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我国建筑结构和工程构筑物大多采用钢筋混凝土和预应力混凝土结构和构件,钢筋年用量约1300万吨。其中,用量最大的是Ⅰ级钢筋,其次是Ⅱ级钢筋。用Ⅰ、Ⅱ级钢筋配筋的普通钢筋混凝土结构是当今建筑结构的主体。预应力混凝土结构构件多数采用冷拔低碳钢丝或高
Most of China’s building structures and engineering structures use reinforced concrete and prestressed concrete structures and components. The annual amount of reinforcing steel is approximately 13 million tons. Among them, the largest amount is grade I steel, followed by grade II steel. Ordinary reinforced concrete structures reinforced with grades I and II are the main body of today’s building structures. Prestressed concrete structural members are mostly cold drawn low carbon steel wire or high