摘要
考虑时间效应,基于断裂力学理论,建立了考虑时效的危岩稳定性计算方法。考虑危岩主控结构面贯通长度和断裂韧度两个变量的概率分布,引入非线性最优化计算方法建立了危岩稳定可靠性的优化计算方法。以万州太白岩59#危岩为例,分析了危岩可靠指标和危岩失稳概率随不同结构面贯通长度标准差、断裂韧度标准差和结构面倾角的变化规律。
Considered time effect,a calculate method for perilous rock stability reliability was established by fracture mechanics. Considered probability distribution of the length of perilous rock＇s dominant fissure and fracture toughness, introducing the method of nonlinear optimization, the perilous rock reliability calculate method was established. Taking NO. 59# perilous rock on Taibai mountain for example, the variation between reliability index and instability probability and the standard deviation of dominant fissure＇s transfixion part and fracture toughness and dominant fissure＇s dip was analyzed.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2013年第4期68-72,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(11272185
50678182)
重庆交通大学水利水运工程教育部重点实验室开放基金(SLK2009B04)
关键词
危岩
断裂力学
最优化
时效
稳定性
失稳概率
perilous rock fracture mechanics optimizatiom aging
stability instability probability
