Folding analysis of reversal arch by the tangent stiffness method

Shin-ichi Iguchi , Shigeo Goto , Katsushi Ijima , Hiroyuki Obiya(Japan)

Abstract

This paper presents the tangent stiffness method for 3-D geometrically nonlinear foldinganalysis of a reversal arch. Experimental tests are conducted to verify the numerical analysis. The tangentstiffness method can accurately evaluate the geometrical nonlinearity due to the element translating as arigid body, and the method can exactly handle the large rotation of the element in space. The arch in theexperiment is made from a thin flat bar, and it is found that the folding process of the arch may becaptured exactly by the numerical analysis with a model consisting of only 18 elements with the sameproperties.

Key Words

large displacement analysis; geometrical nonlinearity; finite rotation; folding experiment.

Address

Shin-ichi Iguchi and Shigeo Goto, FORUMEIGHT Ltd., 1-31 Tenya-machi, Hakata-ku Fukuoka, JapanKatsushi Ijima and Hiroyuki Obiya, Department of Civil Engineering, Saga University, 1 Honjou Saga, Japan

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