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

Vikas Gandhe

doi:https://doi.org/10.14445/23488352/IJCE-V6I8P102

Research Article | Open Access

Volume 6 | Issue 8 | Year 2019 | Article Id. IJCE-V6I8P102 | DOI : https://doi.org/10.14445/23488352/IJCE-V6I8P102

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

Vikas Gandhe

Citation :

Vikas Gandhe, "Behavior Of Concrete Helicoid Stair Under Mixed Loadings And Restrained Boundary Condition," 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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