A STUDY OF AFTER-FRACTURE REDUNDANCY FOR TWO-GIRDER BRIDGES

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  • 主桁損傷を受けた2主桁橋の残存耐力に関する考察
  • シュゲタ ソンショウ オ ウケタ 2 シュゲタバシ ノ ザンソン タイリョク ニ カンスル コウサツ

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Abstract

Due to the structural features, two-girder bridges are considered to be at a higher risk to collapse if one of the main girders is damaged. However, it is hard to conclude that two-girder bridges with high stiffness P. C. (Pre-stressed Concrete) deck slabs do not possess redundant strength even after the damage is observed on the main girder. To understand the collapse mechanism and to assess the response behavior of the structure after damage was introduced, loading tests were conducted on the 1:2 scale model with the fractured main girder. Test results were utilized to assess the collapse mechanism and safety of two girder bridges was also evaluated by analyzing the data with the finite element method (F. E. M.)

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