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一、概况日本国铁在研究混凝土桥向长大化方向发展时,使用了设计标准强度σ_(CK)=800公斤/厘米~2的高强度混凝土。为了在实桥上应用高强度混凝土,选择了以预应力混凝土铁路桁架桥为研究项目。
I. Overview Japan’s National Railways in the study of the direction of the growth of the concrete bridge to the development, the use of the design standard strength σ_ (CK) = 800 kg / cm ~ 2 high-strength concrete. In order to apply high-strength concrete on the actual bridge, the prestressed concrete railway truss bridge was selected as the research project.