Given the interdisciplinary nature of urban studies research, you may need to use multiple databases during your research. Urban Studies Abstracts is a great starting point since it too is interdisciplinary. Once you're exhausted the contents of this database, try one that specializes in a particular discipline (e.g. architecture, public policy, sociology), or ask a librarian for additional suggestions specific to your research topic.
The following databases specialize in the journal literature of an academic discipline. Try one of these to discover research about cities and urban issues from a disciplinary perspective.