最后讨论了摩阻系数对张拉控制应力的影响，提出现场测试的一般性原则和要求。
Finally, the influence of frictional resistance factors on the controlled tensioned stress is discussed and the general principle and requirements of field measurement are presented.
采取应力控制，伸长校核的原则，确保了预应力张拉施工的质量。
Thequality of prestressed stretching is guaranteed by the principle of stress control and stretch adjusting.
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