A2 Irregularity and semi-rigid diaphragm

[teknikisler]

Is it necessary to carry out the controls mentioned in Earthquake Regulation 2.3.2.2 due to the A2 irregularity when a solution is made with the semi-rigid diaphragm option for a structure in the 1st degree earthquake zone, which is thought to be a hollow floor slab with A2 irregularity on one floor?

 

[insmuh_gk]

Since the slabs are included in the analysis, the displacements at the finite element nodes are found, so the cross-sectional effects are calculated and the reinforcement needs are determined. For this reason, the relevant article of the regulation is already fulfilled automatically.

 

[HakanŞahin]

Assuming a semi-rigid diaphragm, the slabs are included in the analysis and the displacements in the finite elements are found. However, only bending moments are taken into account in the reinforcement calculation. (For the calculation of beamed and non-beamed slabs) For A2-A3 irregularity control, it should also be checked whether the tensile or compressive forces in the plane are sufficient in the slab section... For this, the normal force values of F11 and F22 from the 3D frame can be seen in each combination and the maximum value in the critical section section can be checked. If necessary, reinforcement is added. In the program, it is planned to perform in-plane normal force control automatically. Good work..

 

[teknikisler]

First of all, I would like to thank you for your answer, I have a couple of questions that bother me, 1-) In order for the analysis to be correct, should it be entered in the story irregularities section of the floor parameters for the floor with A2 irregularity before the analysis is done, that there is a2 irregularity? 2-) When we solve with semi-rigid diaphragm assumption, should we solve the analysis with "...use response spectrum solution" option,

 

[Levent Özpak]

First of all, thank you for your answer, I have a couple of questions that stuck in my mind, 1-) In order for the analysis to be correct, should the A2 irregularity be entered in the floor irregularities section of the floor parameters for the floor with A2 irregularity before the analysis is performed? ?

Marking the irregularity line A2 in the floor parameters does not affect the analysis result. Only the reports show that the type a2 irregularity exists and is controlled by the user.

2-) When we solve with the assumption of semi-rigid diaphragm, the analysis "....response spectrum Should we solve it with the "use solution solution" option,

In case of elements such as stair dome vault etc. created by using the solution option together with the semi-rigid diaphragm option, it is recommended to make an earthquake calculation with the response spectrum and distributed masses. However, this situation is required as a requirement. It would not be very accurate to describe it.

 

[teknikisler]

What I understand from your answer, the analysis settings in the program are probably as follows...