Erratical Results Of ETABS in Longitudual Reinforcements

[CivilTanju]

hi all,

yesterday I have encountered a very strange outputs of etabs. I was analysing single storey structure, load case was only with gravity uniform loads on floors (rigid diaphragm), everything went so normal run the analysis and after that i run the design/check( concrete frame,EuroCode-2) i get some longitudual reinforcement outputs for columns on the screen thinking that these are normal results program supposed to create. Then I added some additional(4) storeys on top of the ground floor (load case and code was same). But even now the structure was comprised of 5 floor, the longitudual reinforcement was same with last result on the ground floor columns.

It made me think that longitudual reinforcement is provided only with min percentage specified on code(Eurocode-2) as long as concrete cross section bears all the axial-load capacity.

Any idea??


Best Regards,

 

[Murali27]

Of course, you set the min & max value for the percentage of reniforcement.

Pls change the min value to 0.001 and check the steel requirement.

Hope this helps

Cheers

 

[ASCE07]

you need to check the min values for column. If that is not being exceeded your output will not change. try reducing column size.