Modelling of composite steel-concrete beams

Hello everyone... I have a question for you all, I'm writting my master thesis about modelling composite steel-concrete beams, so I'm interested which software is popular in countries around the world, or with which problems do engineers encounter during the process of modelling? You know, kind of things that we can't find in literature, or If you have any other information, situation or experience to share, please write about it... I need to see what's happening in other countries when it comes to composite structures... Thank you all in advance, I wish you successful and safe work.