Seismic performance and failure mechanism of interbedded slopes with steep rock layers

Li, L; Ju, N; Sheng, D

Seismic performance and failure mechanism of interbedded slopes with steep rock layers

Li, L Ju, N Sheng, D

Permalink

Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Engineering Geology, 2023, 326, pp. 107312
Issue Date:: 2023-12-05

Closed Access

	Filename	Description	Size
	1-s2.0-S0013795223003307-main.pdf	Published version	12.72 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Li, L
dc.contributor.author	Ju, N
dc.contributor.author	Sheng, D https://orcid.org/0000-0002-1665-6931
dc.date.accessioned	2024-04-08T08:47:36Z
dc.date.available	2024-04-08T08:47:36Z
dc.date.issued	2023-12-05
dc.identifier.citation	Engineering Geology, 2023, 326, pp. 107312
dc.identifier.issn	0013-7952
dc.identifier.uri	http://hdl.handle.net/10453/177582
dc.description.abstract	Numerous interbedded rock (IR) slopes fail during the Wenchuan earthquake in the mountainous region of western China. Landslides are also triggered in IR slopes with a 60° layer inclination, which are generally stable in gravity-dominant environments. This study examines the effect of seismic motion on the response characteristics and failure patterns of IR slopes with steep layers to develop a landslide hazard assessment tool for earthquake-prone regions. First, we use a centrifuge shaking table test to model the failure process and acceleration responses of two IR slope models with stratigraphic dips of 60° and 80°, respectively, under different seismic intensities. Next, we adopt the Particle Flow Code to examine the crack propagation features and peak ground acceleration amplification effects for the IR slopes. We find that the seismic failure pattern of IR slopes depends largely on rock layer inclination: buckling failure is triggered when rock layers are parallel or nearly parallel to the slope surface, while toppling failure is triggered when the rock layer inclination is significantly higher than that of the slope surface. Following seismic excitation, the damage is mainly observed in the weak rock layers, creating lateral stress on adjacent strong rocks, which undergoes deformation and ultimate macroscopic failure. Further, displacement of the IR slope is negatively correlated to rock layer inclination. Rock layer thickness has a major influence on the damaged area inside the slope mass, while rock layer stiffness mainly affects the deformation distribution near the slope shoulder.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Engineering Geology
dc.relation.isbasedon	10.1016/j.enggeo.2023.107312
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0909 Geomatic Engineering, 0999 Other Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.subject.classification	3705 Geology
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4019 Resources engineering and extractive metallurgy
dc.title	Seismic performance and failure mechanism of interbedded slopes with steep rock layers
dc.type	Journal Article
utslib.citation.volume	326
utslib.for	0905 Civil Engineering
utslib.for	0909 Geomatic Engineering
utslib.for	0999 Other Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-08T08:47:34Z
pubs.publication-status	Published
pubs.volume	326

Abstract:

Numerous interbedded rock (IR) slopes fail during the Wenchuan earthquake in the mountainous region of western China. Landslides are also triggered in IR slopes with a 60° layer inclination, which are generally stable in gravity-dominant environments. This study examines the effect of seismic motion on the response characteristics and failure patterns of IR slopes with steep layers to develop a landslide hazard assessment tool for earthquake-prone regions. First, we use a centrifuge shaking table test to model the failure process and acceleration responses of two IR slope models with stratigraphic dips of 60° and 80°, respectively, under different seismic intensities. Next, we adopt the Particle Flow Code to examine the crack propagation features and peak ground acceleration amplification effects for the IR slopes. We find that the seismic failure pattern of IR slopes depends largely on rock layer inclination: buckling failure is triggered when rock layers are parallel or nearly parallel to the slope surface, while toppling failure is triggered when the rock layer inclination is significantly higher than that of the slope surface. Following seismic excitation, the damage is mainly observed in the weak rock layers, creating lateral stress on adjacent strong rocks, which undergoes deformation and ultimate macroscopic failure. Further, displacement of the IR slope is negatively correlated to rock layer inclination. Rock layer thickness has a major influence on the damaged area inside the slope mass, while rock layer stiffness mainly affects the deformation distribution near the slope shoulder.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/177582