STABILITY ANALYSIS OF ORTHOTROPIC REINFORCE CONCRETE SHEAR WALL

J. C. Ezeh, Owus M. Ibearugbulem, Uchechi T. Echehum

Abstract: This paper studied the stability analysis of orthotropic reinforced concrete shear wall panel with all edges simply supported by the application of Ritz method. The study was carried out through a theoretical formulation based on applying polynomial series deflection function in Ritz method. The polynomial series as used here was truncated at the fifth term, which satisfied all the boundary conditions of the panel and resulted to a particular shape function for simply supported edges (SSSS) panel. Orthotropic parameter ratios of flexural plate rigidities in x, y and x-y directions to flexural plate rigidity in x direction are 1.0, 0.5 and 0.1 respectively. The critical buckling load obtained herein based on this orthotropy for different aspect ratios were compared with those obtained by Iyengar. This comparison showed that the maximum percentage difference recorded is 0.01382%. For aspect ratios of 0.5 and 1.0, the critical buckling loads are 42.74Dx/b2 and 16.799 Dx/b2.

Keywords: Critical buckling load, in-plane load, shape function, boundary conditions, total potential energy functional, orthotropic parameter, reinforced concrete.

DOI: https://doi.org/10.15623/ijret.2014.0302038