Review on Dynamic Analysis of PSC T-Beam and Box Girder Bridge Superstructure for Different Span Lengths

Abstract

The pre-stressed concrete bridges have excellent riding attributes that limits traffic vibrations, torsional rigidity, less likely to break prematurely continuous span, quality and the most significant trademark is natural frequency of vibration hardly matches with vehicle frequency therefore attained extensive acceptance in freeway, highway flyovers and in modern metro rail systems. As bridges are the significant structures ought to be capable to withstand static as well as dynamic loads specially, earthquake-induced load to achieve a structure that behave at the level of life safety under enormous earthquakes. The present article shows the linear dynamic behaviour of T-beam girder and box girder bridge deck and compares static as well as dynamic behaviour. Response spectrum analysis has been performed by utilizing Finite Element Method based software so as to check the resonance criteria of bridge and also to determine most ideal alternative from over two. The outcomes show that response parameters for box girder such as shear forces, bending moment, deflection, longitudinal stresses, time period, base reaction, and shear stresses are increases as the span length increases while fundamental frequency decreases. From the study it is finalized that box girder is the conservative solution as compared to T-beam girder bridge superstructure.