scholarly journals Study on Repaired Earthquake-Damaged Bridge Piers under Seismic Load

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Jun Deng ◽  
Tonghua Liu ◽  
Weizhi Xie ◽  
Wei Lu
Keyword(s):  
Peak Load ◽  
Steel Tube ◽  
Fiber Reinforced Polymer ◽  
Bridge Piers ◽  
Seismic Load ◽  
Concrete Bridge ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Repair Materials ◽  
Rc Bridge Piers

The concrete bridge pier damaged during earthquakes need be repaired to meet the design standards. Steel tube as a traditional material or FRP as a novel material has become popular to repair the damaged reinforced concrete (RC) bridge piers. In this paper, experimental and finite element (FE) studies are employed to analyze the confinement effectiveness of the different repair materials. The FE method was used to calculate the hysteretic behavior of three predamaged circle RC bridge piers repaired with steel tube, basalt fiber reinforced polymer (BFRP), and carbon fiber reinforced polymer (CFRP), respectively. Meanwhile, the repaired predamaged circle concrete bridge piers were tested by pseudo-static cyclic loading to study the seismic behavior and evaluate the confinement effectiveness of the different repair materials and techniques. The FE analysis and experimental results showed that the repaired piers had similar hysteretic curves with the original specimens and all the three repair techniques can restore the seismic performance of the earthquake-damaged piers. Steel tube jacketing can significantly improve the lateral stiffness and peak load of the damaged pier, while the BFRP and CFRP sheets cannot improve these properties due to their thin thickness.

Evaluation of RC Bridge Piers Retrofitted using Fiber-Reinforced Polymer (FRP)

2008 ◽  
Author(s):  
M. A. Shayanfar ◽  
M. S. Zarrabian ◽  
Adolfo Santini ◽  
Nicola Moraci
Keyword(s):  
Fiber Reinforced Polymer ◽  
Bridge Piers ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Rc Bridge Piers

Seismic Behavior of Severe Damaged GFRP Tubed RC Bridge Piers Repaired with CFRP

2012 ◽  
Vol 256-259 ◽  
pp. 2168-2173
Author(s):  
Xuan Wang ◽  
Ce Wang
Keyword(s):  
Seismic Behavior ◽  
Lateral Displacement ◽  
Fiber Reinforced Polymer ◽  
Bridge Piers ◽  
Fiber Reinforced ◽  
Cfrp Sheets ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Seismic Force ◽  
Rc Bridge Piers

In order to investigate the seismic behavior of earthquake-damaged glass fiber reinforced polymer (GFRP) tubed reinforced concrete(RC) bridge piers repaired with wrapped carbon fiber reinforced polymer (CFRP) sheets. An experimental study, in which four GFRP tubed RC bridge piers repaired with wrapped CFRP sheets were tested under constant axial load and cyclic lateral displacement excursions that simulated seismic force,are presented in this study. Researches show that repaired with CFRP not only increase bridge piers’ultimate strength but also improve the performance such as ductility.

Seismic performance of FRP-reinforced concrete-filled thin-walled steel tube considering local buckling

2018 ◽  
Vol 37 (9) ◽  
pp. 592-608 ◽  
Author(s):  
CY Zhu ◽  
YH Zhao ◽  
L Sun
Keyword(s):  
Energy Dissipation ◽  
Seismic Performance ◽  
Local Buckling ◽  
Steel Tube ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Thin Walled

The objective of this study is to investigate the seismic performance of fiber-reinforced polymer-reinforced concrete-filled thin-walled steel tube (CFTST). Twelve specimens with different fiber-reinforced polymer types (glass fiber-reinforced polymer and carbon fiber-reinforced polymer) and reinforcing modes were tested under constant axially compressive load and cyclic lateral load. The failure mode and lateral load versus displacement relationship for each specimen were recorded during testing. The strength, ductility, and energy dissipation capacity were analyzed accordingly. Further, a stress–strain relationship and a restoring force model of the fiber-reinforced polymer confining steel tube with local buckling were proposed. A hysteretic model for the fiber-reinforced polymer-reinforced CFTST was developed subsequently. The results indicate that the seismic performance of fiber-reinforced polymer-reinforced CFTST can be effectively improved by optimizing the fiber-reinforced polymer type and corresponding reinforcing scheme. Carbon fiber-reinforced polymer and glass fiber-reinforced polymer are suitable materials for the confinement and bending reinforcement of the column, respectively. The modeling results show the energy imported into the column is mainly dissipated by the thin-walled steel tube. The energy dissipation proportion of the steel tube, concrete core, and longitudinal fiber-reinforced polymer are >80%, 10%–20%, and <8%, respectively. The energy dissipation value of the steel tube can be improved more than 40% after effectively restraining the local buckling.

Concrete Bridge Decks Constructed with Fiber-Reinforced Polymer Stay-in-Place Forms and Grid Reinforcing

2002 ◽  
Vol 1814 (1) ◽  
pp. 219-226 ◽  
Author(s):  
David A. Dieter ◽  
Joshua S. Dietsche ◽  
Lawrence C. Bank ◽  
Michael G. Oliva ◽  
Jeffrey S. Russell
Keyword(s):  
Bridge Decks ◽  
Fiber Reinforced Polymer ◽  
Concrete Bridge ◽  
Fiber Reinforced ◽  
Concrete Bridge Decks ◽  
Reinforced Polymer
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