Advantage of prestressed concrete bridge deck
• High-strength concrete and high-tensile
steel, besides being economical, make for slender
sections, which are aesthetically superior.
Prestressed concrete bridges
can be designed as class I type structures
stresses under service loads, thus resulting in a crack-free
In comparison with steel bridges, prestressed concrete
is ideally suited for composite bridge construction in which precast
prestressed girders support the cast in situ
slab deck. This type of con•
struction is very popular since it involves
minimum disruption of traffic.
Post-tensioned prestressed concrete finds extensive applications in long-span continuous girder
cross-section. Not only does it
sleek. structures, but it also effects considerable saving in the overall cost of construction.
In recent years, partially prestressed concrete (type-3 structure) bas been
ferred for bridge construction, because it offers considerable economy in the
use of costly high-tensile steel in the girder.