In general terms and in the absence of more specific information about the nature of the works covered by the DAs, as an Owner you are not legally entitled to any compensation unless the works arose from an insured event, BUT you may seek that by way of a formal request to the Secretary of your Owners Corporation and see what eventuates.
Come back with some further information about the nature of the major works, and particularly those benefiting only some Owners, and some more comments / advice may then ensue.