Mechanical model of chlorine salinized soil-steel block interface based on freezing and thawing

doi:10.16285/j.rsm.2018.1737

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Mechanical model of chlorine salinized soil-steel block interface based on freezing and thawing
	Chou, Ya-Ling 1,2; Huang, Shou-Yang 1,2; Sun, Li-Yuan 1,2; Wang, Li-Jie 1,2; Yue, Guo-Dong 1,2; Cao, Wei 3; Sheng, Yu 3
刊名	Yantu Lixue/Rock and Soil Mechanics
	2019-07-10
卷号	40 页码:41-52
关键词	Chlorine Chlorine compounds Freezing Internal friction Matrix algebra Mechanical properties Shear flow Shear stress Soils Thawing Weathering Freeze-thaw cycles Freezing and thawing cycle Freezing thawing cycles Internal friction angle Mechanical model Mechanical parameters Shear stress displacement Steel interfaces
ISSN号	10007598
DOI	10.16285/j.rsm.2018.1737
英文摘要	Freezing and thawing process, as a weathering process, is very common in the Northwest China. It repeatedly changes the microstructure and physical properties of the soil, and strongly affects the interaction between soil and structure. In view of the influence of freezing and thawing on the mechanical properties of salinized soil-structure contact surface, the shear tests under unconsolidated and undrained conditions were applied, considering the effects of freezing and thawing cycles, salt content, matrix suction and other factors on the mechanical properties of unsaturated chloride salinized soil-steel interfaces. The results showed that when the salt was not contained in the soil, the mechanical parameters (e.g. cohesion and internal friction angle) of the interface increased at first and then they decreased with the increase in the number of freezing-thawing cycles. When the salt was contained in the soil, the cohesion of the interface between the salinized soil and steel decreased, but the internal friction angle slightly increased with the increase in the number of freezing-thawing cycles. Before and after freezing and thawing, the mechanical parameters of the interface decreased at first and then increased with the increase in salt content, including threshold values of salt contents. Before the freezing-thawing process, the mechanical parameters of the interface have a salt threshold value of 8%. When the number of the freezing-thawing cycles increases, the threshold changes. The suction force of the matrix at the interface generally decreased with the increase in cycles of freezing-thawing process and it eventually stabilized. It firstly decreased and then increased with the increase in the salt content. The salt threshold of matrix suction is approximately 10%. The shear stress-shear displacement of the interface presented two stages including the linear elastic deformation and strengthening stages. When the vertical load is small, the shear stress-displacement curves show weak hardening characteristics, and no obvious strain-softening phenomenon occurs.Therefore the applicability of the shear stress-shear displacement modes at the interface were evaluated and it is found that the Gongpaz model can be well matched with the experimental results. Thus the mechanical model of chlorine salinized soil-steel block interface was established and its reliability was also verified by the experimental data. © 2019, Science Press. All right reserved.
WOS研究方向	Engineering
语种	中文
出版者	Academia Sinica
WOS记录号	WOS:000512656400005
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114265]
专题	土木工程学院法学院
作者单位	1.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 2.Northwest Center for Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 3.State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou; Gansu; 730000, China
推荐引用方式 GB/T 7714	Chou, Ya-Ling,Huang, Shou-Yang,Sun, Li-Yuan,et al. Mechanical model of chlorine salinized soil-steel block interface based on freezing and thawing[J]. Yantu Lixue/Rock and Soil Mechanics,2019,40:41-52.
APA	Chou, Ya-Ling.,Huang, Shou-Yang.,Sun, Li-Yuan.,Wang, Li-Jie.,Yue, Guo-Dong.,...&Sheng, Yu.(2019).Mechanical model of chlorine salinized soil-steel block interface based on freezing and thawing.Yantu Lixue/Rock and Soil Mechanics,40,41-52.
MLA	Chou, Ya-Ling,et al."Mechanical model of chlorine salinized soil-steel block interface based on freezing and thawing".Yantu Lixue/Rock and Soil Mechanics 40(2019):41-52.