SQL Server - backup / restore schema only
I haven't used it before but there is an object in SSIS called Transfer SQL Server Objects.  It has an option to copy data or not and you can select copy all objects or just specific types of objects, permissions etc.

You could also look into doing replication but blocking the data portion of it.  In fact if you set up a snapshot replication that just pushed schema for each of your servers you could potentially have an automated process to do the push.

I think the SSIS option is probably your best bet though.