超極厚H形鋼の材質について

抄録

Although super giant H shapes are used progressively in the field of skyscraper construction, in recent Japan mechanical properties in each positions of H shapes have not clearly been reported. In this paper, their mechanical properties were examined by tension tests and Charpy impact tests respectively.
The deformation behaviours of H spapes was estimated by rolling of Plasticine model, and the differences of mechanical properties in each position of H shapes were considered to be caused by the difference of degree of deformation.
The results are as follows:
(1) There were not marked differences in yield strength and tensile strength at any position, while elongation decreased linearly with increasing strain by rolling.
(2) Impact properties near the surface region were higher than near the center of H shapes.
This tendency was affected by not only the deformation behaviour but also the thermal history of the process of H shapes making.