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Author:

Han, Junyan (Han, Junyan.) | Wang, Jiaxue (Wang, Jiaxue.) | Li, Liyun (Li, Liyun.) | Wang, Xiaoqiang (Wang, Xiaoqiang.) | El Naggar, M. Hesham (El Naggar, M. Hesham.) | Du, Xiuli (Du, Xiuli.)

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EI Scopus

Abstract:

Sloping sites are highly vulnerable to strong ground motions, which can induce lateral spreading and, in extreme cases, flow failure. This study investigates the seismic behavior of sloping sites subjected to Near-fault pulse-like (NF-P) ground motions. A two-dimensional finite element model of a sloping site was developed, utilizing a multiple yield surface plasticity constitutive model, which was validated with centrifuge test data. The validated model was then employed to analyze the pore pressure ratio, acceleration response, peak shear strain, and lateral displacement of soil subjected to both NF-P and Near-fault non-pulse (NF-NP) ground motions. The results demonstrate that, at high intensity levels, NF-P ground motions induce more severe liquefaction in loose sand layers, exacerbating shear deformations, as evidenced by a 43.18 % increase in peak shear strain. Liquefied loose sand layers are less effective at mitigating the effects of NF-P ground motions, resulting in persistently high peak accelerations at the surface. Furthermore, sloping sites experience substantially greater lateral displacements under NF-P ground motions, with lateral spreading displacement increasing by 150 %. NF-P ground motions also cause significantly larger lateral and vertical displacements compared to NF-NP ground motions, with lateral displacements reaching 0.97 m, and the soil maximum settlement and uplift being 2.67 and 2.60 times greater, respectively. © 2025

Keyword:

Seismic response Shear strain Shear deformation Faulting Plasticity testing Pore pressure Shear flow Digital elevation model Geochronology

Author Community:

  • [ 1 ] [Han, Junyan]The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing; 100124, China
  • [ 2 ] [Wang, Jiaxue]The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing; 100124, China
  • [ 3 ] [Li, Liyun]The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing; 100124, China
  • [ 4 ] [Wang, Xiaoqiang]The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing; 100124, China
  • [ 5 ] [El Naggar, M. Hesham]Geotechnical Research Centre, Department of Civil and Environmental Engineering, Western University, London, Canada
  • [ 6 ] [Du, Xiuli]The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing; 100124, China

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Source :

Soil Dynamics and Earthquake Engineering

ISSN: 0267-7261

Year: 2025

Volume: 195

4 . 0 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 6

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