FUNDAMENTAL STUDY ON LATERAL RESISTANCE CHARACTERISTICS OF SLEEPERS EQUIPPED WITH BUCKLING PREVENTION PLATES

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  • 座屈防止板付きまくらぎに対する道床横抵抗力特性の基礎的検討
  • ザクツボウシ イタツキマクラギ ニ タイスル ドウショウ オウ テイコウリョク トクセイ ノ キソテキ ケントウ

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 Various types of buckling prevention plates have been developed to increase lateral resistance of sleepers in ballasted tracks to reduce rail buckling potential. This study conducted scaled model tests to investigate effects of the plate size and the shape on the lateral resistance. It was found that the lateral resistance did not always increase with the increase of the plate area. The plate embedment depth significantly contributed the increase of the lateral resistance, while the plate width did not affect so much. This tendency was remarkably observed in single sleeper pull-out test results rather than track panel pull-out test results. The contribution of the plate width to the lateral resistance was relatively increased in the track panel pull-out tests. This was probably because the mobilized mechanisms for the sleeper side resistance in the tests were different from those in single sleeper pull-out tests. It was also found that the lateral resistance per one sleeper in the track panel pull-out tests was lower than that in the single sleeper pull-out tests. This was due to the effects of the piled group.

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