Half Hour Day Trips- The Norrish Central Library-Portsmouth.

I work in a library but I also feel the need to see and visit each new day tripping town or cities library I find myself in for a nose. Looking up ones nearby for my chosen day trip out to Portsmouth, I saw the beauty of The Norrish Central Library. Concrete, brutal and tiles all in a row.

Built in 1976 by architect Ken Norrish, it is very grand and when I got my first glimpse driving around the corner I was very impressed. All white and round and shiny in the sun, it made me feel calm as if in a small white tile paradise. You can read all the things you want to know about the library and its surroundings HERE and HERE.   

Oh dear.

I cant find anything out about these pillars, does anybody know? What do they mean? Are they portals?