预应力锚索差异分步张拉法钢绞线实测伸长量误差分析

Analysis on Measured Elongation Error of Steel Strand by Prestressed Anchor Cable Difference Step-by-step Stretching Method

多单元预应力锚索在张拉过程中,正式张拉前应进行预张拉。预张拉完成对钢绞线进行锁定,钢绞线锁定时由于预应力损失,会引起实测伸长量误差。该文就该误差的计算进行了阐述,并在实测伸长量剔除该误差值。

The multi-unit prestressed anchor cable must be pre-stretched before the formal stretching in its process. The completion of the pre-stretching locks the steel strand, which will cause the measured elongation error because of the prestressing loss. The article sets forth the calculation of this error, and eliminates this error value from the measured elongation.