SHAN Zhicheng,YU Xu,ZHUANG Haiyang,et al.Seismic Response Analysis of Soil‑Pile‑Isolated Structures with Different Aspect Ratios of Superstructure[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(02):405-415.
SHAN Zhicheng,YU Xu,ZHUANG Haiyang,et al.Seismic Response Analysis of Soil‑Pile‑Isolated Structures with Different Aspect Ratios of Superstructure[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(02):405-415. DOI: 10.13409/j.cnki.jdpme.20231009002.
Seismic Response Analysis of Soil‑Pile‑Isolated Structures with Different Aspect Ratios of Superstructure
To explore the influence of aspect ratio on the seismic responses of base-isolated structures built on flexible foundations
four traditional seismic-resistant and base-isolated frame structure models with different aspect ratios were established using ABAQUS finite element software. For different site conditions
models of base-isolated structures on both flexible and rigid foundations were established for comparison
so as to analyze the influence of Soil-Structure Interaction (SSI) effect on the seismic response patterns and isolation efficiency in structures with different aspect ratios. The results showed that with the increase of the aspect ratio
peak floor accelerations in isolated structures first decreased and then increased with increasing floor levels. Meanwhile
the displacement of the isolation layer continuously decreased
and the isolation efficiency gradually decreased. However
the variation patterns of the isolation efficiency with increasing floor levels were inconsistent among structures with different aspect ratios. For structures with smaller aspect ratios
the isolation efficiency was optimal at the top floor. As the aspect ratios increased
the optimal isolation efficiency layer appeared in the upper middle floors. Furthermore
by using peak floor acceleration
isolation layer displacement
and isolation efficiency as research parameters
it was concluded that SSI effect showed significantly stronger influence on isolation layers and top floor of structures compared to other floors. The SSI effect increased the displacement response of isolation layer in isolated structures and reduced the isolation efficiency of the isolation system. This adverse influence intensified with increasing aspect ratios of isolated structures.. Therefore
when designing isolated structures
the combined influence of the aspect ratio of the superstructure and the SSI effect on structures should be comprehensively considered.
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