PARAMETRIC BEHAVIOUR OF BOX GIRDER BRIDGES



PARAMETRIC BEHAVIOUR OF BOX GIRDER BRIDGES UNDER DIFFERENT RADIUS OF CURVATURE & VARYING SPANS

ABDUL KHADER.A.S1, A.R.PRADEEP2 , Dr.T.V.Mallesh3 , S.R.Ramesh4
1M.Tech student, Department of Civil Engineering, SSIT, Tumkur-Karnataka, India
2 Assistant Professor, Department of Civil Engineering, SSIT, Tumkur-Karnataka, India
3 Professor and Head, Department of Civil Engineering, SSIT, Tumkur-Karnataka, India
4Professor,Department of Civil Engineering, SSIT, Tumkur-Karnataka, India

ABSTRACT: A box girder flyover is a transport system in an urban area with a high capacity, frequency and the grade separation from other traffic. Box girder flyover is used in crowded cities, crossover junctions, and metropolitan areas to transport large numbers of people. An elevated carriage way system is more preferred type of transport system due to ease of construction and also it makes urban areas more accessible without any construction difficulty. Here the present study focuses on the analysis of box girder, of an elevated box girder structural system.From the parametric study on behavior of box girder bridges by using FEM techniques showed that, as curvature decreases, responses such as longitudinal stresses at the top and bottom sections, shear stress, torsional moments, Bending moment and deflection decreases for three types of box girder bridges and there is not much variation for fundamental frequency of three types (SCBG, DCBG & TCBG) of box girder bridges due to the same span length. It is observed that as the span length increases, longitudinal stresses at the top and bottom, shear stresses, torsional stresses, bending moment and deflection increases for these three types of box girder bridges. As the span length is increased, the fundamental frequency decreases for these three types of box girder bridges. Also, it can be significantly noted that as the span length to the radius of curvature ratio is increased response parameters such as longitudinal stresses at the top and bottom, shear stresses, torsional stresses, bending moment and deflection get increased for three types of box girder bridges. As the span length to the radius of curvature ratio is increased the fundamental natural frequency decreases for these three types of box girder bridges.

Keywords: Elevated Bridge Structure, Box Girder Bridge, Radius of Curvature, Dynamic Analysis, Finite Element Modelling, Radius of Curvature.

PARAMETRIC BEHAVIOUR OF BOX GIRDER BRIDGES UNDER DIFFERENT RADIUS OF CURVATURE & VARYING SPANS
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