Experimental Study on Creep Characteristics of Saturated Q2 Loess
Catastrophic failures often occur to engineered infrastructure in areas underlain by saturated loess due to its high moisture content (degree of saturation >85%), low shear strength, and large deformation. Time effect (rheological property) and water are the most important factors affecting t...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.815275/full |
| _version_ | 1828893350528286720 |
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| author | Xiaowei Liu Xiaowei Liu Xudong Zhang Xiaogang Fu Tianxiang Yang Zisong Su |
| author_facet | Xiaowei Liu Xiaowei Liu Xudong Zhang Xiaogang Fu Tianxiang Yang Zisong Su |
| author_sort | Xiaowei Liu |
| collection | DOAJ |
| description | Catastrophic failures often occur to engineered infrastructure in areas underlain by saturated loess due to its high moisture content (degree of saturation >85%), low shear strength, and large deformation. Time effect (rheological property) and water are the most important factors affecting the mechanical properties of saturated loess. The rheological mechanism and characteristics of saturated loess are vital to understanding the interaction between infrastructure and foundation and the trigger of failures. Based on step-load testing, this study obtains the displacement-time relationship of saturated Q2 loess to analyze its creep behavior. Experimental results show that the creep strength of saturated Q2 loess is 75–80% of its unconfined compression strength, and the creep behavior can be simulated by the Burgers model. Additionally, the rheological parameters under different load conditions are obtained using the improved Marquardt iterative method. All these parameters can be used for numerical analysis of the rheological behavior of saturated Q2 loess. |
| first_indexed | 2024-12-13T13:52:11Z |
| format | Article |
| id | doaj.art-4915239a10f14ca0be113e01a3db9fe8 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-13T13:52:11Z |
| publishDate | 2022-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-4915239a10f14ca0be113e01a3db9fe82022-12-21T23:43:06ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-01-011010.3389/feart.2022.815275815275Experimental Study on Creep Characteristics of Saturated Q2 LoessXiaowei Liu0Xiaowei Liu1Xudong Zhang2Xiaogang Fu3Tianxiang Yang4Zisong Su5Key Laboratory of Mechanics on Disaster and Environment in Western China, The Ministry of Education of China, Lanzhou University, Lanzhou, ChinaCollege of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, ChinaCollege of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, ChinaCollege of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, ChinaCollege of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, ChinaCollege of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, ChinaCatastrophic failures often occur to engineered infrastructure in areas underlain by saturated loess due to its high moisture content (degree of saturation >85%), low shear strength, and large deformation. Time effect (rheological property) and water are the most important factors affecting the mechanical properties of saturated loess. The rheological mechanism and characteristics of saturated loess are vital to understanding the interaction between infrastructure and foundation and the trigger of failures. Based on step-load testing, this study obtains the displacement-time relationship of saturated Q2 loess to analyze its creep behavior. Experimental results show that the creep strength of saturated Q2 loess is 75–80% of its unconfined compression strength, and the creep behavior can be simulated by the Burgers model. Additionally, the rheological parameters under different load conditions are obtained using the improved Marquardt iterative method. All these parameters can be used for numerical analysis of the rheological behavior of saturated Q2 loess.https://www.frontiersin.org/articles/10.3389/feart.2022.815275/fullsaturated loesscreepstep loadburgers modelflow failure |
| spellingShingle | Xiaowei Liu Xiaowei Liu Xudong Zhang Xiaogang Fu Tianxiang Yang Zisong Su Experimental Study on Creep Characteristics of Saturated Q2 Loess Frontiers in Earth Science saturated loess creep step load burgers model flow failure |
| title | Experimental Study on Creep Characteristics of Saturated Q2 Loess |
| title_full | Experimental Study on Creep Characteristics of Saturated Q2 Loess |
| title_fullStr | Experimental Study on Creep Characteristics of Saturated Q2 Loess |
| title_full_unstemmed | Experimental Study on Creep Characteristics of Saturated Q2 Loess |
| title_short | Experimental Study on Creep Characteristics of Saturated Q2 Loess |
| title_sort | experimental study on creep characteristics of saturated q2 loess |
| topic | saturated loess creep step load burgers model flow failure |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.815275/full |
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