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Analytical Study on Paraboloid Shell Roof Structure using Finite Element Analysis Software

  • Unique Paper ID: 176946
  • Volume: 11
  • Issue: 11
  • PageNo: 7753-7758
  • Abstract:
  • Shells belong to the class of stressed skin structures which, because of their geometry and small flexural rigidity of the skin, tend to carry the loads primarily by direct stresses acting in their plane. In the design of new forms of concrete shell structures, the conventional practice is to select the geometry of shell first and then making the stress analysis. In this process no deliberated effort is taken to ensure the desirable state of stress in the material. Perhaps it is more logical to reverse this process. Ideally a concrete shell in its membrane state carries the external loads by pure compression, unaccompanied by shear stresses so that no tensile stresses develop and hence the reinforcement becomes necessary excepting for secondary effects like bending, shrinkage. In most of the shell roof is the predominant load is the dead weight. Hence it is advantageous to select the shape of shell in such a way that, under this condition of loading, the shell is subjected to pure compression without bending. This can be achieved by shaping the shell in the form of a which the parabolic shape is corresponding to the dead weight. An attempt is made to study the influence of thickness on the ultimate load of the Paraboloid Shells of circular Ground Plan. The Paraboloid Shells are analyzed to determine the influence of thickness in deflections (y), maximum absolute stress, membrane stresses (Sx), (Sy), (Sxy), bending stresses (Mx), (My), (Mxy) and shear stresses (SQx), (SQy) using the Software STAAD.Pro. Conclusions are made from the analysis results that the deflection, maximum absolute stress, membrane stresses, shear stresses of paraboloid concrete shells decrease with increase in thickness.
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  • ISSN: 2349-6002
  • Volume: 11
  • Issue: 11
  • PageNo: 7753-7758

Analytical Study on Paraboloid Shell Roof Structure using Finite Element Analysis Software

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