PERFORMANCE OF CFRP AND BFRP AS PRE-STRESSING
Keywords:
Pre-stressed Bridge, Carbon fibre reinforced polymer, basalt fibre reinforced polymer, high tensile steel.Abstract
In this paper the effect of Carbon fibre reinforced polymer and basalt fibre reinforced polymer as a pre-stressing
tendons in a pre-stressed bridge have been studied. CFRP and BFRP as a pre-stressing material provides advantages in the
ductility of strengthened concrete and also avoid the low creep rupture limitations. Pre-stressing is generally having more
application in long span bridge. The parametric study is done by creating different models of pre-stressed bridge with BFRP
and CFRP tendons and then compared with high tensile steel tendons. The software used for analysis and design of bridge
is Midas civil-2018. Construction stage analysis is done considering the effect of time dependent material properties such as
creep, age and shrinkage. Result is then given by comparing the moment capacity, shear capacity, loss of stresses in tendons
and deflections in the structure by changing the thickness and depth of the girder. An optimization is also done for the
girders pre-stressed with BFRP and CFRP tendons to get an idea how much we can minimize a section by using these
tendons. At last cost comparison is carried out for the same girder pre-stressed with BFRP, CFRP and HT tendons to know
cost effectiveness.
