IRREGULARITY

E

emrebagdu

New Member
In terraced projects, the A1 irregularity nbi value on the terrace floor rises above 2. What kind of way should be followed to reduce the nbi value below 2. I am attaching the project. I will be glad if you help. good work
 
Hello, First of all, it is stated in Disaster Regulation Article 2.3.2.1 --A1 and B2 type irregularities are the irregularities that are effective in the selection of earthquake calculation method as stated in 2.6. These irregularities have no effect when Dynamic Analysis is performed. However, if you ask how to reduce the nbi values in the project; In the Analysis Settings/TDY Options tab, you can uncheck the line -Also consider center of stiffness in eccentricity effect-. (There is no need to take this into account, since the difference between the rigidity and the center of mass in the project is less than 5% of the building length.) In addition, a beamless raft foundation was designed in the project. Checking the --Consider Soil Structure Interaction-- option in the Analysis Settings/Basic tab will reduce the nbi values below 2.
 
hello friends, I have a few questions about irregularities. I am solving a 3-storey and curtainless structure with a building height of 13.20m in the 3rd degree earthquake zone. My first question is should I solve it as high ductile or should I solve it as normal ductile. My second question is that if I solve it in high ductile, if I solve it in normal ductile, A1 irregularity occurs on all floors in the building and B2 irregularity occurs on the terrace floor. I looked at tdy to see if it's allowed or not, but I couldn't find a satisfactory answer. If there is permission, there is no problem, but if this is an undesirable situation, what should I do to overcome this problem.
 
"prosecutor":3i8y6euh" said:
hello friends, I have a few questions about irregularities. I am solving a 3-storey structure with a building height of 13.20 m in the 3rd degree earthquake zone, with a building height of 13.20m. My first question is should I solve it as high ductile or normal ductile?
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Hello. The following regulations will shed light on you when choosing the ductility level of the structure 2.5.1.6 Structural systems without curtains with normal ductility level can only be allowed in 3rd and 4th degree earthquake zones, with the following conditions : Reinforced concrete buildings defined in (a) 2.5.1.4 can be constructed provided that HN<= 13 m (b) Except for those defined in 2.5.1.4, the structural system is only ductile. Reinforced concrete and steel buildings consisting of frames with normal level can be constructed provided that HN <=25 m Article 2.5.1.4 With beamless slab reinforced concrete systems without curtains, columns and beams can be constructed in any of the conditions given in 3.3, 3.4 and 3.5. filled or filled that does not provide one Gearless and cassette slab reinforced concrete systems will be considered as systems with normal ductility level.
My second question is that if I solve it in high ductile, if I solve it in normal ductile, A1 irregularity occurs on all floors in the building and B2 irregularity occurs on the terrace floor. I looked at tdy to see if it's allowed or not, but I couldn't find a satisfactory answer. If there is permission, there is no problem, but if this is an undesirable situation, what should I do to overcome this problem. According to 2.3.2.1[/b], A1 and B2 type irregularities are irregularities that are effective in the selection of earthquake calculation method, as stated in 2.6. These irregularities have no effect when dynamic analysis is selected . I wish you good work
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thank you very much for the information you have given and also for your interest Mr. Levent, good work.
 
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