Author: Li, Fengying
Title: Finite element analysis of self-centering bridge piers enabled by FRP tendons
Advisors: Dai, Jianguo (CEE)
Degree: M.Sc.
Year: 2019
Subject: Bridges -- Foundations and piers
Fiber reinforced plastics
Hong Kong Polytechnic University -- Dissertations
Department: Department of Civil and Environmental Engineering
Pages: 67 pages : illustrations
Language: English
Abstract: Compared to the traditional reinforced concrete bridge piers, the self-centering bridge pier can reduce the damage after earthquakes, and save time and money for the maintenance. FRP tendons is an elastic high-performance material, which can maintain elasticity under large strain stage. Unbounded post-tensioned FRP tendons have advantages for self-centering piers. Since the researches on the seismic behavior of self-centering bridge piers enabled by FRP tendons are not adequate, this study uses the numerical simulation on the ABAQUS platform to analyze the influence of various parameters, which is reliable and high-efficiency. The three-dimensional finite element model was validated with existing experimental results before conducting the parametric analysis. The parametric study includes the effects of the concrete strength, the initial post-tensioning (PT) stress level in the tendons, confinement for segments, construction details, the internal energy dissipater length, and the internal energy dissipater ratio ( the internal energy dissipater is developed by mild steel ). It was found that the initial PT stress level, the internal energy dissipater ratio and the internal energy dissipater length are the most influential factors contributing to the ductility, while the other factors analyzed in this study have insignificant effects. Higher PT level has positive effects on the stiffness and energy-dissipation. Increasing the internal energy dissipater ratio can also increase the stiffness and energy-dissipation of the pier. The effect of internal energy dissipater length for the energy-dissipation capacity is related to the trend of the joint open.
Rights: All rights reserved
Access: restricted access

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