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预应力混凝土梁中,有哪些与钢筋混凝土梁内不同类型的钢筋?作用如何?

问答题
2022-01-18 16:52
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正确答案

钢绞线,具有达到有热处理与预拉处理的效果,不仅可以消除内应力,而且可以提高强度,使结构紧密,切断后不松散,可使应力松弛损失率大大降低,伸直好。高强度钢丝,采用冷拔工艺生产的高强钢丝,冷拔后还需经过回火以消除钢丝在冷拔中所存在的内部应力,提高钢丝的比列极限、屈服强度和弹性模量。精轧螺纹钢筋,在轧制时沿钢筋纵向全部轧有规律性的螺纹肋条,可用螺丝套筒连接和螺帽锚固,因此不需要再加工螺丝,也不需要焊接。


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