Thermodynamic-based cross-scale model for structural soil with emphasis on bond dissolution

doi:10.1139/cgj-2020-0677

	Thermodynamic-based cross-scale model for structural soil with emphasis on bond dissolution
	Zhang, Wei 3; Zou, Jia-qiang 3; Bian, Kang 2; Wu, Yang 1
刊名	CANADIAN GEOTECHNICAL JOURNAL
	2022
卷号	59 期号:1 页码:1-11
关键词	immersion weakening bond dissolution structural soil thermodynamics constitutive model
ISSN号	0008-3674
DOI	10.1139/cgj-2020-0677
英文摘要	The immersion weakening effect of natural soil has always been a difficult problem encountered in geotechnical engineering practice. The bond dissolution is a common cause of soil strength deterioration, which is not yet fully understood. In this study, a thermodynamic-based constitutive model of structural soils based on the a model is first established, considering the bond strength by modifying the yield surface size and gradually reducing the bond strength with the development of plastic strain. Furthermore, by taking the meso-mechanisms of bond dissolution into account, the evolution rule of the free energy during the bond dissolution process is derived based on a homogenization approach, and a thermodynamic-based constitutive model of structural soil with bond dissolution is thereafter developed. By comparing with the results of one-dimensional compression tests and conventional triaxial tests, the model is verified to be capable of reflecting the gradual destructuration process of soil while loading. The comparison with triaxial test results of completely decomposed granite after different immersion durations and parametric studies show that based on the cross-scale energy equivalence, the model can well reflect the strength deterioration characteristics of completely decomposed granite with bond dissolution mechanisms at the mesoscale fully considered.
资助项目	Natural Science Foundation of Guangdong Province[2018A030310346] ; Water Conservancy Science and Technology Innovation Project of Guangdong Province[2020-11] ; National Natural Science Foundation of China[51908153] ; National Key R&D Program of China[2016YFC0401802] ; Natural Science Foundation of Hubei Province[2018CFB632]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	CANADIAN SCIENCE PUBLISHING
WOS记录号	WOS:000740432500001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/30853]
专题	中科院武汉岩土力学所
通讯作者	Wu, Yang
作者单位	1.Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.South China Agr Univ, Coll Water Conservancy & Civil Engn, Guangzhou 510642, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Wei,Zou, Jia-qiang,Bian, Kang,et al. Thermodynamic-based cross-scale model for structural soil with emphasis on bond dissolution[J]. CANADIAN GEOTECHNICAL JOURNAL,2022,59(1):1-11.
APA	Zhang, Wei,Zou, Jia-qiang,Bian, Kang,&Wu, Yang.(2022).Thermodynamic-based cross-scale model for structural soil with emphasis on bond dissolution.CANADIAN GEOTECHNICAL JOURNAL,59(1),1-11.
MLA	Zhang, Wei,et al."Thermodynamic-based cross-scale model for structural soil with emphasis on bond dissolution".CANADIAN GEOTECHNICAL JOURNAL 59.1(2022):1-11.