mine who contributed to the commission that prepared the new earthquake regulation, stated that in the new earthquake regulation that will come into force in 2016, the minimum flooring thickness in ribbed floors was increased from 5 cm to 7 cm and the structure had to be solved with the semi-rigid diaphragm option in order to make it smaller than 7 cm, also A2 and A3 irregularities. He said that in order to take into account the effects of bending and normal force in the floor plane in buildings with a semi-rigid (elastic diaphragm) diaphragm, it is necessary to solve the problem.
 
Re: A2 Irregularity and Semi-Rigid Diaphragm (Elastic Diaphragm Yes, Mr. Ismail, this issue needs to be clarified. Because only in our country, so many hollow floor types are preferred in recent years. and semi-rigid diaphragm (elastic diaphragm) solution gives healthier and more precise results, and I believe that this should be reflected in the regulations.
 
Re: A2 Irregularity and Semi-Rigid Diaphragm (Elastic Diaphragm
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In summary, in the new earthquake code; Modeling of Slabs as Semi-rigid diaphragm (Elastic diaphragm shell finite elements) Modeling of curtains with shell finite elements Modeling of polygonal curtains with shell finite elements Modeling of basement curtains with shell finite elements A2 A3 irregularity and Semi-A3 irregularity Rigid Diaphragm issue is also discussed in detail in this chapter
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