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- W3177103412 abstract "This paper proposes a hybrid seismic isolation system composed of geotechnical (a layer of sand or gravel as foundation soil) and structural isolation (a low-friction foundation sliding layer), aiming to effectively improve the seismic performance of rural buildings with an economical solution. The isolation system is most suitable for low-rise buildings in high-seismic areas. It is also effective in colder climates as replacing sand or gravel as the foundation soil eliminates frost heave. Shake table testing of three 1/4 scale models of two-story masonry buildings was carried out: an unreinforced brick masonry structure (model MA, without isolation), an identical structure with geotechnical isolation (model MS, with a layer of gravel as the foundation soil), and an identical structure with hybrid geotechnical and structural isolation (model MC). The dynamic characteristics and responses of the three structures were assessed and compared. Test results showed that shear failure of brick walls of model MA occurred at the first story when the input peak ground acceleration reached 0.44g. For model MS, a similar shear failure mode occurred when the acceleration reached 1.02g. Model MC relied on the layer of gravel for isolation before 0.44g, and then several cracks occurred at the foundation sliding layer, which was a sign of sliding. The plastic damage was mainly concentrated in the second story, and model MC showed bending-dominated deformation when the acceleration increased to 1.24g. This study clearly demonstrates the improved seismic performance and technical feasibility of the cost-effective hybrid isolation system." @default.
- W3177103412 created "2021-07-05" @default.
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- W3177103412 date "2021-06-18" @default.
- W3177103412 modified "2023-10-16" @default.
- W3177103412 title "Hybrid geotechnical and structural seismic isolation: Shake table tests" @default.
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- W3177103412 doi "https://doi.org/10.1002/eqe.3505" @default.
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