论文部分内容阅读
大桥钢梁跨度的长短标志着一个国家工业水平、冶金水平的高低。50年代,武汉长江大桥最大跨度为128米。当时我国没有高强度的钢材,还是从前苏联引进最好的钢材三号碳钢。到了60年代,南京长江大桥使用了我国自己生产的16锰桥梁钢,跨度增大到186米。而九江长江大桥采用的是鞍钢生产的15锰钒氮钢。这种钢材比16锰钢重量轻20%,强度大15%,从而使九江长江大桥的跨度一下
Bridge span length of steel beam marks a country's industrial level, the level of metallurgy. 50's, Wuhan Yangtze River Bridge, the maximum span of 128 meters. At that time our country did not have high-strength steel, or the Soviet Union to introduce the best steel on the 3rd carbon steel. By the 1960s, the Nanjing Yangtze River Bridge used 16 manganese bridge steel produced by China itself, increasing its span to 186 meters. The Jiujiang Yangtze River Bridge is Anshan Iron and Steel production of 15 manganese vanadium nitrogen steel. This steel than the 16 manganese steel weight 20% lighter, 15% greater strength, so that the Jiujiang Yangtze River Bridge span