this statement reads to me like a nice personal essay for UNDERgrad admissions (minus the math degree mention). what i get from this statement is that you're going to grad school to find yourself, b/c you haven't found it yet, with no clear end in mind, and a lot of superficial reasons for picking structural engineering (my screensaver is a picture of a flower, but this doesn't make me a good candidate for botany programs, no matter how much i wonder how it's so pretty).
i think you've gotten a lot of stellar advice so far, in this thread and the first one, that i urge you to consider more seriously. to ME, the first paragraph is not funny; in fact i feel you come off as lazy and naive and would toss the essay aside immediately. try to come up with academically-based reasons that you are a good match for a structural eng. program. how did you come across all these different specific topics that interest you? were they inspired by classes you took? books you read?
the parts about these interests, btw, are the strongest points, but i do think there are too many. if you want to keep them all in, try to show how they connect with one another more so your essay shows a clear purpose.
which brings me to my last point: remember the prompt is asking you for an OBJECTIVE, first and foremost. there are too many potential jobs listed and too many potential research interests listed for any focused objective to be determined, and that's the exact kind of giant red flag adcom's will take notice of and cast aside.