Analysis of the Dynamic Reaction and Instability Deformation Differences of Loess Slopes with Different Landforms

Analysis of the Dynamic Reaction and Instability Deformation Differences of Loess Slopes with Different Landforms | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Analysis of the Dynamic Reaction and Instability Deformation Differences of Loess Slopes with Different Landforms Jiapei Gu, Fanchao Meng, Chaoyu Chang, Yunhui Zhao, Feng Qiao, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6545921/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 04 Oct, 2025 Read the published version in Natural Hazards → Version 1 posted 5 You are reading this latest preprint version Abstract Loess slopes such as loess ridges, mounds, and gully terrains are ubiquitous on the Loess Plateau, where these localized irregular topographies cause amplification and attenuation of seismic motions, thereby affecting the stabilization of slopes. On the basis of loess topography and geomorphology of the Xi Hai Gu region (Xiji, Haiyuan, and Guyuan) and indoor experiments,by establishing a three-dimensional numerical model of loess beam and loess Hill slope, the difference of ground motion response and deformation of loess slopes in different landforms is analyzed.The study revealed the following findings: 1. The PGA of the two slope generalization models has the largest amplification factor at the top of the slope, and the smallest amplification factor near the loess-mudstone contact surface. 2. Under identical seismic loading, the dynamic reaction of the loess mound slope was more pronounced than that of the loess ridge slope. Under varying seismic loading conditions, the PGA amplification factor of the loess mound slope exhibited greater variability. 3. The Fourier spectrum amplitude of the loess mound slope was greater than that of the loess ridge slope, with different predominant frequencies observed at the slope middle section for the two slope types. 4. Under the action of ground motion, both slope models experience instability and failure. The maximum movement of the loess mound slope is larger than that of the loess ridge slope. The maximum shear strain increment of the loess ridge slope takes place at the crown of the slope, while the maximum shear strain increment of the loess mound slope takes place at the slope shoulder. The research results have certain value for those engaged in the study of loess seismic landslides. FLAC3D loess ridge slope loess mound slope dynamic response deformation analysis Full Text Cite Share Download PDF Status: Published Journal Publication published 04 Oct, 2025 Read the published version in Natural Hazards → Version 1 posted Reviewers agreed at journal 06 May, 2025 Reviewers invited by journal 06 May, 2025 Editor invited by journal 05 May, 2025 Editor assigned by journal 29 Apr, 2025 First submitted to journal 28 Apr, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6545921","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":452435712,"identity":"f6890011-366e-4216-9c1f-5919b5eb00f7","order_by":0,"name":"Jiapei Gu","email":"","orcid":"","institution":"Institute of Disaster Prevention","correspondingAuthor":false,"prefix":"","firstName":"Jiapei","middleName":"","lastName":"Gu","suffix":""},{"id":452435713,"identity":"596ead65-b8d3-4a2c-8ac5-ed33e0bdc66a","order_by":1,"name":"Fanchao 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On the basis of loess topography and geomorphology of the Xi Hai Gu region (Xiji, Haiyuan, and Guyuan) and indoor experiments,by establishing a three-dimensional numerical model of loess beam and loess Hill slope, the difference of ground motion response and deformation of loess slopes in different landforms is analyzed.The study revealed the following findings: 1. The PGA of the two slope generalization models has the largest amplification factor at the top of the slope, and the smallest amplification factor near the loess-mudstone contact surface. 2. Under identical seismic loading, the dynamic reaction of the loess mound slope was more pronounced than that of the loess ridge slope. Under varying seismic loading conditions, the PGA amplification factor of the loess mound slope exhibited greater variability. 3. The Fourier spectrum amplitude of the loess mound slope was greater than that of the loess ridge slope, with different predominant frequencies observed at the slope middle section for the two slope types. 4. Under the action of ground motion, both slope models experience instability and failure. The maximum movement of the loess mound slope is larger than that of the loess ridge slope. The maximum shear strain increment of the loess ridge slope takes place at the crown of the slope, while the maximum shear strain increment of the loess mound slope takes place at the slope shoulder. 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