topic fire provisions in RC column in Robot Structural Analysis Forum

fire provisions in RC column

Djokaboris — Wed, 28 Aug 2024 15:36:23 GMT

Hi;

For the calculation of RC column with fire provisions, even a section as stocky as 600x750mm doesn't pass the eccentricity verification for fire. Can robot even calculate fire provisions for columns?? because did even a trial section of 1000mmx1000mm but still failed in eccentricity

Re: fire provisions in RC column

ouoba.diassiboalain — Wed, 28 Aug 2024 16:08:18 GMT

Hello ,
I'm not sure ,but I think the software is comparing first excentricity (Momment/axial effort ) and 0,15 h or 0,15b . h and b are your column section dimensions. You may try to increase your column section to increase 0,15h and 0,15b depending on the moment that cause the problem ( Mz OR My) . Or you may try make releases on your columns top , that will reduce moments on columns .

Re: fire provisions in RC column

Djokaboris — Wed, 28 Aug 2024 16:34:43 GMT

Thanks Sir @ouoba.diassiboalain , the releases actually "works". but i think is actually a hack because doing that implies there's no moment in the columns . increasing column section as large as we can also doesn't work.

Re: fire provisions in RC column

Djokaboris — Wed, 28 Aug 2024 17:06:26 GMT

Releasing both sides "works", but only the top doesn't change the error