STRESS VARIATION AT THE END OF OUT-OF-PLANE GUSSET ON STEEL GIRDER WEB DUE TO MOVING LOAD

  • MORI Takeshi
    法政大学 都市環境デザイン工学科
  • MATSUI Yoshiaki
    法政大学大学院 デザイン工学研究科都市環境デザイン工学専攻[現 株式会社東京鐵骨橋梁]
  • HIRANO Shuichi
    土木研究所 構造物メンテナンス研究センター]
  • HARADA Hideaki
    土木研究所 構造物メンテナンス研究センター
  • MURAKOSHI Jun
    土木研究所 構造物メンテナンス研究センター[現 首都大学東京 大学院 都市環境科学研究科]

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Other Title
  • 移動荷重を受ける鋼I桁ウェブガセット溶接部の応力性状

Description

 The stress variation at the out-of-plane gusset welded joint on a steel I-section girder web has been examined when a load runs over the girder. This examination is essential in order to establish the fatigue strength evaluation method in the stress field where the direction of principal stress changes. For this purpose, stress measurement tests for the steel I-section girder specimen with out-of-plane gusset welded joints under the moving load, and finite element stress analyses for the specimen have been performed. The results indicate that the angle of shear stress and principal stress change with gentle slope due to the influence of vertical direction stress, the positions along weld toe in which the largest major principal stress occurs gradually changes by the load position, the stress at the welded joint located at the upper potion on the web is prone to be high compared with that at the lower position because of a difference of vertical stress magnitude.

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