thank u very much benjamin.your anwser was so useful.but my challeng is modeling of wire rope unit.i will attach the paper for u.i guse u can help me at this subject.do u have any information about abacus or ansys sofwars?in this softwars we can model the stiirups or steel,but when we are faced with wire rope unit it becames a challeng.if u have usefull link or files at this subjest,attache it for me.

thanks 

thank u very much benjamin