Loading rate effect, creep and stressrelaxation should be attributed to the viscous properties of the sand specimens, but not to the delayed dissipation of excess pore water pressure.
加载速率效应、蠕变以及应力松弛都是砂土材料本身黏性的反映,而与超孔隙水压力的消散无关。
2
To select different initiative stress can get different relaxationrate of prestressed steel strand and find out the relation between initiative stress and relaxationrate.
对预应力钢绞线选用不同的初始应力,得到不同的松弛率,从而找出初始应力与松弛率的关系。
3
Conclusion the rate of stressrelaxation of the rubber ring ligatures on different loads are the same.