Abstract
Very large stresses are predicted by finite element method at a point where there is an abrupt change of boundary conditions. Therefore unlike common problems for which the results converge to true solution with the refinement of mesh, the use of fine mesh for the coupling slabs of laterally loaded shear wall structures results in serious overestimation of the stresses at the tip of the wall. This concentration of stresses at a single point is called 'Singularity of stresses'. Since concrete is a nonlinear material the properties of which depend upon the state of stress, it was presumed that the singularity of stresses would affect drastically the theoretical behavior of reinforced concrete members. Therefore the effect of the singularity of stresses on the theoretically predicted load-displacement history and ultimate load of coupling slabs was studied by the author and details of that work are presented in this paper.
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