Prediction of ground vibration under combined seismic and high-speed train loads considering earthquake intensity and site category
Based on a two-and-half-dimensional finite element model (2.5D FEM), the layered ground vibration under combined seismic and high-speed train loads was investigated. On this basis, the effect of site category and earthquake intensity on ground vibration under the combined action of two dynamic loads...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-02-01
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| Series: | Soils and Foundations |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0038080623001415 |
| _version_ | 1797304615661731840 |
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| author | Wei Xie Guangyun Gao Jian Song Yonggang Jia |
| author_facet | Wei Xie Guangyun Gao Jian Song Yonggang Jia |
| author_sort | Wei Xie |
| collection | DOAJ |
| description | Based on a two-and-half-dimensional finite element model (2.5D FEM), the layered ground vibration under combined seismic and high-speed train loads was investigated. On this basis, the effect of site category and earthquake intensity on ground vibration under the combined action of two dynamic loads was analyzed. Numerical examples indicated that ground vibration displacement due to combined loads decreases with the increase of soil stiffness, while the influence of soil stiffness on the ground vibration is small when the hardness of the subsoil is large. The peak ground displacement (PGD) is a reasonable seismic intensity index for predicting the ground vibration displacement at the track center under the combined loads, which has a higher accuracy for hard ground. In view of this, an equivalent shear wave velocity and PGD-based prediction formula was proposed to estimate the ground vibration under combined seismic and high-speed train loads. Reliability of the prediction formula was verified through comparison with results of numerical tests, indicating that the prediction formula has good applicability to different site conditions and seismic events. Compared with the previous study, it demonstrated that the prediction method provided an effective means for estimating ground vibration caused by a high-speed train load during earthquakes. |
| first_indexed | 2024-03-08T00:12:58Z |
| format | Article |
| id | doaj.art-53ec0c3167bc45b4a3cff3e4f9951a54 |
| institution | Directory Open Access Journal |
| issn | 2524-1788 |
| language | English |
| last_indexed | 2024-03-08T00:12:58Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Soils and Foundations |
| spelling | doaj.art-53ec0c3167bc45b4a3cff3e4f9951a542024-02-17T06:37:09ZengElsevierSoils and Foundations2524-17882024-02-01641101412Prediction of ground vibration under combined seismic and high-speed train loads considering earthquake intensity and site categoryWei Xie0Guangyun Gao1Jian Song2Yonggang Jia3PowerChina Huadong Engineering Corporation Limited, Hangzhou 311122, China; Department of Geotechnical Engineering & Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, ChinaDepartment of Geotechnical Engineering & Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; Corresponding authors.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China; Corresponding authors.Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, ChinaBased on a two-and-half-dimensional finite element model (2.5D FEM), the layered ground vibration under combined seismic and high-speed train loads was investigated. On this basis, the effect of site category and earthquake intensity on ground vibration under the combined action of two dynamic loads was analyzed. Numerical examples indicated that ground vibration displacement due to combined loads decreases with the increase of soil stiffness, while the influence of soil stiffness on the ground vibration is small when the hardness of the subsoil is large. The peak ground displacement (PGD) is a reasonable seismic intensity index for predicting the ground vibration displacement at the track center under the combined loads, which has a higher accuracy for hard ground. In view of this, an equivalent shear wave velocity and PGD-based prediction formula was proposed to estimate the ground vibration under combined seismic and high-speed train loads. Reliability of the prediction formula was verified through comparison with results of numerical tests, indicating that the prediction formula has good applicability to different site conditions and seismic events. Compared with the previous study, it demonstrated that the prediction method provided an effective means for estimating ground vibration caused by a high-speed train load during earthquakes.http://www.sciencedirect.com/science/article/pii/S0038080623001415Seismic-high speed train loadsGround vibration predictionEarthquake intensitySite category2.5D FEM |
| spellingShingle | Wei Xie Guangyun Gao Jian Song Yonggang Jia Prediction of ground vibration under combined seismic and high-speed train loads considering earthquake intensity and site category Soils and Foundations Seismic-high speed train loads Ground vibration prediction Earthquake intensity Site category 2.5D FEM |
| title | Prediction of ground vibration under combined seismic and high-speed train loads considering earthquake intensity and site category |
| title_full | Prediction of ground vibration under combined seismic and high-speed train loads considering earthquake intensity and site category |
| title_fullStr | Prediction of ground vibration under combined seismic and high-speed train loads considering earthquake intensity and site category |
| title_full_unstemmed | Prediction of ground vibration under combined seismic and high-speed train loads considering earthquake intensity and site category |
| title_short | Prediction of ground vibration under combined seismic and high-speed train loads considering earthquake intensity and site category |
| title_sort | prediction of ground vibration under combined seismic and high speed train loads considering earthquake intensity and site category |
| topic | Seismic-high speed train loads Ground vibration prediction Earthquake intensity Site category 2.5D FEM |
| url | http://www.sciencedirect.com/science/article/pii/S0038080623001415 |
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