COMPARATIVE ASSESSMENT OF THE ROCKING BEHAVIOR OF SEISMIC ISOLATED BRIDGES

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Pourya Tabiehzad Thesis.pdf

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2021-9-06

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Tabiehzad, Pourya

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In this thesis study a comprehensive roadmap is proposed for detailed modeling of rocking behavior of superstructure deck. Furthermore, a parametric study is conducted to determine effect of the superstructure rocking in enhancing the seismic performance of the box girder type bridge structures. For this purpose, various nonlinear models varying based on one chosen parameter are designed. Nonlinear boundary time history analysis (NTHA) of the models are then conducted being exposed to a set of ground motions scaled with reference to response spectra obtained for a specified coordinate in Canakkale region of Turkey. In the analysis, the effect of different parameters such as number of spans, eccentricity (e) of the bearing lines with respect to pier axis, pier height, span length, friction coefficient of the Friction Pendulum Sliding (FPS) Isolators, radius of curvature of FPS and ground motion scale and intensity are considered. The results of NTHA are then used to discuss the effects of these parameters on the seismic performance of box girder bridges in terms of pier moment and base shear.

Subject Keywords

Seismic Isolation, Parametric Study, Rocking of Superstructure

URI

https://hdl.handle.net/11511/94564

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

P. Tabiehzad, “COMPARATIVE ASSESSMENT OF THE ROCKING BEHAVIOR OF SEISMIC ISOLATED BRIDGES,” M.S. - Master of Science, Middle East Technical University, 2021.