摘要
对于重力坝双斜面深层抗滑稳定,采用一次二阶矩法和等效线性化计算了滑动体、抗力体及体系的抗滑稳定可靠指标;赋予安全系数广义的含义,采用蒙特卡罗法计算重力坝双斜面深层抗滑稳定的体系可靠指标,并与一次二阶矩法和等效线性化计算的体系可靠指标作了比较,探讨了可靠度分析法与安全系数设计法之间的联系。结果表明,安全系数设计法中,一个粗略的安全系数不能真实、准确地反映重力坝深层抗滑稳定的安全度水平,建议结合可靠度分析法和安全系数设计法,在安全系数设计法中引入分项系数,采用广义的安全系数,可供重力坝设计规范修订时参考。
With regard to the wedge stability against deep sliding of gravity dams, the reliability indexes of sliding body, resistant body and the system are calculated by means of first-order second-moment method and equivalent linearization method. The tradition- al safety factor is endowed with general meaning, and the system reliability index is calculated using the method of Monte Carlo. The relationship between reliability theory and safety factor method is discussed. The results show that the single safety factor can not completely reflect the safety level of stability against deep sliding of gravity dams. It is suggested that with the combination of relia- bility theory and safety factor method, the partial factor should be introduced into the safety factor method and the general safety fac- tor can be used in designing, which serves as a reference for the revision of Design specification for Concrete Gravity Dams.
出处
《中国农村水利水电》
北大核心
2013年第4期91-94,共4页
China Rural Water and Hydropower
关键词
水工结构
重力坝
深层抗滑稳定
体系可靠度
hydraulic structure
gravity dam
anti-sliding stability
system reliability
