Ayando,
There's several dedicated software that deals with towers depending on the industry.
SAFI - General, covers towers poles
PLS Tower - transmission towers.
STAAD(X).Tower or MStower by Bentley,
TNX (former Risa) Tower - telecommunication towers
TSTower - Canadian software with integrated connections and foundation analysis.
Some other non-dedicated or non-US software's are capable of modeling and analyzing towers as well but I'm not familiarized with them.
DJ,
5+ruc+r@1 3ngin3(ER)