雷华阳 ,张雅杰 ,冯双喜 ,孙晓芳 ,郝 琪 ,蒋明镜
AuthorsHTML:雷华阳 ^{1, 2, 3}，张雅杰 ¹ ，冯双喜 ¹ ，孙晓芳 ¹ ，郝 琪 ¹ ，蒋明镜 ¹
AuthorsListE:Lei Huayang,Zhang Yajie,Feng Shuangxi,Sun Xiaofang,Hao Qi,Jiang Mingjing
AuthorsHTMLE:Lei Huayang^{1, 2, 3}，Zhang Yajie¹，Feng Shuangxi¹，Sun Xiaofang¹，Hao Qi¹，Jiang Mingjing¹
Unit:1. 天津大学建筑工程学院，天津 300354；
2. 天津市滨海土木工程结构与安全教育部重点实验室，天津 300354；
3. 中国地震局地震工程综合模拟与城乡抗震韧性重点实验室，天津 300354

Unit_EngLish:1. School of Civil Engineering，Tianjin University，Tianjin 300354，China；
2. Key Laboratory of Coast Civil Structure Safety of Ministry of Education，Tianjin University，Tianjin 300354，China；
3. Key Laboratory of Comprehensive Simulation of Engineering Earthquake and Urban-Rural Seismic Resilience， CEA，Tianjin 300354，China

Abstract_Chinese:通过一系列宏微观试验，系统地进行了软黏土在循环荷载作用下宏观累积塑性应变的变化规律研究，建立 了微观参数与宏观累积塑性应变的灰色关联度，明确其关联特征．研究表明：在循环荷载作用下，软黏土累积塑性 应变呈现明显的 3 个阶段特征．振动前期，由于颗粒破碎造成平均粒径呈下降趋势；平均孔径由 4.39 μm 下降至 3.05 μm．振动后期，颗粒定向性较好．通过灰色关联度理论发现，对软黏土累积塑性应变影响最显著的微观参数是 平均粒径、平均孔径和孔隙分维．利用回归分析方法建立了累积塑性应变与微观参数的关联特征．
Abstract_English:Through a series of macro-micro tests，the law of changes in the macroscopic cumulative plastic deforma\u0002tion of soft clay under cyclic loading is systematically studied. The grey correlation between microscopic parameters and macroscopic cumulative plastic deformation was established and its correlation characteristics have been clarified. Research shows that，under cyclic loading，the cumulative plastic deformation of soft clay has three distinct stages. In the initial stage of vibration，the average diameter of the particles showed a downward trend due to the breaking of the particles；the average pore diameter decreased from 4.39 μm to 3.05 μm. In the subsequent vibration period，the orientation of the particles is better. Based on the grey correlation theory，the most significant microparameters that affect the cumulative plastic deformation of soft clay are the average particle size，average pore diameter，and fractal dimension of the pores. The relationship between the cumulative plastic deformation and microscopic parameters was established through regression analysis.
Keyword_Chinese:软黏土；宏微观特性；微观参数；累积塑性应变；灰色关联分析
Keywords_English:soft clay；macro and micro characteristic；microscopic parameter；cumulative plastic deformation；grey relational analysis

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