LOW CYCLE FATIGUE CHARACTERISTICS OF BRIDGE DECK RC SLABS UNDER THE REPETITION OF WHEEL LOADS

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  • 輪荷重の反復作用下での道路橋RC床版の低サイクル疲労特性
  • リンカジュウ ノ ハンプク サヨウカ デ ノ ドウロキョウ RC ショウバン

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Abstract

A total of 47 model slabs whose scale was about 1/3 to a typical deck panel between adjacent main girders of an existing steel-concrete composite girder bridge were tested under the repetition of a wheel load using a wheel tracking machine originally developed by Osaka City University. The tests were confined with a low cycle fatigue range in which the repetition of a wheel load was less than 2×104 times. The numerous data obtained in the tests are used to reveal the low cycle fatigue characteristics of bridge deck RC slabs. Besides, assuming that such characteristics may also significantly control the high cycle characteristics of the slabs, a method for estimating fatigue strength and fatigue life of bridge deck RC slabs is proposed.

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