Parametric Study of Structural Response of Post Tensioned Box Girder Skewed Bridge

Abstract

Bridges are essential and hierarchical structures and facility required for the ac- tivity of a general public. Bridges are a key element especially on the planets' urban communities and towns where either conduits or natural barriers counteract transport to the opposite side. Due to geometric and space constrains, when the crossing intersects with an angle other than 90 , then skewed bridges have proved to be useful. In this paper, analysis of a single cell post-tensioned rectangular, trapezoidal box girder and double cell post-tensioned rectangular and trapezoidal box girder bridge is done for varying skew angles (0 to 60 , with 100 intervals) using nite element-based software (CSI Bridge). Models of nite element for both rectangular and trapezoidal box girder bridges were done, with varying skew angle and keeping material properties, boundary conditions constant. All the models were analyzed for self-weight and vehicular load (IRC Class A loading) as per IRC 6:2016. Parameters such as torsional moment, longitudinal moment, displacements and stresses were studied for developed models and compared for both cross sections of box girder. Analysis show signi cant di erence in the val- ues of torsional moment, displacements and stresses. Rectangular box girder with double cell shows better performance when subjected to applied loading