Quasi-Static Numerical Simulations and Resilient Force Models of GFRP-Confined FRP Bar-Reinforced Concrete Piers

FU Xin; PAN Molan; WANG Daiyu; WU Duanshuo

doi:10.3724/j.gyjzG24040301

Volume 54 Issue 6

Jun. 2024

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2024 > 54(6): 31-45

FU Xin, PAN Molan, WANG Daiyu, WU Duanshuo. Quasi-Static Numerical Simulations and Resilient Force Models of GFRP-Confined FRP Bar-Reinforced Concrete Piers[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(6): 31-45. doi: 10.3724/j.gyjzG24040301

Citation:

FU Xin, PAN Molan, WANG Daiyu, WU Duanshuo. Quasi-Static Numerical Simulations and Resilient Force Models of GFRP-Confined FRP Bar-Reinforced Concrete Piers[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(6): 31-45. doi: 10.3724/j.gyjzG24040301

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Quasi-Static Numerical Simulations and Resilient Force Models of GFRP-Confined FRP Bar-Reinforced Concrete Piers

doi: 10.3724/j.gyjzG24040301

FU Xin¹,
PAN Molan^2,3,
WANG Daiyu^{2,3
,
,},
WU Duanshuo^2,3

1. No. 3 Engineering Co., Ltd., of CCCC First Highway Engineering Ltd., Beijing 101102, China;
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;
3. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education(Harbin Institute of Technology), Harbin 150090, China

Received Date: 2024-04-03
Available Online: 2024-06-24

Abstract

Abstract

To study the seismic performances of a novel of GFRP-confined FRP bar-reinforced concrete piers, also called FCFRC piers which were constructed of GFRP rebars, CFRP stirrups, GFRP sheets, and concrete, a numerical simulation model for FCFRC piers under the monotonic and cyclic horizontal loads was developed based on software OpenSee. By the model, taking axial compressive ratios, shear-span ratios, longitudinal reinforcement ratios, confining levels of CFRP stirrups and external wrapped sheets, strength degrees of concrete and sizes of cross sections of piers as variables, pushover analysis was conducted on 5 184 FCFRC pier specimens. The effect of the above variables on key parameters of the trilinear resilience model with the yield bearing capacity, the peak bearing capacity, the elastic and elastic-plastic stiffness, and the ultimate drift angle was obtained. Analysis results indicated that the yield and ultimate bearing capacities all could be improved by increasing axial compressive ratios, longitudinal reinforcement ratios, strength degrees of concrete and sizes of cross sections, however, the confining levels of CFRP stirrups and external wrapped sheets had a little effect on them relatively. Based on the results of parameter analysis, the formulas for key parameters of the resilient model were obtained. In addition,the loading-unloading hysteresis regulation between horizontal force and displacement of FCFRC piers was proposed. Combining the skeleton curve and the hysteresis regulation, a resilient model for horizontal force and displacement of FCFRC piers was presented, simultaneously, compared with the test results, the adaptability of the model was verified.
- FRP-confined concrete,
- FRP bar-reinforced concrete pier,
- quasi-static simulation,
- resilient force model

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References

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