Undrained Responses of Partially Saturated Sand Induced by Biogas under Dynamic Cyclic Loading

doi:10.1520/JTE20190841

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	Undrained Responses of Partially Saturated Sand Induced by Biogas under Dynamic Cyclic Loading
	Peng, Erxing 1; Sheng, Yu 1; Hu, Xiaoying 2; Zhang, Dingwen 3
刊名	JOURNAL OF TESTING AND EVALUATION
	2021-01
卷号	49 期号:1 页码:15-27
关键词	LIQUEFACTION RESPONSE EARTHQUAKE MITIGATION CARBONATE STRENGTH MODEL
ISSN号	0090-3973
DOI	10.1520/JTE20190841
英文摘要	Desaturation denotes a methodology used to mitigate sand liquefaction. Signifying a new form of material, biogas is deemed more feasible for the purpose of desaturation. The present study entailed the adoption of a microbial denitrification process for generating nitrogen gas to induce specimens that are partially saturated. These specimens were utilized for the consolidated undrained triaxial tests performed isotropically. Based on a simplified process concerning the evaluation of liquefaction, the study provided the crucial degree of saturation for determining its minimum degree for averting liquefaction under varying intensities of earthquake. According to test findings, the soils' liquification resistance grows with an increase in the saturation degree. The number of loading cycles used for initializing liquefaction increases to 34 cycles from 18 cycles under undrained asymmetricity as the extent of saturation reduces to 95.9 % from 100 % when the similarity of stress ratio is observed. Furthermore, the ratio of liquification resistance goes up in a linear pattern initially as the degree of saturation decreases. Meanwhile the ratio declines as the relationship becomes increasingly nonlinear. As a result, there is a gradual reduction in liquefaction resistance as the magnitude of earthquake rises, with a decline in the critical saturation degree. Notably, the extent of this decline is predicated on the relative density.
WOS研究方向	Materials Science
语种	英语
出版者	AMER SOC TESTING MATERIALS
WOS记录号	WOS:000599154100002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147372]
专题	兰州理工大学
通讯作者	Peng, Erxing
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Donggang W Rd 320, Lanzhou 730000, Gansu, Peoples R China; 2.Lanzhou Univ Technol, Sch Civil Egineering, 36 Pengjiaping Rd, Lanzhou 730050, Gansu, Peoples R China; 3.Southeast Univ, Sch Transportat, Nanjing 210096, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Peng, Erxing,Sheng, Yu,Hu, Xiaoying,et al. Undrained Responses of Partially Saturated Sand Induced by Biogas under Dynamic Cyclic Loading[J]. JOURNAL OF TESTING AND EVALUATION,2021,49(1):15-27.
APA	Peng, Erxing,Sheng, Yu,Hu, Xiaoying,&Zhang, Dingwen.(2021).Undrained Responses of Partially Saturated Sand Induced by Biogas under Dynamic Cyclic Loading.JOURNAL OF TESTING AND EVALUATION,49(1),15-27.
MLA	Peng, Erxing,et al."Undrained Responses of Partially Saturated Sand Induced by Biogas under Dynamic Cyclic Loading".JOURNAL OF TESTING AND EVALUATION 49.1(2021):15-27.