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Behavior Of Concrete Helicoid Stair Under Mixed Loadings And Restrained Boundary Condition

International Journal of Civil Engineering
© 2019 by SSRG - IJCE Journal
Volume 6 Issue 8
Year of Publication : 2019
Authors : Vikas Gandhe
10.14445/23488352/IJCE-V6I8P102
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How to Cite?

Vikas Gandhe, "Behavior Of Concrete Helicoid Stair Under Mixed Loadings And Restrained Boundary Condition," SSRG International Journal of Civil Engineering, vol. 6,  no. 8, pp. 11-16, 2019. Crossref, https://doi.org/10.14445/23488352/IJCE-V6I8P102

Abstract:

The paper presents an analysis of helicoid stairs with different loadings with boundary restrained conditions. The helicoids stair was analyzed by Finite Element Method with a 90-degree helix angle, six curved elements,11 nodal points having a maximum of 72 degrees of freedom. The helicoid structure was discretized for 150 mm slab  thickness with four different types of loadings as Gravity load,*uniformly distributed load over an entire span length,* uniformly distributed load over an entire bottom half length * uniformly distributed load over an Entire top half-length. An isoparametric curved beam element used in the analysis is capable of modeling the curvature not only in the plan but also in elevation and producing the stress distribution along the centerline of curved length. All displacements in U, V, and W directions were .shown graphically along with the global directions. All shear stress resultants as Fx, Fxy, and Fxz were represented graphically. Inplane moments as  Mxy, Mxz, and TOR  were also shown graphically. All the salient values were also shown in a tabular form

Keywords:

Degree Of  Freedom, Helicoid stair, Helix Angle, Isoparametric Element, Semi loof Beam

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