CONSIDERATION ABOUT THE EVALUATION METHOD OF THE SHEAR STRENGTH OF THE CIRCULAR SHAFT HAVING OPENING USING THE MATERIAL NON-LINEAR ANALYSIS

Abstract

 Because of a partial loss of area for opening, the shaft having opening secures a necessary shear strength by the residual section exept the opening. In general, the three-dimensional behavior is not considered with the structure around the opening, that may be not rational. Therefore, we checked the effect on the shear strength of the shaft by three-dimensional FEM analysis to simulate the concrete and the reinforcing bar. And also, we confirmed the influence of the thickness, the concrete strength, the quantity of the distributing bar and the layout of the opening, that have a large influence on the shear strength of the shaft. As a result, we confirmed that we might be able to evaluate the shear strength of the shaft having opening with a simple numerical expression.