Seismic Stability of Heterogeneous Slopes with Tensile Strength Cutoff Using Discrete-Kinematic Mechanism and a Pseudostatic Approach

Rao, P; Ouyang, P; Wu, J; Li, P; Nimbalkar, S; Chen, Q

Seismic Stability of Heterogeneous Slopes with Tensile Strength Cutoff Using Discrete-Kinematic Mechanism and a Pseudostatic Approach

Rao, P Ouyang, P Wu, J Li, P Nimbalkar, S

Chen, Q

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Publisher:: ASCE-AMER SOC CIVIL ENGINEERS
Publication Type:: Journal Article
Citation:: International Journal of Geomechanics, 2022, 22, (12)
Issue Date:: 2022-12-01

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Field	Value	Language
dc.contributor.author	Rao, P
dc.contributor.author	Ouyang, P
dc.contributor.author	Wu, J
dc.contributor.author	Li, P
dc.contributor.author	Nimbalkar, S https://orcid.org/0000-0002-1538-3396
dc.contributor.author	Chen, Q
dc.date.accessioned	2023-03-28T22:59:47Z
dc.date.available	2023-03-28T22:59:47Z
dc.date.issued	2022-12-01
dc.identifier.citation	International Journal of Geomechanics, 2022, 22, (12)
dc.identifier.issn	1532-3641
dc.identifier.issn	1943-5622
dc.identifier.uri	http://hdl.handle.net/10453/168769
dc.description.abstract	Frequently, the Mohr-Coulomb (M-C) yield criterion is used to determine slope stability. It offers an exaggerated, unreliable, and cautious assessment of the tensile strength of bonded materials, which are composed primarily of compressive elements, especially when subjected to seismic excitation. This work modifies the M-C yield criterion to integrate the concept of tensile strength cutoff, which involves restricting or eliminating the tensile strength of bonded materials. Analyses of the seismic stability of heterogeneous slopes use the discrete kinematic approach. Using a pseudostatic method of analysis, vertical and horizontal forces simulating seismic excitation are characterized. The primary objective of this study is to provide an insight into the effect of tensile strength cutoff on critical failure surfaces. For steep slopes, seismic excitation increases the range of base failure and decreases stability by 45%, while tensile strength cutoff exacerbates the decline. On steep slopes, an overturning failure is guided by the tensile strength cutoff; however, on mild slopes, it is indifferent to such a cutoff. Its application to two nonhomogeneous slopes indicates that a face failure may occur when a relatively weak layer exists in the slope and that the introduction of a tension crack yields the most conservative estimates, while its failure surface corresponds to the critical failure surface with tensile strength cutoff under the strong seismic excitation.
dc.language	English
dc.publisher	ASCE-AMER SOC CIVIL ENGINEERS
dc.relation.ispartof	International Journal of Geomechanics
dc.relation.isbasedon	10.1061/(ASCE)GM.1943-5622.0002578
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	General Mathematics
dc.title	Seismic Stability of Heterogeneous Slopes with Tensile Strength Cutoff Using Discrete-Kinematic Mechanism and a Pseudostatic Approach
dc.type	Journal Article
utslib.citation.volume	22
utslib.for	0905 Civil Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
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
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-28T22:59:24Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	22
utslib.citation.issue	12

Abstract:

Frequently, the Mohr-Coulomb (M-C) yield criterion is used to determine slope stability. It offers an exaggerated, unreliable, and cautious assessment of the tensile strength of bonded materials, which are composed primarily of compressive elements, especially when subjected to seismic excitation. This work modifies the M-C yield criterion to integrate the concept of tensile strength cutoff, which involves restricting or eliminating the tensile strength of bonded materials. Analyses of the seismic stability of heterogeneous slopes use the discrete kinematic approach. Using a pseudostatic method of analysis, vertical and horizontal forces simulating seismic excitation are characterized. The primary objective of this study is to provide an insight into the effect of tensile strength cutoff on critical failure surfaces. For steep slopes, seismic excitation increases the range of base failure and decreases stability by 45%, while tensile strength cutoff exacerbates the decline. On steep slopes, an overturning failure is guided by the tensile strength cutoff; however, on mild slopes, it is indifferent to such a cutoff. Its application to two nonhomogeneous slopes indicates that a face failure may occur when a relatively weak layer exists in the slope and that the introduction of a tension crack yields the most conservative estimates, while its failure surface corresponds to the critical failure surface with tensile strength cutoff under the strong seismic excitation.

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http://hdl.handle.net/10453/168769