抄録
When hot dip galvanizing treated steel structures, a sudden temperature change is given, and unsteady thermal stress occurs in a member between a part doing a dip earlier and parts doing a dip later, and there is the case that thermal strains and crack accidents. In this paper, steel plates were soaked in melted zinc to reproduce the state of the temperature distribution in the material that had a big influence on thermal strains etc., and the temperature distribution is measured. Moreover, the temperature distribution is estimated by using the optimization technique analyzing it for the relation between the heat diffusivity and the heat transfer coefficient and steels thickness.
