CRITICAL TEMPERATURE OF STEEL BEAMS ON THE BASIS OF A LOAD-BEARING FIRE TEST OF 2-STOREY RIGID STEEL FRAME

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  • HIRASHIMA Takeo
    Assoc. Prof., Graduate School of Engineering, Chiba Univ., Dr. Eng.
  • OKUWAKI Kazuma
    Kajima Corporation, M. Eng.
  • ZHAO Xuansu
    Graduate Student, School of Engineering, The University of Tokyo
  • SAGAMI Yuki
    Fire Engineering Lab., General Building Research Corporation
  • TOYODA Koji
    Fire Engineering Lab., General Building Research Corporation, Dr. Eng.

Bibliographic Information

Other Title
  • ２層剛接鋼骨組の載荷加熱実験による鋼梁の崩壊温度
  • 2層剛接鋼骨組の載荷加熱実験による鋼梁の崩壊温度 : 鋼骨組の火災時変形挙動に関する研究(その1)
  • 2ソウゴウセツコウ ホネグミ ノ サイカ カネツ ジッケン ニ ヨル コウリョウ ノ ホウカイ オンド : コウ ホネグミ ノ カサイジ ヘンケイ キョドウ ニ カンスル ケンキュウ(ソノ 1)
  • Deformation behaviour of steel frames in fire　Part 1
  • －鋼骨組の火災時変形挙動 に関する研究　その1－

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Abstract

This paper discusses, on the basis of experimental results, structural fire behaviour of a rigid steel frame with fully-moment-resisting beam-to-beam connections with splice plates and high strength bolts, and beam-to-column connections with full penetration welds. The test results indicated that the moment-resisting connections in the rigid steel frame have sufficient load-carrying capacity, but failure may occur in the connected beam due to inadequate shear resistance of the beam web in fire. The critical temperature of the steel beam could be approximated on the basis of its inherent resistance at elevated temperature and initial effects, because the thermal stress disappeared at the fire limit stage. In this study, the safety factor of structural fire safety design was also discussed on the basis of the result of these load-bearing fire tests.

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