Heavy Gauge H-shapes with Excellent Seismic-resistance for Building Structures Produced by the Third Generation TMCP
Heavy gauge H-shapes under the brand names of RIVER TOUGH 325 and 355, have been developed for SM520CTMC and SN490CTMC grades of JIS G 3106 and 3136 for building structures. Their high strength and toughness were achieved by enhanced refining mechanism in would-be-called the third generation TMCP, which is a new hot rolling method for raising ferrite nucleation rate by promotion of VN precipitation in the austenite phase by using a V-N bearing steel. The results of full scale loading tests carried out on a column-beam structure, in which the column consisted of the newly developed heavy gauge H-shape, proved the column to have a sufficient deformation capacity and to ensure a safe structure as a material for high-rise buildings.
V-N bearing steel , heavy gauge H-shapes, TMCP, VN precipitation, ferrite nucleation.
Tatsumi Klmura (1), Fumimaru KAWABA1A (1), Kenitiamano (1), Akio OHMORI (1), Mitsuhiro OKATSU (1), Kiyoshi UCHIDA (2), And Takumi ISHII (3)
- Plate and Shapes Lab., Technical Research Labs., Kawasaki Steel Corp.
- Technical Service Sec., Technical Control Dep., Mizushima Works, Kawasaki Steel Corp.
- Structure Research Labs., Construction Materials Center, Kawasaki Steel Corp.
International Symposium on Steel for Fabricates Structures, ASM Int., USA, Nov. 1999, pp.165-171