摘要:
我国钢筋种类繁多,强度偏低,部分钢筋延性太差,已难以适应混凝土结构发展的需要。基于混凝土结构对受力钢筋的要求,从强度、延性、质量稳定性、锚固性能、施工适应性及经济等方面对现有钢筋进行了分析比较。根据我国国情及建筑市场的变化,提出了大力推广Ⅲ级钢筋及中高强钢丝钢绞线,发展小直径Ⅱ、Ⅲ级钢筋,优化或淘汰冷加工钢筋,发展与钢筋有关的配套技术等建议。
Abstract:
The reinforced bars in China are characterized by a great variety,lower Strength,bad ductility of some reinforced bars.Therefore,the reinforced bars made in China are difficult to suit the needs of development of concrete structure.Based on the requirement of the concrete structure in the properties of the stressed reinforced bar,the existing reinforced bars are analyzed and compared in respect of strength,ductility,quality stability,anchorage property,constructure adaptibility and economics etc.On the basis of a national conditions and changes of constructure market,a series of proposals were put forward,such as spreading Ⅲ-grade reinforced bar,middle-high strength steel wire and stranded wire,development of Ⅱ,Ⅲ-grade small diameter reinforced bars,optimization or elimination of cold working reinforced bar and development of the technology concerning reinforced bar etc..
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