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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 49857 (09)
- University: Sharif University of Technology
- Department: Civil Engineering
- Advisor(s): Mohtasham Dolatshahi, Kiarash
- Abstract:
- Up till now, various contributions of research to soil-structure-interaction context have been primarily focused on structural systems exhibiting elastic-perfectly plastic material behavior. In this paper, combined effects of material degradation, p-delta, and soil-structure-interaction considering foundation uplift have been deemed to determine seismic response of a single degree of freedom system. The system is composed of a column with a lumped mass on top that is placed on a rigid foundation. The foundation is mounted on Winkler springs and dashpots to account for soil-foundation compliance and material/radiational damping. The springs are tensionless to guarantee that uplift phenomenon is realistically modelled. Three sets of flexural degradations for capturing nonlinear performance of the column are defined to be categorized as low, moderate, and high decay levels and the response of each system is compared to the corresponding system with elastic-perfectly plastic material behavior. The results reveal that material degradation can exhibit detrimental effect on performance of soil-structure systems that cannot be identified in elastic-perfectly plastic material model which in turn dynamic instability is prone to occur
- Keywords:
- Foundation Uplift ; Soil-Structure Interaction ; Dynamic Instability ; Drift Ratio ; Material Degradation
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