scholarly journals Seismic behavior of carbon fiber reinforced polymer confined concrete filled thin-walled steel tube column-foundation connection

2021 ◽  
pp. 114804
Author(s):  
Tianxiang Xu ◽  
Sumei Zhang ◽  
Jiepeng Liu ◽  
Xuanding Wang ◽  
Ying Guo
Keyword(s):  
Carbon Fiber ◽  
Seismic Behavior ◽  
Steel Tube ◽  
Fiber Reinforced Polymer ◽  
Confined Concrete ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Column Foundation ◽  
Thin Walled

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.

Failure mechanism of fiber-reinforced polymer-confined concrete column with initial defects

2018 ◽  
Vol 52 (21) ◽  
pp. 2887-2897 ◽  
Author(s):  
Ying Xu ◽  
Chengyin Liu ◽  
Lei Chai ◽  
Miaomiao Lu ◽  
Congcong Luo
Keyword(s):  
Carbon Fiber ◽  
Defect Size ◽  
Fiber Reinforced Polymer ◽  
Confined Concrete ◽  
Carbon Fiber Reinforced Polymer ◽  
Concrete Column ◽  
Fiber Reinforced ◽  
Initial Defect ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

The effect of initial defect size on the mechanical behavior and failure mode of carbon fiber-reinforced polymer- confined concrete column was investigated through theoretical analysis, finite element software simulation and experiment validation. Qualitative theoretical analysis was firstly explored to study the effect of initial defect size on the mechanical behavior of confined concrete column from macro to micro perspective. Numerical simulations and experimental investigation were then carried out and compared to investigate the mechanical behavior of carbon fiber-reinforced polymer-confined concrete column with initial defects under axial compression and eccentric compression. The variation of defect criticality was investigated by varying the layer number of carbon fiber-reinforced polymer and cross-section size of concrete columns. The effect of initial defect size on the failure mode of carbon fiber-reinforced polymer-confined concrete column was finally demonstrated.

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