Title: Coupling model based on grey relational analysis and stepwise discriminant analysis for subsidence discrimination of foundation in soft clay areas

Authors: Bo Li; Nian Liu; Wei Wang

Addresses: Institute of Foundation Engineering, China Academy of Building Research Co., Ltd, Beijing 100013, China; National Engineering Research Center of Building Technology, Beijing 100013, China ' Institute of Foundation Engineering, China Academy of Building Research Co., Ltd, Beijing 100013, China; National Engineering Research Center of Building Technology, Beijing 100013, China ' Institute of Earthquake Resistance and Disaster Reduction, Beijing University of Technology, Beijing 100124, China

Abstract: We selected grey correlation and stepwise discriminant analyses as basic models, proposed a coupling discrimination method, and designed and established a coupling discriminant model of the foundation subsidence in soft soil areas to address the challenges in the discriminant analysis of the seismic subsidence grade of soft soil. In this model, samples for discrimination and reference samples were first analysed by indicator relations analysis. Seismic subsidence grades were ranked according to the correlation, and discriminant grades were screened. Finally, the seismic subsidence grades of the samples that met the criteria were confirmed with stepwise discriminant analysis. Actual sample data were calculated, and the discriminant results were compared and analysed with the traditional model to verify the applicability and accuracy of the coupling model. We obtained good evaluation results, which provided a new method for discriminant analysis of soft soil seismic subsidence grades.

Keywords: soft clay; grey relational analysis; GRA; stepwise discriminant analysis; SDA; coupling model.

DOI: 10.1504/IJCSE.2021.113648

International Journal of Computational Science and Engineering, 2021 Vol.24 No.1, pp.55 - 63

Received: 02 Apr 2020
Accepted: 14 Jul 2020
Published online: 15 Mar 2021 *

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