Effects of Heat Softening on Initiation of Landslides

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	Effects of Heat Softening on Initiation of Landslides
	Xiong CX; Lu XB(鲁晓兵); Huang WD; Wang, CH; Xiong, CX (reprint author), Fuzhou Univ, Sch Environm & Resources, Fuzhou 350108, Peoples R China.
发表期刊	JOURNAL OF MOUNTAIN SCIENCE
	2014-11
卷号	11 期号:6 页码:1571-1578
ISSN	1672-6316
摘要	Effects of heat softening on the initiation of slide surface (shear banding) in clayey slopes during fast deformation were discussed. Controlling equations considering heat, pore pressure and mechanical movement were presented. By perturbation method, the instability condition of localized zone (i.e. criterion for initiation of shear banding) for thermal related soils, such as clayey slope, was obtained. It is shown that slide surface initiates once the thermal-softening effects overcome the strain-hardening effects whether it is adiabatic or not. Without strain hardening effects, strain rate hardening obviously plays a role in initiation of shear band. During initiating process, heat is trapped inside the shear band, which leads rapidly to a pore pressure increase and fast loss of strength. The localized shear strain is concentrated in a narrow zone with a width of several centimeters at most and increases fast. This zone forms the sliding surface. Temperature can increase more than 2 degrees C, pore pressure can increase 160% in about 0.1s inside this zone. These changes cause the fast decrease in friction-coefficient by about 36% over the initial value. That is how shear band initiated and developed in clayey slopes.
关键词	Landslide Thermo-effect Slide Surface Initiation
学科领域	Environmental Sciences & Ecology
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000345621100019
项目资助者	This study was funded by the National Natural Science Foundation of China (Grant No. 11272314; No. 51239010), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20133514110004), and the Research Project of Chinese Ministry of Transport (Grant No. 201331849A130).
课题组名称	LMFS海洋土力学(LHO)
论文分区	Q4
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/49443
专题	流固耦合系统力学重点实验室
通讯作者	Xiong, CX (reprint author), Fuzhou Univ, Sch Environm & Resources, Fuzhou 350108, Peoples R China.
推荐引用方式 GB/T 7714	Xiong CX,Lu XB,Huang WD,et al. Effects of Heat Softening on Initiation of Landslides[J]. JOURNAL OF MOUNTAIN SCIENCE,2014,11,6,:1571-1578.
APA	Xiong CX,鲁晓兵,Huang WD,Wang, CH,&Xiong, CX .(2014).Effects of Heat Softening on Initiation of Landslides.JOURNAL OF MOUNTAIN SCIENCE,11(6),1571-1578.
MLA	Xiong CX,et al."Effects of Heat Softening on Initiation of Landslides".JOURNAL OF MOUNTAIN SCIENCE 11.6(2014):1571-1578.

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