抄録
In order to examine or repair fatigue damaged steel bridges, it is necessary to obtain information of mechanical and chemical properties of steel of damaged members or joints. However, for the aging bridges, it is sometimes difficult to obtain such kinds of information from design articles. For such case, a sample material might be taken from the structures, but the sample should be as small as possible. This study examines the use of small steel pieces regarded as cores, which are taken from stop-holes or bolt-holes. Test specimens for Charpy impact test are made with small steel pieces by Electron Beam Weld (EBW) and the effect of the steel piece size and the other parameters on Charpy absorbed energy are examined.
