Torsional response of seismic isolated buildings considering actual distribution of design coefficient of friction among curved surface sliders

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2021-9-3

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Yaşar, Uğur Sergen

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In this study, torsional response of seismic isolated buildings with curved surface slider (CSS) isolators are investigated considering actual distribution of design coefficient of friction in the CSS isolator. For this purpose, experimental results are used to characterize frictional properties of CSS isolator. Then, nonlinear response history analyses are performed using three-dimensional model of 3 structures that are developed based on a hospital structure. Torsional response of the structures and the parameters that influence the torsion are investigated. The analyses revealed that if the effect of contact pressure and heating on the friction coefficient is not taken into account, the additional displacements in the CSS isolators due to torsion are significantly underestimated. It is also found that increasing the number of groups within isolation system is an effective way to reduce torsion, if the isolators are seperated into groups based on axial loads on them.

Subject Keywords

Seismic Base Isolation, Curved Surface Slider, Friction Coefficient, Torsional Response

URI

https://hdl.handle.net/11511/93035

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

U. S. Yaşar, “Torsional response of seismic isolated buildings considering actual distribution of design coefficient of friction among curved surface sliders,” M.S. - Master of Science, Middle East Technical University, 2021.