Study on mechanical properties and application in communication pole line engineering of glass fiber reinforced polyurethane composites (GFRP)

Reinforced concrete poles, wooden poles and steel poles are commonly used in communication pole line engineering, but there are numerous shortcomings, which can’t be ignored. In this paper, a scheme of applying glass fiber reinforced polyurethane composites (GFRP) instead of traditional materials to manufacture poles in communication pole line engineering is proposed. The technical properties and bending moment of GFRP poles were studied through material test and bending performance test. Furthermore, Abaqus was used to carry out finite element analysis on GFRP pole, and physical and mechanical properties of GFRP and traditional materials were compared. Referring to GB/T 51421–2020 and DL/T 5219–2014, structural design of GFRP pole and foundation was carried out, respectively. Finally, economic benefit of GFRP pole was analyzed, then an innovative installation method of GFRP pole was proposed. Results show that GFRP has high stiffness, light weight, high strength and durability. Besides, GFRP pole has sufficient flexural bearing capacity, and foundation has excellent overturning stability, which lays a foundation for the application of GFRP in communication pole line engineering.