Investigation of the Behavior of Cable Stayed Bridges for Different Heights of Pylon

Cable-stayed bridges are widely used due to their many advantages. In the current study, a thorough analysis of cable-stayed bridges with mixed type of cable configuration has been done. Using the MIDAS software, 16 sets of models, each with a span length of 420 m, have been created while taking into account the commonly used design codes. A parametric analysis of pylon heights ranging from 55 to 200 m has been done in this study. The effects of the dead load, superimposed dead load and Pretension load were taken into account during linear static analyses. For different pylon heights, the behaviour of structural parameters like displacement and bending moment of girder and pylon is examined. In this study, various structural parameters such as displacement, bending moment of girder and pylon, and axial compressive force on pylon are calculated. For a pylon height of 55 m, the maximum value of girder displacement is 0.963218 mm, which occurs at the middle of the side span. For a 200-m pylon height, the maximum pylon displacement value is 0.258026 mm, which occurs at the pylon's top. The maximum axial compressive force on a pylon is −57,531.2 KN at the pylon's base at a height of 200 m. This research will be extremely useful to structural engineers when designing a cable-stayed bridge.