A COMPARATIVE STUDY OF LIVE LOADS FOR A BRIDGE DECK WITH IRC AND AASHTO CODES.
Keywords:
LRFD, Moving loads, IRC,HS-20, IRC, Class A , Staad pro, AASHTOAbstract
The paper presents the comparison of the absolute structural parameters of the I-section concrete girder
bridge of varying slab thickness 365mm to 815mm under AASHTO HS-20 loadings and IRC Class A loadings. The FEA
Software Staad pro have been used to analyse the deck girder bridge. In this work the RC deck is modelled as the simply
supported beam and the bridge deck spanning in the one direction. The Bridge deck has a persistent length as 10m and
width as 12m. Different deck Thickness of the concrete bridge deck have been considered (365mm to 815mm). The
moving live loads have been assigned to the concrete deck bridge as per specifications mentioned in AASHTO and IRC:6
codes. Class A loadings have been considered from Indian Code IRC: 6 Section: II and HS-20 Loading have been
considered from the AASHTO LRFD HS-20. The study indicates that the values of the structure parameters of the Isection concrete girder bridge under AASHTO HS-20 Loadings are more when compared with the Class A loading of
IRC. Thus there is a need for a more uniform and realistic principles and standards of loads in future.
