端部回転を受ける免震用積層ゴムの弾性理論

概要

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The end faces of laminated rubber bearings are subjected to large rotation in cases where the beams to which the bearings are attached are low in stiffness or are omitted. Since there have been few studies on the effect of end rotations on the mechanical properties of bearings, many points remain unclear. In this study, based on the Haringx theory, exact load-deflection relations are derived considering end rotations. Then, simplified expressions are derived as a first approximation, which make it easy to understand the effect of end rotations on the mechanical properties of bearings. To show another advantage of these approximate expressions, a bearing rotationally constrained by a superstructure is analyzed. It is shown that the solutions can be easily and accurately obtained by using these expressions, In addition, applicable deformation limits of these expressions obtained by elastic theory are presented. Based on numerical studies, effectiveness and accuracy of the above expressions are presented.
社団法人日本建築学会の論文
2006-10-30