補剛リブを有する鉄筋コンクリート屋根形円筒シェルの非線形解析

概要

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The main purpose of this paper is to investigate the nonlinear behaviors of reinforced concrete roof-type circular cylindrical shells stiffened with a rib, both theoretically and experimentally. In this analysis, two different types of supporting conditions are considered. One is a four-point simply supported-type shell and the other is a four-point supported cantilevertype shell. A stiffening rib on the overall shell structures are investigated. The experimental study is conducted on reinforced micro-concrete specimens. Circular cylindrical small scale models with different boundary stiffnesses and different point-supporting conditions are used. These specimens are loaded by uniform vertical load to failure. The theoretical study is conducted using material and geometrical nonlinear finite element analysis including concrete cracking and tension stiffening effects. Degenerate thick shell elements employing a layered discretization through the thickness are adopted. A DruckerPrager type yield function is used in this analysis and a maximum tensile stress criterion is considered. The critical loads and cracking patterns are obtained by FEM calculations and those results are compared to ones in the experimantal study. The interactions between the shell and the stiffening members, and the effects of both stiffening members and point-supporting conditions on the overall behaviors of the structures are obtained.
東海大学の論文