考虑指标关联分析的软土地基震陷判别逐步判别模型  

Stepwise discriminant analysis for subsidence discrimination of foundation in soft clay area considering indicators relational analysis

作　　者：李波 崔金涛 刘念 苏经宇[3] 王威[3] Li Bo;Cui Jintao;Liu Nian;Su Jingyu;Wang Wei(Institute of Foundation Engineering, China Academy of Building Research, Beijing 100013, China;Jinan Urban and Rural Planning Research Center, Jinan 250099, China;College ofArchitecture and Urban Planning, Beijing University of Technology, Beijing 100124, China)

机构地区：[1]中国建筑科学研究院有限公司地基基础研究所,北京100013 [2]济南市城乡规划编制研究中心,山东济南250099 [3]北京工业大学建筑与城市规划学院,北京100124

出　　处：《建筑科学》2019年第7期30-36,共7页Building Science

基　　金：国家自然科学基金项目(51678017);中国建筑科学研究院有限公司青年科研基金(20181602331030010)

摘　　要：针对软土震陷危害等级判别中存在的问题,选取灰色关联方法和逐步判别方法作为基础模型,提出了一种耦合判别思路,并设计和建立了耦合式软土震陷判别模型。该模型首先对待判样本和参考样本进行指标关联分析;然后根据关联度将震陷等级排序,对参与判别的等级进行筛选;最后将符合条件的样本通过逐步判别分析确定最终震陷类型。为了验证耦合模型的适用性和准确性,对实际样本数据进行建模计算,并与传统模型的判别结果进行了对比分析,取得了较好的评价结果,为软土震陷等级判别提供了一种新的思路。Coupling model with a few parameters, which is based on grey relational method and stepwise discriminant method, is established to evaluate the regional foundation subsidence in soft soil area. Firstly, discriminant samples and reference samples are analyzed by indicators relations analysis. Secondly, the seismic subsidence grade is sorted according relevance, and the grade participating discriminant is screened. Finally, subsidence grade of eligible samples is determined by stepwise discriminant theory. The applicability and accuracy of the model are proved by instance analysis and the performance is compared with traditional model. The results show that the effect is good and this method provided a new way for evaluating the regional foundation settlement.

关 键 词：软土 灰色关联分析 逐步判别分析 耦合模型 

分 类 号：TU471.8[建筑科学—结构工程]