With the time being separated into some periods, the prestressing loss in each period due to shrink, creep and relaxation is calculated, and then the total loss obtained.

该法把时间分割为若干时间段，求解各段因收缩、徐变和松弛引起的预应力损失，并叠加求总损失。

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This paper gives an account of the experimental study on the stress relaxation in low relaxation prestressing wires. The influence of the initial stress and the duration of loading is discussed.

报道了对我国低松弛预应力钢丝所进行的试验研究，包括不同初始应力、时间对松弛的影响。

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The selection of bonded prestressing tendon and unbonded prestressing tendon, low-relaxation strand and stress-relieved strand in the design are also discussed.

并对设计中有关有粘结预应力筋与无粘结预应力筋，低松弛钢绞线与普通松弛钢绞线的选择应用作了讨论。

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