Can I publish open access articles on my personal website?
Check the agreement you signed with the publisher.  If you transferred the copyright and they don't explicitly allow this, then the answer is no.
Another easy way to check is using Sherpa Romeo.  For instance, you can see here that the journal SINUM does allow the author to post the published version on a personal website.  Meanwhile, you can see here that JCP allows posting (on a personal site) of the accepted version, but not the published version.