Journal of Engineering, Project, and Production Management, 2026, 16(6), 2026-65
Mechanical Properties and Reinforcement Design of FRP Strengthened Steel Structural Members and Joints
1 Associate
Professor, College of Civil Engineering, Hunan City University, Yiyang,
413000, China, E-mail: RanHezzaz@outlook.com(corresponding author).
2 Postgraduate Student, College of
Civil Engineering, Hunan City University, Yiyang, 413000, China, E-mail:
18569262335@163.com
3 Director, Department of
Intelligent Construction, College of Civil Engineering, Hunan City
University, China, E-mail: longhao@hncu.edu.cn
4 Laboratory Director, College of
Civil Engineering, Hunan City University, China, E-mail:
huzhangqi0413@163.com
Engineering Management
Received January 15, 2026; revised March 12, 2026; accepted July 24, 2026
Available online August 12, 2026
Abstract: In view of the problems of insufficient stability, low bearing capacity prediction accuracy, and poor engineering applicability of traditional steel structure node reinforcement methods, this study proposes and verifies a systematic Fiber Reinforced Plastic (FRP) reinforcement method to improve the comprehensive reinforcement performance of typical beam-column joints in steel structures. A composite reinforcement strategy combining FRP wrapping, cross-section enlargement, and steel plate bonding is adopted. Experimental validation is conducted on simplified member-level specimens, and the methodology is extended to joint reinforcement by accounting for interface bonding and composite action. Key results show that the stability coefficient of FRP-reinforced members reaches 0.45 at a slenderness ratio of 95, the FRP stress utilization ratio attains 93% at a bond length of 250 mm, and the double-layer FRP scheme retains 82% of stiffness. Fatigue life remains 650,000 cycles under low stress levels. The proposed FRP reinforcement design exhibits excellent stability, uniform stress distribution, interfacial bond performance, and long-term durability, providing reliable theoretical support and practical guidance for the engineering reinforcement of steel-structure joints.
Keywords: FRP reinforcement; steel structure nodes; section equivalent; energy method; stability performance; reinforcement design.
Copyright © Journal of Engineering, Project, and Production Management (EPPM-Journal).
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.
Requests for reprints and permissions at eppm.journal@gmail.com.
Citation: He, R., Liu, K., Long, H., and Hu, Z. (2026). Mechanical Properties and Reinforcement Design of FRP Strengthened Steel Structural Members and Joints. Journal of Engineering, Project, and Production Management, 16(6), 2026-65.
