I am modeling and extradosed bridge with csi bridge software. I provide rigid link to connect between deck and cables. But I am confuse whether it is the proper way or not.
It appears to me that you have not taken an advanced civil engineering course. I suggest that you do just that in order to learn both the science and the practice. (And don't tell me that you don't have time - I for one would not like to walk or drive across a bridge that you have designed otherwise ... :-)