| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.24 ( April 1991 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Elastic-Plastic Behavior of Beam-to-Column Connection of High-Strength and Low-Yield Ratio Steel for Building Use Masamitsu Nagayasu, Hirokazu Yasuda, Shin-ichi Deshimaru, Hiroshi Hujino, Kiyoshi Uchida |
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Synopsis : Mechanical properties of the base metal and welded joints as well as low cycle fatigue strength of the beam-to-column connection using low YR (yield ratio) 53 and 60kgf/mm2 steel plates, which have been newly developed for building use, have been investigated. The flexual strength of the beam-to-column connection in full-scale using the materials mentioned above also has been examined. Each steel plate has been demonstrated to be safe and reliable when applied to the steel structure. The principal results obtained are as follows: (1) Steel plates with low YR 53 kgf/mm2 produced by TMCP and 60 kgf/mm2 produced by ferrite and austenite dual-phase region quenching meet aimed properties and have good anti-cracking characteristics. (2) Tensile strength and toughness of the joint are satisfactory, although HAZ softening occurs at welding with a large heat input. (3) Fatigue strength of the beam-to-column connection against the severe earthquake is sufficient. (4) Flexural strength and deformability of the beam-to-column connection with 60 kgf/mm2 steel plates are superior, and improved owing to its low YR. |
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