Abstract:
Seismic assessment of bridges is very important to know the structural deficiencies in
the existing bridges. In the recent past earthquakes, structural deficiencies in many of
the existing bridges have been observed, because most of them were constructed
before the advancement of seismic code. This study deals with seismic evaluation of
two bridge substructures to know its seismic performance. The finite element models
of two bridge substructures have been developed in SAP2000. The response spectrum
analysis, nonlinear static analysis and capacity spectrum methods have been
employed to determine the base shear, capacity and demand respectively. The
response spectrum analysis and the capacity spectrum method have been done by
using the design response spectrum given in IS: 1893-1984, IS: 1893 (Part 3)-2014.
The seismic deficiency has been obtained under MCE condition as per IS: 1893 (Part
3)-2014. The reinforced concrete (RC) jacketing and carbon fiber reinforced polymer
(CFRP) jacketing have been employed for improving the seismic performance of the
bridge piers. The retrofitted bridge piers have been modelled in SAP2000 for
evaluation of its performance by using the pushover analysis and capacity spectrum
method.
