A. Upadhyay

Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

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Publications (4)1.14 Total impact

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    ABSTRACT: In this paper, cable-stayed bridges with single pylon and two equal side spans, with variations in geometry and span ranging from 120 m to 240 m have been studied. 3D models of the bridges considered in this study have been analysed using ANSYS. As the first step towards a detailed seismic analysis, free vibration response of different geometries is studied for their mode shapes and frequencies. Typical pattern of free vibration responses in different frequencies with change in geometry is observed. Further, three different seismic loading histories are chosen with various characteristics to find the structural response of different geometries under seismic loading. Effect of variation in pylon shape, cable arrangement with variation in span is found to have typical characteristics with different structural response under seismic loading. From the study, it is observed that the structural response is very much dependent on the geometry of the cable-stayed bridge and the characteristics of the seismic loading as well. Further, structural responses obtained from the study would help the design engineers to take decisions on geometric shapes of the bridges to be constructed in seismic prone zones.
    Earthquakes and Structures 12/2011; 2(4). DOI:10.12989/eas.2011.2.4.337 · 1.14 Impact Factor
  • 5th New York City Bridge Conference,, New York; 08/2009
  • M. Bhagwat, S. Sasmal, B. Novák, A. Upadhyay
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    ABSTRACT: Cable-stayed bridges with straight and curved deck geometry are studied for their free vibration response. A study on cable-stayed bridges with a single pylon with equal side spans is presented in this paper. Three-dimensional geometries of cable-stayed bridges with spans 120–240 m, A-shaped and H-shaped pylon are numerically investigated using FEM software ANSYS. Further response of straight bridges under El Centro earthquake loading is presented using dynamic time history analysis and the results are studied for different geometries. The effect of induced curvature in decks introduces coupling of different modes even at their initial phases whereas the modes are quite distinct in straight bridges. Under El Centro load time history bending stress, shear stress distribution in decks is studied for different geometries of straight bridges which gives the typical behaviour pattern of load sharing among the components of the cable-stayed bridge.
    Bridge Structures 06/2009; 5(2-3):87-95. DOI:10.1080/15732480903142450

Publication Stats

2 Citations
1.14 Total Impact Points

Institutions

  • 2009
    • Indian Institute of Technology Roorkee
      Roorkee, Uttarakhand, India