基于非对称联系云的膨胀土和改良土胀缩性评价

发布时间：2018-03-21 19:01

本文选题：膨胀土　切入点：胀缩性　出处：《应用基础与工程科学学报》2017年01期 　论文类型：期刊论文

【摘要】：膨胀土胀缩性评价指标常为有限区间内多种类型的不确定性指标,为真实反映指标的非对称分布特点和考虑胀缩等级模糊随机特性及定量评价结果的转换态势,将集对论和云模型耦合提出能模拟有限区间数据的非对称联系云模型,即基于指标分类标准确定各胀缩等级的左、右半区间长度和求解相应的非对称联系云数字特征,并生成有限区间内的非对称联系云,实现统一描述膨胀土和改良土胀缩性评价指标的确定和不确定性,进而结合指标权重综合分析样本与胀缩等级间的联系和等级特征值,以确定样本的胀缩性等级.实例应用及与传统正态云和模糊方法等结果的对比结果表明,该模型应用于膨胀土和改良土胀缩性分类是有效可行的,克服了传统云模型局限应用于正态分布指标缺陷,且能辩证分析评价指标的动态不确定性.
[Abstract]:The evaluation index of swelling and shrinkage of expansive soil is usually a variety of uncertain indexes in a limited interval, which is a true reflection of the asymmetric distribution of the index, the fuzzy random characteristic of considering the expansion and shrinkage grade and the changing situation of the quantitative evaluation results. By coupling set pair theory with cloud model, an asymmetric associated cloud model which can simulate finite interval data is proposed, that is, the left and right half interval length of each expansion and contraction grade is determined based on index classification criteria, and the corresponding asymmetric associated cloud numerical characteristics are solved. The asymmetric connection cloud is generated in the finite interval to realize the unified description of the determination and uncertainty of the swelling and shrinkage evaluation indexes of expansive soil and improved soil. Furthermore, the relationship between the sample and the expansion and shrinkage grade and the grade characteristic value are analyzed synthetically with the index weight. In order to determine the degree of dilatancy and shrinkage of the sample, the application of the model to the classification of dilatancy and shrinkage of expansive soil and improved soil is proved to be effective and feasible, and the comparison with the results of the traditional normal cloud and fuzzy method shows that the proposed model is effective and feasible in the classification of dilatancy and shrinkage. It overcomes the limitation of traditional cloud model in normal distribution index and can analyze the dynamic uncertainty of evaluation index dialectically.
【作者单位】：合肥工业大学土木与水利工程学院;
【基金】：国家自然科学基金项目(41172274,51579059)
【分类号】：TU443

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