The global stability criterion of cavern group is established based on the K-?E relation, where K is the strengthreductionfactor and ?
E关系曲线的库群整体稳定性和破坏的关键判据，其中，K为强度折减系数，?。
2
The factor of life scatter is used for depicting the dispersibility of fatigue strength in low cycle fatigue, but in high cycle fatigue is the fatigue strengthreductionfactor.
低周疲劳常采用寿命分散系数描述结构疲劳强度的固有分散性，而高周疲劳采用疲劳强度减缩系数来描述。
3
Finally, based on theoretical analysis, numerical simulation and test verification, the strengthreductionfactor and the calculation expression of normal section bearing capacity of CFRP are given.