A A D D D D I I S S A A B B A A B B A A U U N N I I V V E E R R S S I I T T Y Y S S C C H H O O O O L L O O F F G G R R A A D D U U A A T T E E S S T T U U D D I I E E S S Analysis and Design of Precast - Cast in Situ Concrete Composite Bridges Kitaw Zewde November 2005