鉄筋コンクリート造耐震壁の動的実験

概要

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A dynamic experiment of two reinforced concrete walls was carried out as a preliminary test towards three-dimensional full-scale testing at E-defense. The two specimens were identical and 1/3 scale model of a plane shear wall with boundary columns representing lower two stories in a six-story wall-frame building. Upper stories were modeled with mass of steel weight over concrete stab. Only the height to the center of the mass from the base was changed between the two specimens to simulate the effect on the collapse mechanism, because the effective height of dynamic lateral loads may change to the change in distribution. The two specimens were subjected to the same series of earthquake motions, the intensity of which were amplified gradually, until up to failure. The first specimen Wall-A with the lower mass height failed in shear after flexural yielding as was expected from the calculated shear strength which was close to the flexural strength. The second specimen Wall-B, the calculated shear strength of which is apparently higher than the flexural strength, also failed in shear under the smaller input motion level. From the analysis on the hysteretic energy dissipation, this is estimated to caused by many cyclic responses due to longer period in Wall-B so that the total input energy was accumulated, although the maximum deformation amplitudes were not much larger than those of Wall-A.
一般社団法人日本建築学会の論文
2003-03-20