摘要
岩土工程中的各种信息普遍存在着随机性、模糊性、灰性及未确知性等不确定性,由于实际情况的复杂和试验资料的不足,计算参数往往是多种不确定性的混合体。针对这一特点,利用盲数来表达计算参数的不确定性,将盲信息的数学理论引入到边坡稳定的刚体极限平衡计算方法中,提出了一种安全系数计算的新方法。运用盲数运算法则计算出安全系数在不同的取值区间内的可信度,从而为判断边坡的稳定状态提供了更全面的依据,克服了传统方法描述过于绝对化的问题。实例研究表明,盲数在边坡稳定分析中能更好地考虑参数的不确定性情况,得到的结果更可靠,有较好的实用价值。
Uncertainty information such as random, fuzzy, gray, unsure message widely exists in the geotechnical engineering. Due to the complexity of the practical situation and deficiency of experiment data, calculation parameters are usually the mixture of multi uncertainty. Against this character, using the blind data to express the uncertainty of the calculation parameters, the theory of blind information is applied to the rigid limiting equilibrium method for slope stability; and a new method of computing safety factor is put forward. The corresponding confidence level of safety factor in different numerical value intervals is computed by use of blind data algorithms; consequently the more comprehensive result is provided to judge the stability state of slope, overcoming the defect of absolutely definitive description in the traditional methods. The case study indicates that the blind data can consider the practical situation better in the slope stability analysis; and the result is more detailed and reliable, having good practical values.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第11期2401-2404,共4页
Rock and Soil Mechanics
基金
国家自然科学基金项目(No.50539110)资助课题
关键词
不确定性
盲数
边坡稳定
安全系数
uncertainty
blind data
slope stability
safety factor
