Analysis of strength and toughness matching status of welded joints of steel bridges

The domestic steel bridge welded joint strength and toughness matching is reviewed.Steel plate and welding material test data show that:the range of raw materials fluctuation strength is large,bringing greater difficulties to strength match.Therefore,limitations on strength range is needed in raw material standerds;In some programs,the weld seam strength limitation index lack of theoretical basis.There is a need for thematic research to develop a reasonable range of fluctuations based on each cases.