変動軸力と繰返し曲げを受けるSRC構造非埋込み形柱脚の弾塑性挙動

摘要

兵庫県南部地震でSRC構造非埋込み形柱脚が変動軸力（引張力を 含む）を受けて破壊したことを鑑みて，震災後，引張力を受ける非 埋込み形柱脚の構造性能を検証するための実験が行われた。こ れらの研究では，終局曲げ耐力に関しては，軸力の有無（圧縮およ び引び張）に関わらず，実験値がSRC規準に示れる累加強度や， 平面保持の仮定の下で計算された終局強度を下回ったという報告は ない。%We confirmed the mechanical behavior of unembedded type column bases subjected to variable axial and cyclic flexural load through the structural tests of two series. The structural tests of two series are composed of the experiment on the specimen of a real large size and the half reduction size. From the test result, it was shown that limit rotation angle of column bases subjected to variable axial loading decreases. The reason for this cause is that local buckling and fracturing of main reinforcement occurs at column bases subjected to cyclic flexural load under the variable axial load compared with column bases under the constant axial load. In addition, we carried out the elasto-plastic analysis, and verified the accuracy of the analysis.