论文部分内容阅读
文章强调了双控技术在预应力钢筋张拉中的应用优势,并介绍了预应力张拉双控的目的。提出了双控技术中预应力钢筋理论伸长值的计算方法,并通过实例将该方法计算的理论值和实测值进行了对比分析,发现张拉应力和伸长量校核双控的方法,可以综合反映张拉应力是否足够,孔道摩阻损失是否偏大,以及预应力筋是否有异常现象。
The paper emphasizes the application of dual control technology in the prestressing of steel bars and introduces the purpose of prestressing double control. The calculation method of the theoretical elongation value of prestressing steel in double control technology is put forward. By comparing the calculated theoretical value and measured value by examples, it is found that the double-control method of checking tensile stress and elongation can Comprehensively reflect whether the tensile stress is sufficient, the pore friction loss is too large, and prestressed tendons whether there is an abnormal phenomenon.