Seismic analysis of irregular topography of hill and water-filled valley under oblique incident P- and SV-waves

YANG Yongbin; LIU Peng; ZHOU Zeyang; ZHANG Xiongfei

doi:10.11779/CJGE20231271

Volume 47 Issue 5

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Chinese Journal of Geotechnical Engineering > 2025 > 47(5): 889-902. > DOI: 10.11779/CJGE20231271

YANG Yongbin, LIU Peng, ZHOU Zeyang, ZHANG Xiongfei. Seismic analysis of irregular topography of hill and water-filled valley under oblique incident P- and SV-waves[J]. Chinese Journal of Geotechnical Engineering, 2025, 47(5): 889-902. DOI: 10.11779/CJGE20231271

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Seismic analysis of irregular topography of hill and water-filled valley under oblique incident P- and SV-waves

1.
School of Civil Engineering, Chongqing University, Chongqing 400045, China
2.
School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China
3.
School of Civil and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China

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Received Date: December 26, 2023
Available Online: August 20, 2024

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Abstract

Abstract

As a common composite terrain, the effects of the irregular topography of hill and water-filled valley on the ground motion are currently unclear. Therefore, the coupling of soil and liquid in finite domain is realized through the theoretical analysis, the seismic analysis of irregular topography of hill-water-filled valley under oblique incident P- and SV-waves by the finite-infinite element method is conducted, and the effects of the relative position between the hill and the water-filled valley on the ground motion are discussed. The new findings of this study include: (1) The hill located at the incident side of the seismic waves of the water-filled valley can restrain the amplification effects of the maximum horizontal acceleration of ground on the "near" edge of the water-filled valley under P- and SV-waves. (2) For the SV-waves with overly critical angles and the hill located at the incident side of the seismic waves of the water-filled valley, the maximum horizontal acceleration of ground on the "far" edge of the water-filled valley is amplified instead. (3) The relative position between the hill and the water-filled valley, the seismic wave types and the critical angles have significant influences on the displacement spectra at both sides of the irregular topography.
- hill-water-filled valley,
- infinite element,
- soil-liquid coupling,
- ground motion response,
- overly critical angle

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References

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