I not really sure what to say about these.
They are interesting photos of other people's art work, but from a photography point of view there's not a lot to say.
Well the bridge one is a photo that could be critiqued, but there's not a lot going for it to be honest.
I think a better way to portray these would be to pull back wider and show the environment as well as the art.
Maybe include people going about their business around them. Then the photos would have some of your personality and style.
Just my 2 cents