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A substructure model for water-solid interaction under obliquely incident earthquake in canyon site
Abstract Structures crossing irregular topography features such as canyons and mountains may suffer from spatially varying ground motions due to topographic effect. In this paper, a two-dimensional substructure model of water-solid interaction in canyon site is proposed to study the effect of canyon topography on the seismic responses of water-canyon system, in which the wave radiation effect of infinite solid domains is simulated by the combined zigzag-paraxial boundary and the solid-water interaction is considered by interface conditions. Moreover, to verify the proposed substructure model, it is used to calculate the seismic responses of a V-shaped water-canyon system and a semi-circular water-canyon system under obliquely incident P-SV waves in homogeneous half space. Afterwards, we conduct the seismic analysis of water-canyon system. The results indicate that the amplification and reduction of ground motion is affected by geometric shape of canyons and water depth, and the maximum amplification of V-shaped water-canyon system can beyond an order of 200%, and the maximum amplification of semi-circular water-canyon system is less than 200%.
Highlights The combined zigzag-paraxial boundary is used to describe complex canyon topography and input seismic waves. A substructure model for water-solid interaction under obliquely incident earthquake in canyon site is presented. A parametric analysis is conducted to investigate the effect of canyon shape and water on seismic response of canyon site.
A substructure model for water-solid interaction under obliquely incident earthquake in canyon site
Abstract Structures crossing irregular topography features such as canyons and mountains may suffer from spatially varying ground motions due to topographic effect. In this paper, a two-dimensional substructure model of water-solid interaction in canyon site is proposed to study the effect of canyon topography on the seismic responses of water-canyon system, in which the wave radiation effect of infinite solid domains is simulated by the combined zigzag-paraxial boundary and the solid-water interaction is considered by interface conditions. Moreover, to verify the proposed substructure model, it is used to calculate the seismic responses of a V-shaped water-canyon system and a semi-circular water-canyon system under obliquely incident P-SV waves in homogeneous half space. Afterwards, we conduct the seismic analysis of water-canyon system. The results indicate that the amplification and reduction of ground motion is affected by geometric shape of canyons and water depth, and the maximum amplification of V-shaped water-canyon system can beyond an order of 200%, and the maximum amplification of semi-circular water-canyon system is less than 200%.
Highlights The combined zigzag-paraxial boundary is used to describe complex canyon topography and input seismic waves. A substructure model for water-solid interaction under obliquely incident earthquake in canyon site is presented. A parametric analysis is conducted to investigate the effect of canyon shape and water on seismic response of canyon site.
A substructure model for water-solid interaction under obliquely incident earthquake in canyon site
Zhao, Mi (author) / Liu, Mindong (author) / Wang, Piguang (author) / Su, Chengkun (author) / Zhang, Guoliang (author) / Du, Xiuli (author)
2022-07-04
Article (Journal)
Electronic Resource
English
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