COMPARATIVE ASSESSMENT OF THE ROCKING BEHAVIOR OF SEISMIC ISOLATED BRIDGES

Download

Pourya Tabiehzad Thesis.pdf

Date

2021-9-06

Author

Tabiehzad, Pourya

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

289
views

117
downloads

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

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

COMPARATIVE ASSESSMENT OF THE SEISMIC PERFORMANCE OF FIXED BASE AND ROCKING BUILDING FRAMES EQUIPPED WITH AN ENERGY DISSIPATION SYSTEM Özen, Hazal; Dicleli, Murat; Department of Engineering Sciences (2023-3-06) In this study, the effect of columns with a rocking-base isolation system on enhancing the seismic performance of a reinforced concrete building is investigated. A compara- tive study comprising of comparisons of fixed-based and rocking-based systems with post-tensioning strands and free column ends is conducted. For analysis purposes, a reinforced-concrete building with shear walls was designed, modeled, and analyzed in ETABS software. Nonlinear boundary time history analysis (NTHA) was conducted by exposi...
Planar seismic source characterization models developed for probabilistic seismic hazard assessment of Istanbul Gülerce, Zeynep; Guner, Baris; Kaymakcı, Nuretdin (Copernicus GmbH, 2017-12-22) This contribution provides an updated planar seismic source characterization (SSC) model to be used in the probabilistic seismic hazard assessment (PSHA) for Istanbul. It defines planar rupture systems for the four main segments of the North Anatolian fault zone (NAFZ) that are critical for the PSHA of Istanbul: segments covering the rupture zones of the 1999 Kocaeli and Duzce earthquakes, central Marmara, and Ganos/Saros segments. In each rupture system, the source geometry is defined in terms of fault len...
Numerical and Experimental Analysis of Purely Pitching and Purely Plunging Airfoils in Hover Hızlı, Hasan; Kurtuluş, Dilek Funda (2012-07-06) Numerical and experimental study of two-dimensional purely pitching and purely plunging SD7003 and NACA0012 airfoil sections in hover mode is presented. Main objectives of the study are to provide a better understanding of the aerodynamic phenomena and the vortex topology of flapping wings for application to micro air vehicle (MAV) designs and to compare numerical and experimental results for observing the performance of the experimental setup for future applications. The commercial CFD package program Flue...
Numerical simulation of scour at the rear side of a coastal revetment Şentürk, Barış Ufuk; Guler, Hasan Gokhan; Baykal, Cüneyt (2023-05-01) This paper presents the results of a numerical modeling study on the scouring of unprotected rear side material of a rubble mound coastal revetment due to the overtopping of solitary-like waves utilizing a coupled hydro-morphodynamic computational fluid dynamics (CFD) model. Three cases having various wave heights are tested with six different turbulence models together with different wall functions. The hydrodynamic results (free-surface elevations, overtopping volumes, and jet thicknesses) and morphologic...
Analytical modeling of asymmetric multi-segment rotor - bearing systems with Timoshenko beam model including gyroscopic moments Özşahin, Orkun; Özgüven, Hasan Nevzat (2014-11-01) In this study, analytical modeling and an analysis approach for asymmetric multi-segment rotor bearing systems are presented. Timoshenko beam model which includes the effect of gyroscopic moments is employed for modeling rotor segments. Instead of applying FEM, sub-segment Frequency Response Functions (FRFs) are obtained analytically, and sub-segment FRFs obtained are coupled by using receptance coupling method. Bearing properties are included into system dynamics by employing structural modification techni...

Citation Formats

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