Experimental Research on Fatigue Performance of Bent Steel Plates with Surface Cracks Using Externally Bonded Reinforcing Plates

DENG Yang; WANG Tong; LI Benxin; DU Tongxin; CAO Baoya

doi:10.3724/j.gyjzG24013001

Volume 54 Issue 6

Jun. 2024

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DENG Yang, WANG Tong, LI Benxin, DU Tongxin, CAO Baoya. Experimental Research on Fatigue Performance of Bent Steel Plates with Surface Cracks Using Externally Bonded Reinforcing Plates[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(6): 91-99. doi: 10.3724/j.gyjzG24013001

Citation:

DENG Yang, WANG Tong, LI Benxin, DU Tongxin, CAO Baoya. Experimental Research on Fatigue Performance of Bent Steel Plates with Surface Cracks Using Externally Bonded Reinforcing Plates[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(6): 91-99. doi: 10.3724/j.gyjzG24013001

Citation:

DENG Yang, WANG Tong, LI Benxin, DU Tongxin, CAO Baoya. Experimental Research on Fatigue Performance of Bent Steel Plates with Surface Cracks Using Externally Bonded Reinforcing Plates[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(6): 91-99. doi: 10.3724/j.gyjzG24013001

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Experimental Research on Fatigue Performance of Bent Steel Plates with Surface Cracks Using Externally Bonded Reinforcing Plates

doi: 10.3724/j.gyjzG24013001

1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. Infrastructure Property Management Center of the National Development and Reform Commission, Beijing 100045, China

Received Date: 2024-01-30
Available Online: 2024-06-24

Abstract

Abstract

To explore the fatigue performance of surface-cracked bent steel plates with different reinforcing materials, fatigue loading tests were conducted on Q345 steel plates with surface cracks using Carbon Fiber Reinforced Polymer (CFRP) plates and steel plates as reinforcement schemes. The effects of initial crack size, reinforcing plate thickness, and bonding methods on the reinforcement performance were analyzed. During the tests, the depth and length of crack propagation were measured using an ultrasonic flaw detector, and the crack propagation process in the steel plates was simulated by using the Extended Finite Element Method (XFEM). The results showed that both CFRP plates and steel plates could effectively extend the fatigue life of the damaged steel plates and suppress crack propagation. When double-layered reinforcing plates were used, delamination failure occurred, affecting the reinforcement effect. Therefore, it was recommended to use a single-layer bonding method for reinforcement. The reinforcement effect of CFRP plates was superior to that of steel plates, and increasing the thickness of the reinforcing plates further enhanced the reinforcement effect. Reinforcement was significantly more effective on damaged steel plates with larger initial cracks compared to those with smaller initial cracks. The fatigue life and crack length obtained from XFEM simulation of crack propagation were consistent with the experimental results.
- surface crack,
- steel plate reinforcement,
- CFRP plate reinforcement,
- fatigue loading,
- fatigue life,
- crack propagation

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References(19)

References

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