Hello there,

There is no provision for JEE ADVANCED in Qualification for JEE MAINS PAPER-2. For JEE advanced you need to attend the Jee paper 1(compulsory) . However if you want to pursue you career in architecture at IITs then you need to first qualify jee mains paper 1 ,then need to appear and qualify for Jee Advance exam and then sit for Architecture aptitude test(AAT) Conducted by IITs. Its basically a three step process.

Now, If you have achieved 8500 rank in jee main paper 2 ,you can definitely apply for NITs using JoSAA counselling. However it may be diffcult to say whether you may get any NITs with this percentile(if you are general category student) since they usually have a cutoff of around  97-98 percentile.

You can check your cutoff for B.Arch course in various NITs from this link

https://engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning

Good Luck !