Parametric Study of Behaviour of Box Girder Bridges Under Different Radius of Curvature

Jefeena Sali, Kashif Quamar Inqualabi, Reji P Mohan

Abstract: Box girders are now prominently used in freeway and bridge systems due to their structural efficiency, better stability, serviceability, economy of construction and pleasing aesthetics They are most suited for bridges curved in plan because of its high torsional rigidity. A study of box girder curved in plan with trapezoidal cross section has been carried out in the present investigation. The analysis is carried under the dead load, super imposed dead load, live load of IRC Class A tracked vehicle and prestressed load. This paper focus on the parametric study of box girders with different radius of curvature by keeping the span, cross sectional shape and material properties constant. The parametric investigations performed on curved box girders helps to evaluate the effects of change in radius of curvature on the behavior of the box girders. This study would enable bridge engineers to better understand the behavior of curved box girders and the results presented will be a valuable guidance to them.

Keywords: Box Girder, Stability, Torsional Rigidity, Radius of curvature