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一、前言箱形梁的横隔板与下盖板连接处本应焊接起来,以保持其截面几何不变性。但是,在箱体几何尺寸较小的情况下无法焊接,而且过去都认为,梁的受拉区的横向焊缝对于疲劳非常敏感,因而会使这一区域容易产生疲劳损坏。
I. INTRODUCTION The connection between the diaphragm and the lower cover of the box girder should be welded to keep the geometric stability of the cross section. However, welding can not be done with small box geometries and it has been thought in the past that transverse welds in the tension zone of the beam are very fatigue-sensitive and therefore fatigue-prone in this area.