| Institute of Geomechanics, Chinese Academy of Geological Sciences | Host |
| Citation: |
Zheng LIU, Bin LI, Kai HE, Yang GAO, Chenhui WANG. 2020. Research of dynamic response patterns of high steep rock slope under earthquake effects. Journal of Geomechanics, 26(1): 115-124. doi: 10.12090/j.issn.1006-6616.2020.26.01.012
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Research of dynamic response patterns of high steep rock slope under earthquake effects
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Abstract
Base on the research of single-sided high steep slopes in southwestern China, dynamic responses of double-sided slopes are analysed which include changes of height, angle and width. Results show that predominant frequencies of slopes mainly concentrate in 1~4 Hz when inputting Ricker waves with varying center frequencies and the results alter in different parts of the slope. Dynamic response patterns mainly depend on slope height, contours of amplification coefficients parallel to the bottom of slope at lower heights while distribute as closed regions near surface when height increases. This means numerical value of amplification linearly increase with the height of the slope at a relatively low height but fluctuate at a great height. In addition, slope angle changes the direction of contours and makes amplification factors greater in steep slope, but dynamic patterns of slope are unaffected by those changes. Double-sided slopes show similar dynamic pattern with the single ones, but reflection and refraction of quake waves caused by slope shape make the amplification greater in double-sided slopes, which manifest as intensified contours and multiplied acceleration.-
Keywords:
- earthquake /
- high steep rock slopes /
- topography /
- dynamic response /
- amplification effect /
- numerical simulation
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References
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Zheng LIU, Bin LI, Kai HE, Yang GAO, Chenhui WANG. 2020. Research of dynamic response patterns of high steep rock slope under earthquake effects. Journal of Geomechanics, 26(1): 115-124. doi: 10.12090/j.issn.1006-6616.2020.26.01.012
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- Figure 1. Scales and boundary conditions of the slope model
- Figure 2. Ricker wavelet and sinusoidal seimic wave for calculation
- Figure 3. The calculation model and acceleration records of the slope
- Figure 4. Monitoring curves of the slope surface acceleration under the action of Ricker wave
- Figure 5. Contours of slope acceleration amplification coefficients with different slope heights
- Figure 6. Fitting curves of acceleration amplification coefficients in different places of the high steep slope
- Figure 7. Contours of acceleration amplification coefficients at different angles of the high steep slopes
- Figure 8. The model and monitoring points of the double-sided high steep slope
- Figure 9. Contours of acceleration amplification coefficients of double-sided slopes with different heights and widths
- Figure 10. Contours of acceleration amplification factors of double-sided slopes with different angles
- Figure 11. Fitting curves of acceleration amplification coefficients with the change of slope angles of double and single-sided slopes
- Figure 12. Fitting curves of acceleration amplification coefficients with the change of crest widths of slope surface(Taking 200 m slope as an example)