鉄骨柱仕ロスカラップの溶融亜鉛めっき割れに関する検討

摘要

The hot dip galvanizing for corrosion protection is often uesd for structural steel architecture in recent years. However, it is estimated to occur galvanizing crack at a intersection of many welding lines in column connection joints. In this study, galvanizing tests with partial column joint models and hot elasto-plastic FEM analysis were carried out in order to clarify mechanism of galvanizing crack. As a result, a dip speed is not so relative to galvanizing crack, neither is a presence of backing metal. It became also obvious that the higher a thickness ratio is, the higher a stress at the scallap is. We, furthermore, propose to reduce a thickness ratio and to put a hole in order to prevent galvanizing crack.