Fuzzy-random reliability analysis of slope stability
Article Text (Baidu Translation)
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摘要: 考虑可靠性分析中结构极限状态变量在零值附近的模糊区间, 建立边坡稳定性模糊随机可靠度分析模型。研究了在土性参数变异性、模糊失效概率隶属度函数梯形与岭形分布类型情况下, 模糊区间宽率与偏度对模糊可靠指标的影响。分析结果显示: 偏度与可靠性指标曲线的斜率随宽率的减小而减小, 且其趋势与参数变异性与模糊失效概率隶属度函数类型无关; 对于宽率的某一确定值而言, 偏度的增大会导致模糊可靠指标的降低; 土性参数变异性的增加会导致模糊可靠指标的降低。Abstract: The fuzzy interval of limit state variable near its zero value was considered, ana a moael of fuzzy-random reliability analysis of slope stability was put forward. The influences of width fraction and migration fraction on the fuzzy reliability index of slope stability were studied in different situations including the variability of common soil parameters and the membership function distribution of fuzzy failure probability. Analysis result indicates that the slope of migration fraction and fuzzy reliability index curve decreases with the decrease of width fraction, which is irrelated to the variability and the distribution. For a certainty value of width fraction, the fuzzy reliability index decreases with the increase of migration fraction. The increase of the variability of soil parameters results in the decrease of the index. 3 tabs, 4 figs, 7 refs.
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Key words:
- slop /
- parameter variability /
- fuzzy-random reliability /
- reliability index
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表 1 变异系数取值范围
Table 1. Ranges of variation factors
表 2 例1计算结果
Table 2. Calculation result of example 1
表 3 例2计算结果
Table 3. Calculation result of example 2
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[1] 何满潮, 苏永华, 景海河. 块状岩体的稳定可靠性分析模型及其应用[J]. 岩石力学与工程学报, 2002, 21(3): 343-348. doi: 10.3321/j.issn:1000-6915.2002.03.010HE Man-chao, SU Yong-hua, JING Hai-he. Reliability analysis model of blocky rockmass stability and its application[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(3): 343-348. (in Chinese) doi: 10.3321/j.issn:1000-6915.2002.03.010 [2] 康海贵, 李炜. 边坡稳定安全系数及其与土性参数及失效概率关系研究[J]. 大连理工大学学报, 2008, 48(6): 856-862. https://www.cnki.com.cn/Article/CJFDTOTAL-DLLG200806015.htmKANG Hai-gui, LI Wei. Research on slope safety factor and its relationship with shear strength parameters and failure probability[J]. Journal of Dalian University of Technology, 2008, 48(6): 856-862. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DLLG200806015.htm [3] 佟晓利, 赵国藩. 一种与结构可靠度分析几何法相结合的响应面方法[J]. 土木工程学报, 1997, 30(4): 51-57. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC199704006.htmTONG Xiao-li, ZHAO Guo-fan. The response surface method in conjunction with geometric method in structural reliability analysis[J]. China Civil Engineering Journal, 1997, 30(4): 51-57. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC199704006.htm [4] 武清玺, 卓家寿. 结构可靠度分析的变f序列响应面法及其应用[J]. 河海大学学报, 2001, 29(2): 75-78. https://www.cnki.com.cn/Article/CJFDTOTAL-HHDX200102016.htmWU Qing-xi, ZHUO Jia-tao. A sequential response surface method with various f and its application to structural reliability analysis[J]. Journal of Hohai University, 2001, 29(2): 75-78. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HHDX200102016.htm [5] 韩玉芳, 刘德辅, 董胜. 边坡整体稳定的可靠性分析方法[J]. 海岸工程, 2001, 20(4): 7-14. https://www.cnki.com.cn/Article/CJFDTOTAL-HAGC200104001.htmHAN Yu-fang, LIU De-fu, DONG Sheng. Reliability analysis method of slope stability[J]. Coastal Engineering, 2001, 20(4): 7-14. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HAGC200104001.htm [6] HUSEIN MALKAWI A I, HASSAN W F, ABDULLA F A. Uncertainty and reliability analysis applied to slope stability[J]. Structural Safety, 2000, 22(2): 161-187. [7] 康海贵, 李炜. 基于安全系数解析式的边坡稳定评价体系研究[J]. 中国公路学报, 2008, 21(3): 1-5. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200803002.htmKANG Hai-gui, LI Wei. Research on evaluated system for slope reliability based on calculation formulae of safety factor[J]. China Journal of Highway and Transport, 2008, 21(3): 1-5. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGGL200803002.htm -
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