集中荷重を受けるRC屋根形円筒シェルの縁部材剛性に関する研究

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The main purpose of this paper is to investigate the nonlinear behaviors and ultimate strength of reinforced concrete roof-type circular cylindrical shells with edge members under concentrated loading. The cracking patterns under the influence of edge member stiffness, which consists of edge beam stiffness and edge arch one, are investigated both experimentally and theoretically. In these analyses, two different types of supporting conditions are considered. One is a four point roller supported corner-type shell and the other is a two point roller supported cantilever-type shell. The theoretical study is conducted using material and geometrical nonlinear finite element analyses including concrete cracking and tension stiffening effects. 9-node degenerate thick shell elements emplying a layered discretization through the thickness are adopted. The experimental study is conducted on reinforced micro-concrete specimens. Those are loaded by concentrated vertical load to failure. These results are compared with the results of Authors' previous experiment. The ultimate strength for each shell is obtained by elasto-plastic analysis including geometrical nonlinear effects, calculations based on elastic buckling analysis and initial imperfections considering lASS Recommendations, and failure experiments. The interactions between the shell and the edge members are investigated. Cracking patterns of shell surfaces and edge members, the load level at the first cracking and the other mechanical nonlinear behaviors under the influences of edge member stiffness and supporting conditions are obtained.
東海大学の論文

集中荷重を受けるRC屋根形円筒シェルの縁部材剛性に関する研究

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