I have bunch of tables in a tablespace. I want to export all these tables and recreate them in the same tablespace.

If i export in IXF format , does it gather all the views , triggers , aliases , grants associated with these tables ?

Looks like IXF format only export the table structure with indexes.

What is the best way to extract every depending object of a table.

I tried db2look with -t option and it is not of much help. Any suggestions !!!!

db2look should get what you want, but you may have to use some other options in addtion to the -t. I will let you do the detail research on that.