You can certainily try to sue them, but unless there's more to the accident than you have written about, you will likely lose.The fact that somone is injured on another's property does not make the property owner automatically liable for the person's injuries. There instead must first be fault, which is usually in the form of negligence, or unreasonable carelessness. If there was no fault, there is  no liability or obligation to pay. Unless you believe--and can prove--that it was unreasonably careless to have a bolt of fabrice in that location, then it is very unlikely that you will be able to prove fault. Sometimes when people are injured, there is no one else financially liable; that seems to be the conclusion that the university and/or it's insurer have come to, if they did not pay your claim.