繰返し軸方向力を受ける部材の挙動に関する実験(その1)

Abstract

An experimental study is carried out in order to investigate hysteretic behavior of a steelbar subjected to repeated axial tension and compression. In the test program, all specimens ofSS4l mild steel bar simply supported at both ends have an identical cross section with dimensions15 mm x 15 mm, and their slenderness ratio varies from about 40 to 160. The repeated axial loadis applied centrically or eccentrically on the specimen through the loading apparatus which assuresfree rotation at both ends of the specimen, under the loading program that controls the relative axialdisplacement amplitude at a fixed value until the hysteresis loop stabilizes after a few cysles of load-ing. The loop stabilization, effects of slenderness ratio on the shape of the loop and effects of re-sidual deformation on the load carrying capacity of a bar are discussed based on the experimentalresults.