伝統木造建築物柱脚の平面接触モデルに関する実験的研究

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This paper reports the results of quasi-static cyclic loading tests conducted for modeling the two-dimensional contact response between a foundation stone and a circular column base of traditional timber frames. Constant axial loads and cyclic forced rotations are applied to three column-base specimens placed on a stone foundation. Three sets of axial load conditions are considered for each specimen. The three specimens are subjected to step-wisely increasing, constant, and step-wisely decreasing amplitudes of cyclic rotations, respectively. In order to obtain the moment-rotation angle relationship at the column base, we estimate the position of the center of mass for the distributed reaction force in the axial direction. We observed from the tests that the magnitudes of the axial load and the differences among the cvclic loading programs have little effect on the relation between the rotation angle and the location of the center of mass, for which an empirical formula is provided.
2004-08-30