繰返し水平力を受けるコンクリート充填鋼管構造骨組の付着性状に関する実験的研究

概要

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Tests were carried out on six frame specimens consisted of square concrete filled steel tubular (CFT) columns and H-shape steel beams. These specimens were open frames which included one-bay and two-story. These specimens were around one-fourth scaling model of lower part of a prototype model structure. The steel tube of the column was 150x150x4.5mm with square section, and the steel beam were H-150x90x6x6mm and H-150xl50x6x9mm. They were subjected to cyclic lateral load at the beam of the second story under constant axial load. The main objective of the tests was to investigate the seismic behavior of the CFT frames basically. In particular, the bond behavior of the inside wall of the square steel tube and inner concrete was also studied. The test parameters were mechanical slip stopper, vacant space of the top of the columns and magnitude of axial load ratio. The load-deformation relations and the transfers of sustained axial force of steel tubes were investigated corresponding to the specimens with different types of mechanism of the stress-transfer between steel tube and concrete.
2008-03-30