基于随机模糊理论的节理面抗剪强度参数的确定

›› 2016, Vol. 30 ›› Issue (3): 380-382.

基于随机模糊理论的节理面抗剪强度参数的确定

邹飞1,2,3，唐旭1,4，方正峰1,4

（1.贵州省交通规划勘察设计研究院股份有限公司，贵阳 550081； 2.中南大学土木工程学院，长沙 410075；
3.贵州省交通建设工程质量监督局，贵阳 550000； 4.贵州大学资源与环境工程学院，贵阳 550003）

收稿日期:2016-05-24 修回日期:2016-06-01 出版日期:2016-06-20 发布日期:2016-06-21
作者简介:邹飞（1983-），男，博士，高级工程师，研究方向为岩石动力学、边坡极限分析等。
基金资助:
基金项目：贵州省交通运输厅科技项目（No. 2015122046）

Determinations of Shear Strength Parameters of Jointed Rock with Fuzzy Random Theory

ZOU Fei1,2,3, TANG Xu1,4, FANG Zhengfeng1,4

(1.Guizhou Transportation Planning Survey & Design Institute Co., Ltd., Guiyang 550081;
2.School of Civil Engineering, Central South University, Changsha 410075;
3.Construction Engineering Quality Supervision Bureau of Guizhou Province, Guiyang 550000;
4.College of Resources and Environment Engineering, Guizhou University, Guiyang 550003)

Received:2016-05-24 Revised:2016-06-01 Online:2016-06-20 Published:2016-06-21

摘要/Abstract

摘要： 针对岩石抗剪强度参数c，φ的确定具有模糊性及随机性，首先，利用非对称三角模糊系数式表示参数c，φ最可能取值及其可能性分布，再通过非对称三角模糊数在特定截集水平下的宽度之和与测试值和计算分析最可能取值加权系数的方差作为目标函数进行模糊优化分析，同时通过“3σ”原则合理地确定非对称三角模糊数截集水平h，从而为岩土工程设计的优化提供了一种新的方法，该方法不仅可有效减少较大离散性数据对分析结果的影响，又真实地反映了实际工程中参数c，φ取值的不确定性特征。通过与最小二乘法的对比，表明该方法较符合工程实际。

关键词: 岩石抗剪强度, 非对称三角模糊数, 模糊性, 可能性分布区间

Abstract: The shear strength parameters of jointed rock mas have the characteristics of fuzziness and randomness. In this paper, the possible values and their distribution pattern can be represented by an asymmetric triangular fuzzy formula. The fuzzy optimization can be achieved by using the area of the triangular function under certain region and using the weighted average of het possible strength parameter values as the targeted function. The truncated set level h of the asymmetric triangular fuzzy number can be determined through 3 sigma method. This provides a new approach for the optimization of the geotechnical engineering projects. The least square linear regression analysis indicate that his method can be reasonably applied in the practical projects.

Key words: Jointed Rock Shear Strength, Asymmetric Triangular Fuzzy Numbers, Fuzziness, Possible Distribution Region

邹飞1,2,3，唐旭1,4，方正峰1,4. 基于随机模糊理论的节理面抗剪强度参数的确定[J]. , 2016, 30(3): 380-382.

ZOU Fei1,2,3, TANG Xu1,4, FANG Zhengfeng1,4. Determinations of Shear Strength Parameters of Jointed Rock with Fuzzy Random Theory[J]. , 2016, 30(3): 380-382.