Mechanical behaviors and axial stress evaluation of aging pratt truss bridge based on the field loading test

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  • 実橋載荷実験による高齢化したプラットトラス橋の軸応力評価と力学挙動
  • ジツバシサイカ ジッケン ニ ヨル コウレイカ シタ プラットトラスバシ ノ ジク オウリョク ヒョウカ ト リキガク キョドウ

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Abstract

<p>In this study, the corrosion damage investigation and field loading test of a pratt truss bridge which was constructed 97 years ago were carried out for clarifying the acting live-load stress of main structure members and deflection behaviors. The maximum reduction rate of cross-section area was confirmed in the joint part between sway bracing and the vertical member. From the consideration of current traffic restriction, 2 dump trucks with 80kN weight used as loading condition. As the test results, the acting compressive force of vertical member with severest corrosion damage was estimated about 1/3 of buckling load. Also, it could not confirm the serious effects due to corrosion damages and repairs to load bearing capacity under current traffic restriction.</p>

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