Combination form analysis and experimental study of mechanical properties on steel sheet glass fiber reinforced polymer composite bar
Chao WU1,2,3, Xiongjun HE1,2, Li HE4(), Jing ZHANG5, Jiang WANG6
1. School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, China 2. Hubei Province Highway Engineering Research Center, Wuhan 430063, China 3. CERIS, Instituto Superior Técnico, Universidade de Lisboa, Lisboa 1049-001, Portugal 4. School of Civil Engineering, Guizhou Institute of Technology, Guiyang 550003, China 5. China Railway Major Bridge Reconnaissance & Design Institute Co., Ltd, Wuhan 430056, China 6. WISDRI Engineering & Research Incorporation Limited, Wuhan 430023, China
The concept of steel sheet glass fiber reinforced polymer (GFRP) composite bar (SSGCB) was put forward. An optimization plan was proposed in the combined form of SSGCB. The composite principle, material selection, and SSGCB preparation technology have been described in detail. Three-dimensional finite element analysis was adopted to perform the combination form optimization of different steel core structures and different steel core contents based on the mechanical properties. Mechanical tests such as uniaxial tensile, shear, and compressive tests were carried out on SSGCB. Parametric analysis was conducted to investigate the influence of steel content on the mechanical properties of SSGCB. The results revealed that the elastic modulus of SSGCB had improvements and increased with the rise of steel content. Shear strength was also increased with the addition of steel content. Furthermore, the yield state of SSGCB was similar to the steel bar, both of which indicated a multi-stage yield phenomenon. The compressive strength of SSGCB was lower than that of GFRP bars and increased with the increase of the steel core content. Stress-strain curves of SSGCB demonstrated that the nonlinear-stage characteristics of SSGCB-8 were much more obvious than other bars.
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