中間支承を有するRC屋根形円筒シェルの集中荷重下における力学挙動に関する研究

概要

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The main purpose of this paper is to investigate the strength and nonlinear behaviors of reinforced concrete roof-type cylindrical shells supported by pins at four intermediate points under concentrated load. The nonlinear mechanical characteristics of shells were studied both experimentally and theoretically. The experimental study was conducted on 3 reinforced micro-concrete shell specimens. Concentrated vertical load was applied at the center of shell surface into the final failure. The theoretical study was conducted using the material and geometrical nonlinear finite element analyses including concrete cracking and tension stiffening effects. Nine-node degenerate thick shell elements employing a layered discretization through the thickness were adopted. The effects of material properties, shell thicknesses and edge members on the strength of shells are investigated and discussed based on the results of the analysis and experiments.