The nine suspects were each handed 101 life sentences, the state-run Anadolu news agency said.
German rail operator Deutsche Bahn said it expected long-distance train transport at the central station to be disrupted from 10 am to 2 pm local time.
A witness told Reuters she saw a man take out a knife from his sleeve and then stab a young girl and then a second woman.
Forest fires east of Marseille have left thousands of travellers stranded across southern France, French rail officials and media reported on Sunday.
Belgian authorities on Wednesday identified a Moroccan man behind a foiled nail bomb assault on a busy Brussels train station, the latest in a wave of attacks to hit Europe.
A train station manager has taken partial blame for a deadly head-on collision that claimed at least 23 lives in one of Italy's worst rail accidents, according to media reports on Thursday.