MOSCOW — Russia broadened its sanctions against Turkey on Wednesday to bar new Turkish construction and curb tourism activities in Russia, an expansion of measures put in place last month after Turkey shot down a Russian warplane under disputed circumstances.

Turkish construction companies working on skyscrapers, soccer stadiums and other projects in Russia can continue, but Turkish businesses will be prohibited from signing new contracts after Jan. 1.

The exemption for all current contracts seemed to reflect that the Russians will go only so far in limiting Turkey’s activities here for fear of being left with no roofs over their heads.