学术
摘 要:
根据岩土参数的区间性特点，引入区间分析方法，把岩土力学参数以及由此得到的响应量当作区间变量，建立基于区间分析的岩土结构稳定非概率可靠性分析模型．针对区间四则运算方法当输入变量的个数较多或输入变量的区间较宽时，常常会过宽地估算响应量变化区间，引入改进区间截断法对其进行求解，解决了区间运算结果扩张问题，在此基础上采用优化法解决了非概率可靠性指标的求解．将该方法应用于工程实例，分析结果表明了该方法的可行性．[著者文摘]
文章出处:
《湖南大学学报：自然科学版》-2008年35卷3期 -11-14页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-2472（2008）03-0011-04
Non-Probabilistic Reliability Research on Uncertain Parameters in Rock Mechanics
JIANG Chong, ZHAO Ming-hua, CAO Wen-gui （Institute of Geotechnical Engineering, Hunan Univ, Changsha, Hunan 410082, China）
Abstract:
According to the interval feature of geotechnical mechanic parameters, the interval analysis method was introduced, and a non-probabilistic reliability analysis model of rock and soil structural system based on the interval reliability analysis was constructed by describing uncertain geotechnical mechanic parameters and the sums of calculation as the interval variable. The interval calculation rules usually lead to interval expansion of the functional function, which is especially obvious when the interval variable is more or the range interval of the functional function is quite wide. So, the interval-truncation approach was introduced because it can avoid the interval expansion of the functional function. Then, based on this, the optimization methods for computing the non-probabilistic reliability index of rock and soil structures were used. And the computation and analysis of practical engineering indicate the method proposed is reasonable.[著者文摘]
Key words:
rock mechanics; reliability; uncertainty; interval analysis; non-probabilistic
基金资助:
国家自然科学基金资助项目（50578060）
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