An Investigation of the Behavior of Box Girder Bridges Determined by Experiments

structural engineering

The Bhopal Metro or Bhoj Metro is an under construction rapid transit system intended to serve the city of Bhopal, India, the capital of the Indian state of Madhya Pradesh. The total system consists of 6 corridors covering a distance of 104.87 kilometres. Metro Rail Transport has been implemented in order to handle the traffic needs. Various structural components make up a conventional box girder bridge. The current work focuses on the parametric analysis of curved single cell box girder bridges. Five box girder bridge models with varied curvatures and constant span lengths were used for the parametric research. A box girder bridge example is chosen from the literature for a validation study of the finite element modelling technique. The example box girder is modelled and examined in SAP 2000, and it is discovered that the findings are reasonably consistent with those mentioned in the literature. The five box girder bridges are modelled in SAP2000 for the parametric research. Cross-section, material quality, and span length are unaffected. The radius of curvature is the only variable that changes. The box girder bridge's superstructure is made up of a single cell box in cross section. Only the horizontal direction is variable in the bridges' curvature. Each model is put through a self-weight and moving load test using an IRC class A tracked vehicle. Both a modal analysis and a static analysis of moving and dead loads are carried out. Recorded are the longitudinal stress, bending moment, torsion, deflection, and fundamental frequency at the top and bottom of cross sections. In comparison to a straight bridge, the reactions of a box girder bridge with a curved design are studied. A parameter is used to indicate the response ratio. According to the replies, the characteristics such as torsion, bending moment, and deflection are growing as bridge curvature increases.

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