DEFORMATION BEHAVIOUR OF FRICTION TYPE HIGH STRENGTH BOLTED JOINTS AT ELEVATED TEMPERATURE

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  • HIRASHIMA Takeo
    Assoc. Prof., Graduate School of Engineering, Chiba Univ., Dr. Eng.
  • ESAKI Yu
    Former Graduate Student, Chiba Univ., M. Eng.
  • ANDO Shuhei
    Graduate Student, Graduate School of Engineering, Chiba Univ.

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Other Title
  • 高温時における高力ボルト摩擦接合継手の変形性状
  • コウオンジ ニ オケル コウリョク ボルト マサツ セツゴウ ツギテ ノ ヘンケイ セイジョウ

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Abstract

In order to analyze the redundancy of steel frames in fire, it is important that the load-deformation behaviour of friction type high strength bolted joints at elevated temperature is clarified. In this paper, influences of plate thickness, end distance, fastening of bolts and steel temperature on the deformation behaviour of the bolted joints are discussed on the basis of the elevated temperature tensile test results. In case the plate is thin and the failure mode is tear-out, the ductility of the joints increases. However, if the failure mode is changed from tear-out to bolt in share due to increase of temperature or end distance, the ductility of the joints decreases. Fastening of bolts slightly affect the load-deformation behaviour of the bolted joints at elevated temperature.

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