ideCAD stiffness

[osmanbayrak]

If we transfer a file from İdecad to Sap2000, the toothed slabs drawn in idecad are loaded onto the beams. So where do the rigidities coming from the cross section of these teeth go? Doesn't it directly affect the irregularities on the building?

 

[Ismail Hakki Besler]

Re: İdecad Riijitlik

If we transfer files from İdecad to Sap2000, it throws the threaded slabs drawn in idecad as a load to the beams.

Does not select Semi-Rigid Diaphragm Model the threaded floors as semi-rigid diaphragms.

So where do the stiffnesses from the cross-section of these teeth go? Doesn't it directly affect the irregularities on the building?

Add an example projection that includes the situation you mentioned above that you created with ideCAD, show the teeth you mentioned and write down which building irregularity it affects. In this case, we can understand you more accurately and make a more accurate interpretation. In ideCAD, if you solve with the semi-rigid option, the system as a whole is handled instead of transferring the load of the teeth to the person carrying it. No, if you model it as classical load transfer instead of this way, the teeth transfer loads to the beams they step on. These rigidities you mentioned are taken into account in the global stiffness matrix of the structure and do not go anywhere. By modeling the interdental plaque and teeth together, the building behavior is modeled more accurately. Just as the structure is modeled in ideCAD, it is transferred to sap2000 as it is modelled. If you analyze with the semi-rigid diaphragm option, you will get these rigidities just right. In semi-rigid and fully rigid solutions, the periods with mass participation x and y do not change, but the main difference is the calculation of in-plane effects in slabs. The earthquake code that will be published in the future says that these in-plane effects should be calculated and it should be shown that floors in buildings with A2 A3 irregularity can safely meet these effects. And such structures definitely want to be solved as an elastic diaphragm (semi-rigid diaphragm). In addition, the vertical calculation results give considerably different results in elastic diaphragm and rigid diaphragm solutions in hollow slabs. ideCAD includes both rigid diaphragm and elastic diaphragm analysis options as analysis options. And the way you model it, sap2000 also transfers it. If you are asking us which option should I model with, I would recommend the semi-rigid option without hesitation.