Improvement methods of plastic deformation capacity of pre-built-up H-shaped beam

Abstract

In this paper, the improvement methods of plastic deformation capacity of pre-built-up H-shaped beam by submerged arc welding were investigated. First, a survey of improvement methods for the beam end connection of existing steel structure buildings was conducted. Next, the improvement effect about slit, boxing welding, backfill welding and web stiffener were investigated by the loading test. From test results, it becomes clear that the plastic deformation capacity of the beam increases by slit, backfill welding and web stiffener.