Analysis of the Structural Behavior Evolution of Reinforced Soil Retaining Walls Under the Combined Effects of Rainfall and Earthquake
Major earthquakes and rainfall may occur at the same time, necessitating further investigation into the dynamic characteristics and responses of reinforced soil retaining walls subjected to the combined forces of rainfall and seismic activity. Three sets of shaking table tests on model retaining wal...
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MDPI AG
2024-12-01
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| author | Xinxin Li Xiaoguang Cai Sihan Li Xin Huang Chen Zhu Honglu Xu |
| author_facet | Xinxin Li Xiaoguang Cai Sihan Li Xin Huang Chen Zhu Honglu Xu |
| author_sort | Xinxin Li |
| collection | DOAJ |
| description | Major earthquakes and rainfall may occur at the same time, necessitating further investigation into the dynamic characteristics and responses of reinforced soil retaining walls subjected to the combined forces of rainfall and seismic activity. Three sets of shaking table tests on model retaining walls were designed, a modular reinforced earth retaining wall was utilized as the subject of this study, and a custom-made device was made to simulate rainfall conditions of varying intensities. These tests monitored the rainwater infiltration pattern, macroscopic phenomena, panel displacement, tension behavior, dynamic characteristics, and acceleration response of the modular reinforced earth retaining wall during vibration under different rainfall intensities. The results indicated the following. (1) Rainwater infiltration can be categorized into three stages: rapid rise, rapid decline, and slow decline to stability. The duration for infiltration to reach stability increases with greater rainfall. (2) An increase in rainfall intensity enhances the seismic stability of the retaining wall panel, as higher rainfall intensity results in reduced sand leakage from the panel, thereby diminishing panel deformation during vibration. (3) Increased rainfall intensity decreases the shear strength of the soil, leading to a greater load on the reinforcement. (4) The natural vibration frequencies of the three groups of retaining walls decreased by 0.21%, 0.54%, and 2.326%, respectively, indicating some internal damage within the retaining walls, although the degree of damage was not severe. Additionally, the peak displacement of the panel increased by 0.91 mm, 0.63 mm, and 0.61 mm, respectively. (5) The amplification effect of rainfall on internal soil acceleration is diminished, with this weakening effect becoming more pronounced as rainfall intensity increases. These research findings can provide a valuable reference for multi-disaster risk assessments of modular reinforced soil retaining walls. |
| format | Article |
| id | doaj-art-89fec48947634fe99296df54a3007392 |
| institution | Kabale University |
| issn | 2075-5309 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-89fec48947634fe99296df54a30073922025-01-10T13:16:05ZengMDPI AGBuildings2075-53092024-12-0115111510.3390/buildings15010115Analysis of the Structural Behavior Evolution of Reinforced Soil Retaining Walls Under the Combined Effects of Rainfall and EarthquakeXinxin Li0Xiaoguang Cai1Sihan Li2Xin Huang3Chen Zhu4Honglu Xu5Institute of Disaster Prevention, College of Geological Engineering, Langfang 065201, ChinaChina Earthquake Disaster Prevention Center, Beijing 100029, ChinaInstitute of Disaster Prevention, College of Geological Engineering, Langfang 065201, ChinaInstitute of Disaster Prevention, College of Geological Engineering, Langfang 065201, ChinaCollege of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, ChinaInstitute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, ChinaMajor earthquakes and rainfall may occur at the same time, necessitating further investigation into the dynamic characteristics and responses of reinforced soil retaining walls subjected to the combined forces of rainfall and seismic activity. Three sets of shaking table tests on model retaining walls were designed, a modular reinforced earth retaining wall was utilized as the subject of this study, and a custom-made device was made to simulate rainfall conditions of varying intensities. These tests monitored the rainwater infiltration pattern, macroscopic phenomena, panel displacement, tension behavior, dynamic characteristics, and acceleration response of the modular reinforced earth retaining wall during vibration under different rainfall intensities. The results indicated the following. (1) Rainwater infiltration can be categorized into three stages: rapid rise, rapid decline, and slow decline to stability. The duration for infiltration to reach stability increases with greater rainfall. (2) An increase in rainfall intensity enhances the seismic stability of the retaining wall panel, as higher rainfall intensity results in reduced sand leakage from the panel, thereby diminishing panel deformation during vibration. (3) Increased rainfall intensity decreases the shear strength of the soil, leading to a greater load on the reinforcement. (4) The natural vibration frequencies of the three groups of retaining walls decreased by 0.21%, 0.54%, and 2.326%, respectively, indicating some internal damage within the retaining walls, although the degree of damage was not severe. Additionally, the peak displacement of the panel increased by 0.91 mm, 0.63 mm, and 0.61 mm, respectively. (5) The amplification effect of rainfall on internal soil acceleration is diminished, with this weakening effect becoming more pronounced as rainfall intensity increases. These research findings can provide a valuable reference for multi-disaster risk assessments of modular reinforced soil retaining walls.https://www.mdpi.com/2075-5309/15/1/115combined effect of rainfall and earthquakerainwater infiltrationlaw of displacement and tensiondynamic characteristicsacceleration response |
| spellingShingle | Xinxin Li Xiaoguang Cai Sihan Li Xin Huang Chen Zhu Honglu Xu Analysis of the Structural Behavior Evolution of Reinforced Soil Retaining Walls Under the Combined Effects of Rainfall and Earthquake Buildings combined effect of rainfall and earthquake rainwater infiltration law of displacement and tension dynamic characteristics acceleration response |
| title | Analysis of the Structural Behavior Evolution of Reinforced Soil Retaining Walls Under the Combined Effects of Rainfall and Earthquake |
| title_full | Analysis of the Structural Behavior Evolution of Reinforced Soil Retaining Walls Under the Combined Effects of Rainfall and Earthquake |
| title_fullStr | Analysis of the Structural Behavior Evolution of Reinforced Soil Retaining Walls Under the Combined Effects of Rainfall and Earthquake |
| title_full_unstemmed | Analysis of the Structural Behavior Evolution of Reinforced Soil Retaining Walls Under the Combined Effects of Rainfall and Earthquake |
| title_short | Analysis of the Structural Behavior Evolution of Reinforced Soil Retaining Walls Under the Combined Effects of Rainfall and Earthquake |
| title_sort | analysis of the structural behavior evolution of reinforced soil retaining walls under the combined effects of rainfall and earthquake |
| topic | combined effect of rainfall and earthquake rainwater infiltration law of displacement and tension dynamic characteristics acceleration response |
| url | https://www.mdpi.com/2075-5309/15/1/115 |
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