RC円筒殻における点荷重位置の影響に関する研究

概要

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The main purpose of this paper is to investigate both theoretically and experimentally, the effects of point load position on reinforced concrete cylindrical shells supported by pins at the four corners. The shells under one point load were roof-type and the strength and the nonlinear mechanical characteristics of the shell were studied for different load position. The theoretical study was conducted using the material and geometrical nonlinear finite element analyses including concrete cracking and tension stiffening effects. Nine-node degenerate think shell elements employing a layered discretization through the thickness were adopted. The effects of point load position on the two different central lines of shells on the strength and the crack patterns were investigated numerically. The experimental study was conducted on reinforced micro-concrete shell specimens. One point load was applied vertically on the shell surface into the final failure. The strength and the nonlinear behaviors of shells are discussed based on the results of the analysis and experiments.